ASAM Level 3.5: criteria, 3.7, and where Level 3.3 went

In this article▾

1. What is ASAM Level 3.5?
2. Who qualifies for ASAM Level 3.5?
3. What is the difference between ASAM Level 3.1, 3.5, and 3.7?
4. ASAM Level 3.5 vs. Level 3.7: Why the medical-management boundary matters
5. What happened to ASAM Level 3.3?
6. What changed in ASAM's Fourth Edition?
7. What services does ASAM Level 3.5 include?
8. What does it take to bill ASAM Level 3.5?
9. Which billing codes are used for ASAM Level 3.5?
10. Common ASAM Level 3.5 billing and placement problems
11. How to prevent ASAM placement and billing mismatches
12. Frequently asked questions
13. The bottom line

ASAM Level 3.5 is Clinically Managed High-Intensity Residential Treatment. It is designed for people with substance use disorders who need a structured, 24-hour residential treatment environment and intensive clinical services, but do not require the medical management of a Level 3.7 program.

Under the ASAM Criteria Fourth Edition, Level 3.5 is part of the residential continuum. It provides intensive addiction treatment in a structured living environment, with clinical services, recovery skill development, and support for patients whose needs cannot be adequately addressed through outpatient treatment or lower-intensity residential care.

For clinicians, the placement question is whether the patient's clinical needs require high-intensity residential treatment. For program administrators and revenue cycle teams, the question is whether the assessment, staffing, services, authorization, and claim all support Level 3.5.

There is also a terminology issue worth addressing immediately: ASAM Level 3.3 is no longer a separate adult level of care in the Fourth Edition. The older designation, Clinically Managed Population-Specific High-Intensity Residential Treatment, was part of the Third Edition. Providers using older assessments, payer policies, or state regulations need to understand the difference before making a placement or billing decision.

And one distinction matters more than most: Level 3.5 is clinically managed residential care, while Level 3.7 is medically managed residential care. The difference is not simply how many therapy hours a patient receives. It is whether the patient's medical and psychiatric needs require the medical management capabilities of the higher level.

What is ASAM Level 3.5?

ASAM Level 3.5 is Clinically Managed High-Intensity Residential Treatment for adults with substance use disorders.

It is a 24-hour residential treatment setting where patients receive structured, intensive clinical services while living at the facility. The program addresses substance-related risks, recovery skills, behavioral health needs, and the patient's ability to function safely outside a structured environment.

The ASAM Criteria are a multidimensional framework for determining the appropriate level of addiction treatment. Placement rests on the patient's clinical needs, risks, strengths, recovery environment and ability to participate. Our ASAM Criteria explainer covers the framework, and the levels of care guide covers the full continuum.

Level 3.5 is generally appropriate when a patient needs a highly structured residential environment and intensive therapeutic services, but does not require the medical management associated with Level 3.7.

ASAM Level 3.5 at a glance

Level 3.5 is not a residential facility that offers more counseling sessions. The program must meet the clinical, staffing, service, licensing and payer requirements for the level it bills. On service intensity, the Fourth Edition puts Level 3.5 above 20 hours of clinical services per week, available seven days a week, with clinical staff on site and alert 24 hours a day. That is the same weekly band as Level 2.5 high-intensity outpatient; what separates them is the 24-hour residential setting, not the hour count.

Sources: Washington State ASAM 4th Edition service grid · Virginia Administrative Code 12VAC30-130-5130

The exact service definitions and coverage requirements depend on the ASAM edition adopted by the state or payer.

Who qualifies for ASAM Level 3.5?

A patient may be appropriate for Level 3.5 when their substance-related needs require intensive residential treatment and a structured recovery environment, but they do not require medically managed residential care.

There is no single diagnosis, substance, or history of relapse that automatically qualifies someone for Level 3.5.

A patient with opioid use disorder does not automatically need residential treatment. Neither does a patient with multiple substance use disorders, a history of overdose, or a previous unsuccessful outpatient episode.

The placement decision should come from a multidimensional clinical assessment.

Under the Fourth Edition, the adult Level of Care Assessment considers risks and needs across the dimensions and applies decision rules to reach a recommendation. The assessment should establish why residential treatment is necessary and why a less intensive setting would not adequately address the patient's needs. Our walkthrough of the level of care assessment covers how that is scored and recorded.

What clinical factors support Level 3.5?

The following are examples of factors that may support consideration of Level 3.5. They are not a replacement for the formal ASAM dimensional admission criteria or a payer's medical-necessity policy.

1. The patient needs a structured residential environment.

The patient may have difficulty maintaining safety, stability, or recovery in their current living environment. A residential setting can provide structure and support that outpatient services cannot adequately provide.

2. The patient needs intensive addiction treatment.

The patient's substance-related risks, behaviors, or functional difficulties may require more frequent and structured clinical interventions than outpatient or lower-intensity residential treatment can provide.

3. The patient's recovery environment does not adequately support treatment.

An unsafe or unstable living situation, limited recovery support, ongoing exposure to substances, or other environmental factors may affect the patient's ability to engage in treatment outside a residential setting.

4. The patient needs clinically managed treatment rather than medically managed residential care.

The patient may need substantial therapeutic support and residential structure without requiring the medical monitoring, biomedical capabilities, or medical management of Level 3.7.

5. The patient can participate in the proposed program.

The assessment should consider the patient's cognitive, psychiatric, physical, and person-centered needs, along with the program's ability to provide appropriate services.

These factors must be considered together. A difficult recovery environment alone does not establish that Level 3.5 is medically necessary if the patient's clinical needs can be met at a less intensive level with appropriate supports.

What is the difference between ASAM Level 3.1, 3.5, and 3.7?

The primary distinction is the intensity of clinical services and whether the patient requires medical management.

These are general descriptions, not a substitute for the admission criteria in the applicable ASAM edition.

A patient does not qualify for Level 3.5 simply because they need a bed, have completed outpatient treatment, or have been denied admission to Level 3.7.

The assessment must establish which level of care can appropriately address the patient's needs.

ASAM Level 3.5 vs. Level 3.7: Why the medical-management boundary matters

This distinction deserves particular attention because it can affect patient safety, clinical placement, authorization, and reimbursement.

Level 3.5 is clinically managed high-intensity residential treatment. Level 3.7 is medically managed residential treatment.

Level 3.5 is intended for patients who require intensive residential addiction treatment but do not require the medical management capabilities of Level 3.7.

Level 3.7 is appropriate when the patient's medical, withdrawal-related, or psychiatric needs require medically managed residential services under the applicable ASAM criteria.

The Fourth Edition integrates medically managed treatment into the main continuum. It also includes enhanced biomedical and co-occurring capabilities at specified levels, including Level 3.7 BIO and Level 3.7 COE.

The correct placement depends on the patient's needs and the program's capabilities.

When does a patient need Level 3.7 instead of 3.5?

A patient may require Level 3.7 when their clinical presentation includes needs that cannot be safely or effectively managed by a clinically managed residential program.

The Fourth Edition's Level of Care Assessment specifically considers whether symptoms of intoxication, withdrawal, or other physical or mental health concerns may require after-hours nursing monitoring or medical care, along with whether the patient has a safe environment and sufficient support outside the treatment setting.

Examples of concerns that may trigger a higher-level assessment include:

• Withdrawal-related risks requiring medical management
• Biomedical conditions requiring the medical capabilities of Level 3.7
• Psychiatric or cognitive concerns that require a medically managed setting
• Need for after-hours medical or nursing monitoring that the Level 3.5 program cannot provide
• A recovery environment that cannot safely support the patient's needs without medically managed residential care

These are clinical considerations, not an automatic list of diagnoses that require Level 3.7.

The presence of a medical condition does not, by itself, establish Level 3.7. The relevant question is whether the patient's condition and required services meet the applicable medical-management criteria.

Why this distinction matters for authorization and denials

Consider a patient admitted to a Level 3.5 program whose assessment documents significant withdrawal-related symptoms and a need for medical monitoring beyond the program's capabilities.

If the record supports Level 3.7 but the authorization request describes Level 3.5, the clinical record and requested service may not align.

The reverse can also occur. A patient may have a substance use disorder and a history of withdrawal, but the current assessment may not support medically managed residential treatment.

The provider needs to document the patient's current clinical presentation and why the selected level is appropriate.

A prior authorization approval does not eliminate the need for the program to provide services within its capabilities or reassess a patient whose needs change.

What happened to ASAM Level 3.3?

ASAM Level 3.3 was a Third Edition designation: Clinically Managed Population-Specific High-Intensity Residential Treatment.

It was designed for populations with specific treatment needs, including people who may require a slower-paced or more supportive residential treatment environment.

In the Fourth Edition, Level 3.3 is no longer a separate adult level of care. It was eliminated alongside Level 0.5 and Level 3.2.

The residential continuum now runs Level 3.1, Level 3.5 and Level 3.7, with enhanced designations 3.5 COE, 3.7 BIO and 3.7 COE.

This is not a rename.

Sources: Washington State Health Care Authority, ASAM 4th Edition transition guidebook (August 2026) · ASAM Criteria, Fourth Edition

Does Level 3.3 become Level 3.5?

Not automatically.

A patient who would previously have been placed in Level 3.3 should receive an assessment using the criteria adopted by the state or payer.

Under the Fourth Edition, the level-of-care recommendation is determined by the patient's multidimensional needs and the applicable decision rules. A patient who previously received 3.3 services may now meet criteria for Level 3.1, Level 3.5, or another level, depending on their clinical presentation and service needs.

The old 3.3 designation should not be used as a shortcut for deciding the new placement.

A former Level 3.3 patient is not automatically a Level 3.5 patient. The patient's needs must support the new recommendation.

What about patients with cognitive impairment or other population-specific needs?

The Third Edition's Level 3.3 was associated with population-specific high-intensity residential treatment. Providers may still encounter older materials, state regulations, or payer policies that refer to the 3.3 designation.

The Fourth Edition addresses patient needs through the updated assessment and treatment framework, including consideration of cognitive functioning, psychiatric conditions, person-centered needs, and the program's ability to provide appropriate services.

For example, a patient with cognitive impairment may need additional support, adapted clinical interventions, or a program with particular capabilities. That does not mean the patient automatically meets Level 3.5 criteria.

The program must establish that the patient's clinical needs require Level 3.5 and that the program can provide the appropriate services.

What should providers do when an authorization still says Level 3.3?

Do not simply change the authorization to 3.5 without checking the applicable payer rules.

Confirm:

• Which ASAM edition the payer has adopted
• Whether the payer still recognizes the legacy 3.3 designation
• Whether a new assessment is required
• Whether the payer has issued a transition or crosswalk policy
• Whether the current authorization covers the proposed service
• Whether the program's license and contract cover the new level

Some state regulations and payer documents continue to use Third Edition terminology. Virginia's Level 3.5 regulation, for example, covers adult clinically managed high-intensity residential services and adolescent clinically managed medium-intensity residential services in the same section, which is itself a reminder that a state's mapping of a level is its own.

That regulation is a state-specific coverage rule. It should not be treated as a universal Fourth Edition crosswalk.

What changed in ASAM's Fourth Edition?

The Fourth Edition updates the assessment framework and reorganizes the continuum of care.

For residential programs, the most important changes involve the dimensional assessment, medical management, withdrawal management, and the role of person-centered considerations.

1. The six dimensions have been updated

The Fourth Edition retains a multidimensional assessment approach but revises the dimensions and how they contribute to placement.

The six dimensions for adults are:

Readiness to change is no longer an independent dimension that contributes directly to the level-of-care recommendation. Instead, it informs clinical judgments across the other dimensions and treatment planning.

Dimension 6 considers patient preferences, barriers to care, social determinants of health, and the need for motivational enhancement.

For Level 3.5, this means the assessment should consider both the patient's clinical risks and the practical factors that affect their ability to engage in residential treatment.

2. Medically managed care is integrated into the continuum

The Fourth Edition incorporates medically managed levels into the main continuum of care rather than treating withdrawal management as a separate parallel track.

For residential providers, the distinction between clinically managed Level 3.5 and medically managed Level 3.7 is central to determining whether the program has the capabilities needed to treat a particular patient.

The medically managed levels also provide psychosocial addiction treatment. Medical management does not mean the program stops delivering therapeutic services.

3. The separate withdrawal management levels have changed

The Third Edition had separate withdrawal management designations, including Level 3.2 WM and Level 3.7 WM.

The Fourth Edition integrates withdrawal management into the main continuum.

ASAM's FAQ sets out the mapping: Level 1 WM becomes Level 1.7, Level 2 WM becomes Level 2.7, Level 3.2 WM is integrated into Level 3.5, and Level 3.7 WM becomes Level 3.7.

The footnote on that third row is the one residential programs need. Patients who are in withdrawal, or expected to be, should have a medical evaluation before admission to determine whether clinically managed withdrawal is appropriate, and Level 3.5 programs have a medical director providing that oversight.

Sources: ASAM Criteria FAQ, withdrawal management integration · ASAM levels of care

This does not mean every patient experiencing withdrawal belongs in Level 3.5. The medical evaluation must determine whether the patient's needs can be managed at that level or require a medically managed setting.

What services does ASAM Level 3.5 include?

Level 3.5 provides intensive residential addiction treatment in a structured environment.

The specific services and staffing requirements depend on the ASAM edition, state licensing rules, and payer requirements.

Virginia's Medicaid regulation provides a useful state-specific example of the types of services that may be included in Level 3.5 residential treatment.

These include:

• Daily scheduled professional services
• Interdisciplinary assessment and treatment
• Psychoeducational activities
• Addiction pharmacotherapy and drug screening
• Monitoring of prescribed medications and relevant over-the-counter medications or supplements
• Motivational enhancement and engagement strategies
• Recreational therapy, art, music, physical therapy, or vocational rehabilitation, as appropriate
• Services for family and significant others, where appropriate to the treatment plan
• Arrangements for medical, psychiatric, psychological, laboratory, and toxicology services
• Access to addiction pharmacotherapy, including medication for substance use disorders, on site or through referral

The Virginia regulation also addresses emergency service availability, physician or physician-extender consultation, and arrangements for more and less intensive levels of care.

These are Virginia-specific requirements. Providers should consult their own state's regulations and payer contracts rather than assume the same service components and staffing rules apply nationally.

Does Level 3.5 include medication for opioid use disorder?

Medication for opioid use disorder may be part of treatment when clinically appropriate.

A residential setting should not assume that a patient must discontinue prescribed addiction medication to participate in treatment.

The Fourth Edition emphasizes access to medications for addiction treatment and integrates medically managed services into the continuum.

The provider should document the patient's medication needs, treatment plan, coordination with prescribers, and any applicable program requirements.

Medication management alone does not automatically determine whether a patient belongs at Level 3.5 or Level 3.7. The level depends on the patient's overall clinical needs and the capabilities required to treat them.

What does it take to bill ASAM Level 3.5?

Billing Level 3.5 requires more than a residential admission and a diagnosis of substance use disorder.

The provider must satisfy the payer's requirements for program eligibility, covered services, medical necessity, authorization, documentation, and claims submission.

There is no single nationwide billing rule that applies to every Medicaid program and commercial payer.

1. Verify the payer's Level 3.5 coverage requirements

Before admission or billing, confirm that the patient's benefit covers the service and that the facility is eligible to provide it.

Check:

• Whether the payer has adopted the Fourth Edition
• Whether the payer still uses Third Edition terminology
• Facility licensing and credentialing requirements
• Required ASAM assessment or documentation
• Prior authorization and continued-stay requirements
• Covered service definitions and staffing requirements
• Applicable billing codes, modifiers, and units
• Required clinical records and claim attachments

A state Medicaid regulation may establish minimum program requirements, while a commercial payer may have separate contract and authorization rules.

Do not assume that one payer's Level 3.5 requirements apply to another payer.

2. Establish medical necessity for residential treatment

The clinical record should explain why the patient needs Level 3.5 rather than outpatient treatment or lower-intensity residential care.

A diagnosis alone does not establish that residential treatment is medically necessary.

The assessment should describe the patient's current presentation and connect the identified needs to the proposed level of care.

A useful medical-necessity narrative addresses:

• The patient's substance-related condition and current risks
• Relevant withdrawal and biomedical concerns
• Psychiatric and cognitive needs
• Substance-use-related behaviors and risks
• Recovery environment and available supports
• Why the patient needs a 24-hour residential setting
• Why lower-intensity treatment is insufficient
• Why the patient does not require medically managed residential care
• The individualized treatment plan and reassessment needs

The clinical rationale should reflect the individual patient. Reusing the same generic residential-necessity statement for every admission does not establish that every patient meets Level 3.5 criteria.

3. Obtain prior authorization when required

Prior authorization is separate from the clinical placement recommendation.

A patient may meet Level 3.5 criteria while the provider still needs payer authorization before delivering or billing the service.

The authorization workflow should capture:

• Requested level of care
• Assessment supporting the request
• Requested authorization period
• Clinical services and treatment plan
• Required records submitted to the payer
• Authorization number and approved dates
• Any limits on days, units, or covered services

The authorization should reflect the level of care and service that the facility will actually provide.

If the patient's condition changes and the clinical team recommends Level 3.7, the provider should follow the payer's process for obtaining authorization for the revised level.

4. Document services delivered in the residential setting

The clinical record should support the services reported on the claim.

Depending on the payer and service, documentation may include:

• Date of service
• Services provided
• Rendering clinician and credentials
• Patient participation and response
• Treatment interventions
• Progress toward individualized goals
• Medication and care-coordination documentation, where relevant
• Required signatures and completion dates
• Any required residential census or daily service records

A residential bed being occupied does not, by itself, establish that every billed service was delivered or that the patient continued to meet the criteria for the authorized level.

The provider should follow the payer's requirements for daily documentation, units, service definitions, and record retention.

5. Support continued-stay authorization

Level 3.5 is not automatically medically necessary for a predetermined number of days.

Continued treatment should be supported by reassessment and documentation that the patient still requires the current level of care.

A continued-stay request should address:

• Changes since the previous review
• Current substance-related and clinical risks
• Response to treatment
• Progress toward treatment-plan goals
• Remaining barriers to recovery
• Why the residential setting remains necessary
• Why Level 3.1 or outpatient treatment is not yet sufficient
• Whether medical management at Level 3.7 is now indicated
• The anticipated transition or discharge plan

The goal is to demonstrate ongoing clinical need, not simply that the patient has not completed a standard residential program length.

Which billing codes are used for ASAM Level 3.5?

There is no universal billing code for ASAM Level 3.5 across all states and payers.

Virginia Medicaid's ARTS program identifies H2036, alcohol and/or other drug treatment program, per diem, for residential treatment services. The code, units, provider qualifications and service definitions all have to be verified against current Virginia Medicaid requirements, and note that a per diem code carries its own documentation expectations: the day has to be supported, not just the admission.

Sources: HCPCS H2036 · Virginia Administrative Code 12VAC30-130-5130

Other states and commercial payers may use different codes, modifiers, revenue codes, or billing structures.

Do not copy a billing code from another state's Medicaid manual or a general ASAM article without confirming the current payer requirements.

Common ASAM Level 3.5 billing and placement problems

Billing Level 3.5 when the patient needs Level 3.7

The record may document withdrawal, biomedical, or psychiatric needs that require medical management beyond the program's capabilities.

If the patient needs Level 3.7, the provider should address the clinical placement and authorization rather than trying to justify Level 3.5 solely because that is where a bed is available.

Treating Level 3.3 as automatically equivalent to 3.5

A legacy authorization or assessment using Level 3.3 should not automatically be converted to Level 3.5.

Verify the payer's adopted edition, transition guidance, and any required reassessment.

Using a diagnosis as the entire medical-necessity rationale

A diagnosis of severe substance use disorder does not, on its own, establish that a patient needs high-intensity residential treatment.

The assessment must connect the patient's actual clinical needs to the selected level.

Authorization and clinical documentation do not match

If the authorization describes Level 3.5 but the record supports a different level or a different service, the claim may not align with the approved care.

Continued stay is based on program length rather than clinical need

A standard 28-day or 30-day residential schedule does not replace reassessment. Continued treatment must be supported by the patient's current needs and the payer's continued-stay criteria.

How to prevent ASAM placement and billing mismatches

Residential treatment programs have several records that must agree:

Assessment → Level-of-care recommendation → Treatment plan → Authorization → Services delivered → Reassessment → Claim

A placement decision can be clinically appropriate and still create billing problems if the authorization, program capabilities, and documentation do not align.

For example, a clinical assessment may recommend Level 3.7 because the patient requires medical management. If the program is authorized and staffed only for Level 3.5, the team needs to address the mismatch before proceeding with care that exceeds the program's capabilities.

The reverse also matters. A patient may meet Level 3.5 criteria, but the record may not explain why residential treatment is necessary or why a lower level is insufficient.

Supa can help behavioral health teams organize clinical documentation and surface missing or inconsistent information before a chart is closed. For residential programs, that can include checking whether required assessment fields are complete, whether documentation supports the treatment plan, and whether service records align with the authorized level.

AI should support documentation and administrative review, not independently determine ASAM placement, medical necessity, or payer approval. The clinician remains responsible for the assessment and treatment recommendation, and the billing team remains responsible for applying the payer's current requirements.

For claims already denied, our CO-50 denial code guide covers the medical-necessity category and what to review, and prior authorization in behavioral health covers the step that prevents most of them. For the wider picture, see behavioral health billing for treatment centers.

Frequently asked questions

What is ASAM Level 3.5?

ASAM Level 3.5 is Clinically Managed High-Intensity Residential Treatment. It provides intensive addiction treatment in a 24-hour residential setting for patients who need substantial structure and clinical services but do not require medically managed residential care.

How many hours of treatment does ASAM Level 3.5 require?

More than 20 hours of clinical services per week, available seven days a week, with clinical staff on site and alert around the clock. That is the Fourth Edition service characteristic, not a billing threshold: your state regulation and payer contract set the service, staffing and unit requirements you actually bill against.

Who qualifies for ASAM Level 3.5?

Patients may qualify when a multidimensional assessment supports the need for high-intensity residential treatment and shows that outpatient or lower-intensity residential care is insufficient, while medically managed residential treatment is not required.

What is the difference between ASAM Level 3.5 and 3.7?

Level 3.5 is clinically managed high-intensity residential treatment. Level 3.7 is medically managed residential treatment. The distinction is whether the patient's medical, withdrawal-related, or psychiatric needs require the medical management capabilities of Level 3.7.

What happened to ASAM Level 3.3?

Level 3.3 was a Third Edition designation for Clinically Managed Population-Specific High-Intensity Residential Treatment. It is no longer a separate adult level in the Fourth Edition. Placement should be reassessed under the edition adopted by the state or payer rather than automatically converting every 3.3 patient to 3.5.

Does ASAM Level 3.3 automatically become Level 3.5?

No. The patient's current clinical needs and the applicable assessment criteria determine the appropriate level. Depending on those needs, the recommendation may be Level 3.1, 3.5, or another level.

Can a Level 3.5 program treat patients in withdrawal?

Level 3.5 may include clinically managed withdrawal-related services when appropriate to the patient's needs and the program's capabilities. ASAM states that patients who are in withdrawal or expected to experience withdrawal should receive a medical evaluation before admission to determine whether clinically managed withdrawal is appropriate. Patients who require medical management beyond the program's capabilities may need Level 3.7.

Does Level 3.5 include medication for opioid use disorder?

Medication for opioid use disorder may be included when clinically appropriate. Providers should follow the applicable ASAM standards, state requirements, payer rules, and individualized treatment plan.

What billing code is used for ASAM Level 3.5?

There is no universal billing code. Virginia Medicaid's ARTS program identifies H2036 for residential treatment services in relevant materials, but providers must confirm the current code, units, modifiers, and requirements for their own payer.

Does Level 3.5 require prior authorization?

That depends on the payer and benefit. Many plans require authorization for admission and continued residential treatment. Verify approved dates, units, documentation, and continued-stay requirements.

How long can a patient stay in Level 3.5?

There is no universal number of days that establishes medical necessity for every patient. Continued treatment should be supported by reassessment, current clinical needs, the applicable ASAM criteria, and payer requirements.

How often should a patient in Level 3.5 be reassessed?

The Fourth Edition recommends monthly formal reassessment at Levels 2.1, 2.5, 3.1 and 3.5, with treatment planning continuous in between and an update whenever new information changes the patient's needs. Payers and state regulators frequently require more frequent continued-stay review than that.

What happened to Level 3.2 withdrawal management?

It was integrated into Level 3.5. ASAM's mapping runs Level 1 WM to 1.7, Level 2 WM to 2.7, Level 3.2 WM to 3.5, and Level 3.7 WM to 3.7. The condition attached to the 3.5 row is a medical evaluation before admission for patients in withdrawal or expected to be.

Is Level 3.5 the same as inpatient treatment?

No. Level 3.5 is residential treatment. Under ASAM, Level 4 is inpatient care in a hospital setting with a broader regulatory framework. Residential and inpatient services have different settings and clinical requirements.

The bottom line

ASAM Level 3.5 is clinically managed high-intensity residential treatment for patients who need an intensive, structured residential environment but do not require medically managed residential care.

For clinicians, the assessment must establish why Level 3.5 is appropriate and why another level would not adequately address the patient's needs.

For billing teams, the work is to verify the payer's adopted ASAM edition, program eligibility, authorization, services delivered, and documentation supporting the claim.

And for providers still working with older Level 3.3 terminology, the important point is that the Fourth Edition does not provide a universal one-to-one conversion to Level 3.5. Reassess the patient, verify the payer's transition rules, and document the clinical rationale.

Sources and further reading

• American Society of Addiction Medicine. The ASAM Criteria, Fourth Edition. Official Fourth Edition overview.
• American Society of Addiction Medicine. ASAM Criteria FAQ.
• American Society of Addiction Medicine. ASAM Criteria, Third Edition.
• American Society of Addiction Medicine. The ASAM Criteria Fourth Edition Level of Care Assessment Guide: Adults.
• Virginia Administrative Code. 12VAC30-130-5130: Covered services for ASAM Level 3.5.
• American Society of Addiction Medicine. ASAM Level of Care Certification.
• Washington State Health Care Authority. (2026, August). Transition to the American Society of Addiction Medicine Criteria, 4th Edition. https://www.hca.wa.gov/assets/billers-and-providers/asam-fourth-edition-transition-guidebook.pdf
• Supa. The ASAM Criteria explained · ASAM levels of care · ASAM level of care assessment · ASAM Level 2.1.
• Supa. CO-50 denial code guide · H2036 code guide · Prior authorization in behavioral health.

Editorial note: The ASAM Criteria are copyrighted clinical standards. This article summarizes the framework and does not reproduce proprietary admission, continued-service or transition decision rules. ASAM states that inputting the Criteria and other ASAM intellectual property into artificial intelligence systems is strictly prohibited. Consult the applicable ASAM edition, your state regulations and your payer's guidance when making placement and billing decisions. Every source above was opened and checked on September 26, 2026.