CIWA score: CIWA-Ar scoring, thresholds, and documentation

In this article▾

1. What is the CIWA-Ar?
2. How to calculate a CIWA score
3. CIWA-Ar score ranges
4. What does a low CIWA score mean?
5. What does a CIWA score of 8-15 mean?
6. What does a CIWA score above 15 mean?
7. CIWA score and level-of-care decisions
8. CIWA-Ar should not be used by itself to predict complicated withdrawal
9. How to document a CIWA score
10. Document the trend, not just the highest score
11. Documentation for concurrent review
12. Common CIWA-Ar documentation mistakes
13. CIWA-Ar scoring quick reference
14. Frequently asked questions about CIWA scores
15. Final takeaway
16. Sources

The CIWA score, usually referring to the CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol, Revised), is a 10-item clinician-administered scale used to assess the severity of alcohol withdrawal symptoms.

Each item receives a score based on the patient's reported symptoms or observed signs. The maximum possible CIWA-Ar score is 67. The assessment covers nausea and vomiting, tremor, sweating, anxiety, agitation, tactile disturbances, auditory disturbances, visual disturbances, headache, and orientation/clouding of sensorium.

The score is useful for tracking withdrawal severity over time and supporting treatment decisions. It should not, however, be interpreted in isolation. ASAM recommends combining a validated withdrawal assessment with the patient's history, physical examination, risk factors, and clinical setting.

What is the CIWA-Ar?

CIWA-Ar is a revised version of the Clinical Institute Withdrawal Assessment for Alcohol. The original validation paper described it as a shortened 10-item scale for quantifying the severity of alcohol withdrawal.

The 10 CIWA-Ar domains are:

1. Nausea and vomiting
2. Tremor
3. Paroxysmal sweats
4. Anxiety
5. Agitation
6. Tactile disturbances
7. Auditory disturbances
8. Visual disturbances
9. Headache or fullness in head
10. Orientation and clouding of sensorium

A complete CIWA-Ar form carries the prompt and observation instructions for each domain, and records the date, time, pulse and blood pressure alongside the item scores.

Each symptom is scored from 0 to 7, except orientation and clouding of sensorium, which is scored from 0 to 4. The maximum total is therefore 67.

How to calculate a CIWA score

For each assessment:

1. Evaluate all 10 CIWA-Ar domains.
2. Assign the score that corresponds to the patient's symptoms or observed signs.
3. Add the individual item scores.
4. Record the total CIWA-Ar score.
5. Record the time of assessment.
6. Document the clinical action taken.
7. Repeat the assessment according to the patient's condition and the facility's withdrawal-management protocol.

Example

A patient's assessment produces the following scores:

The patient's CIWA-Ar score is 17.

That score should then be interpreted using the facility's adopted protocol and in the context of the patient's overall clinical presentation.

CIWA-Ar score ranges

There is an important point about CIWA thresholds: there is not one universally adopted set of score ranges for every clinical protocol.

The most widely published set, and the one most facility protocols are built from, runs:

The same literature adds the medication corollary: below roughly 8 to 10, pharmacological treatment is generally not necessary; between 8 and 15 it may be appropriate to prevent progression; above 15 it is strongly indicated. None of that is a medication order. It is a description of where most protocols draw their lines.

Sources: Identification and management of alcohol withdrawal syndrome · Sullivan et al. (1989), the CIWA-Ar validation paper

Why you may see different CIWA thresholds

ASAM uses a different set of example severity ranges in its alcohol withdrawal guideline:

ASAM explicitly notes that there is substantial variation in the literature and clinical practice regarding the score ranges that distinguish mild, moderate, and severe withdrawal. It also states that the CIWA-Ar itself does not establish its own severity categories and that clinical programs may choose reference ranges appropriate to their population and capabilities.

For clinicians, the practical rule is to use the threshold system specified by the protocol governing the patient's care. Do not mix thresholds from different protocols in the same treatment plan.

What does a low CIWA score mean?

A low CIWA-Ar score generally indicates that the patient is reporting or demonstrating relatively few withdrawal symptoms at the time of assessment.

It does not necessarily mean that the patient is at low risk for developing severe withdrawal.

If the screen that started the episode was a CAGE, note that it tells you nothing about current withdrawal either: CIWA-Ar is a measure of current withdrawal symptom severity, and that is a different question from risk. ASAM cautions that withdrawal assessment scales cannot reliably indicate future withdrawal risk when the patient is not currently experiencing withdrawal symptoms. Risk assessment should also consider factors such as previous withdrawal seizures or delirium, heavy and prolonged alcohol use, marked autonomic hyperactivity, age, medical comorbidities, and other relevant history.

A patient with a CIWA-Ar score of 4 and a history of severe withdrawal may therefore require a different level of monitoring than another patient with the same score and no significant withdrawal history.

What does a CIWA score of 8-15 mean?

On the commonly published ranges, 8 to 15 indicates moderate withdrawal with marked autonomic arousal.

Other guidelines use somewhat different boundaries. For example, ASAM's example categorization places scores from 10-18 in the moderate range.

The score should therefore be interpreted according to the applicable protocol rather than treating "8" or "10" as a universal medication threshold.

At this level, documentation should make clear:

• What symptoms produced the score.
• Whether symptoms are improving or worsening.
• What withdrawal-management intervention was provided.
• When the patient will be reassessed.
• Whether other risk factors make a higher level of monitoring appropriate.

What does a CIWA score above 15 mean?

A score above 15 indicates substantial withdrawal symptoms. The published ranges put it in the severe category, and the same literature notes that scores above 15 are predictive of seizures and delirium.

ASAM uses 19 or above as an example of severe withdrawal and states that patients experiencing severe withdrawal, such as CIWA-Ar 19 or above, should receive immediate treatment in a setting capable of managing complications.

The key point is that a high CIWA score should trigger clinical attention, not an automatic level-of-care decision based on the number alone.

ASAM specifically recommends considering withdrawal risk factors and the patient's complete clinical presentation in addition to the assessment score.

CIWA score and level-of-care decisions

The CIWA-Ar can provide important evidence when clinicians are determining whether a patient needs a particular withdrawal-management setting.

But a CIWA score is only one part of that decision.

ASAM's framework considers withdrawal and intoxication as one component of a broader multidimensional assessment. The current ASAM Criteria Fourth Edition describes level-of-care assessment as a process that identifies clinical needs and applies them to dimensional admission criteria, and our walkthrough of that assessment covers how withdrawal feeds into it.

For withdrawal management, the clinical record should therefore connect:

Withdrawal symptoms → risk → required monitoring/intervention → appropriate setting

For example:

"Patient presents with progressive tremor, diaphoresis, anxiety, and nausea following cessation of heavy daily alcohol use. CIWA-Ar increased from 9 at 0800 to 17 at 1200 despite initial intervention. History significant for prior withdrawal seizure. Patient requires continued medically monitored withdrawal management with serial reassessment."

This tells a reviewer considerably more than:

"CIWA = 17. Admit to higher level of care."

The first version documents the clinical reasoning behind the treatment setting.

CIWA-Ar should not be used by itself to predict complicated withdrawal

A high score can be clinically significant, but CIWA-Ar is not a standalone risk-prediction tool.

ASAM recommends using a validated instrument to assess withdrawal severity while also assessing individual risk factors. It cautions that scores can be confounded by conditions other than alcohol withdrawal. For example, fever, concurrent withdrawal from another substance, or other medical conditions can elevate scores, while medications such as beta-blockers can suppress some signs of withdrawal.

The scale also relies partly on patient self-report.

That creates another limitation. ASAM notes that CIWA-Ar can be difficult or impossible to administer reliably in patients who cannot communicate effectively, are experiencing delirium, or are critically ill. In those circumstances, an assessment approach relying more heavily on objective signs may be more appropriate.

How to document a CIWA score

A defensible CIWA-Ar note should let another clinician or reviewer reconstruct what happened during the assessment. For the surrounding history rather than the score itself, OLDCARTS is the usual framework.

At minimum, document:

• Date and time
• Individual item scores
• Total CIWA-Ar score
• Relevant vital signs
• Current withdrawal symptoms
• Intervention provided
• Patient response
• Next reassessment
• Relevant withdrawal-risk factors
• Clinical rationale for the treatment setting

Record each assessment with its time, the individual item scores, the total, and the action taken. Serial scores are the part that carries weight in concurrent review, because they show a reviewer that withdrawal was tracked and treated rather than simply noted once.

Basic documentation example

CIWA-Ar at 1400: 12. Nausea 2, tremor 3, sweats 2, anxiety 3, agitation 1, tactile 0, auditory 0, visual 0, headache 1, orientation 0. Patient alert and oriented. Vital signs documented separately. Withdrawal-management intervention administered per facility protocol. Patient reassessed after intervention with plan for continued serial CIWA-Ar monitoring.

This is stronger than:

"CIWA 12. Medication given."

The second statement documents the score but not how the score was generated or what happened afterward.

Document the trend, not just the highest score

Serial assessments are particularly useful in withdrawal management.

For example:

The trend gives the treating team and reviewer information about whether withdrawal is escalating, responding to treatment, or requiring continued monitoring.

A utilization reviewer evaluating continued withdrawal-management services can see not only that the patient had symptoms, but that those symptoms were changing over time and required ongoing clinical intervention.

Documentation for concurrent review

For a withdrawal-management authorization or concurrent review, avoid relying on the CIWA score as the entire medical-necessity argument.

Instead, connect the score to the patient's clinical needs.

A useful structure is:

1. Current withdrawal severity

"CIWA-Ar increased from 8 to 16 over four hours, with worsening tremor, diaphoresis, nausea, and anxiety."

2. Risk factors

"Patient reports previous withdrawal seizure and prolonged heavy alcohol use."

3. Treatment response

"Symptoms partially improved following intervention but remain clinically significant."

4. Monitoring requirement

"Patient requires continued serial withdrawal assessments and monitoring for progression to complicated withdrawal."

5. Level-of-care rationale

"Current symptoms and withdrawal risk require the monitoring and clinical resources available at the current withdrawal-management level."

This is much more persuasive as clinical documentation because it explains why the patient needs the service, rather than treating the CIWA score as an automatic authorization threshold.

For broader documentation principles, see our withdrawal management and medical necessity glossary entries. On the coding side, withdrawal management is usually billed through H0010 or a related code, and CO-50 is the denial to know when the record does not carry the clinical case.

Common CIWA-Ar documentation mistakes

1. Recording only the total

"CIWA = 15" does not show which symptoms produced the score.

Record the individual item scores when the instrument is administered.

2. Treating one threshold as universal

Different protocols use different severity boundaries.

The widely published ranges use under 8, 8 to 15, and over 15, while ASAM's guideline uses under 10, 10 to 18, and 19 or above as example severity categories. Follow the protocol applicable to the patient's setting.

3. Using the score as the only evidence of withdrawal risk

A current CIWA score does not replace a history of withdrawal seizures, delirium, heavy alcohol exposure, medical comorbidities, or other risk factors.

4. Failing to document the response to treatment

If an intervention is given, document the patient's response and the subsequent reassessment.

5. Copying forward old scores

Every CIWA assessment should correspond to an actual assessment at a documented time.

6. Using CIWA-Ar when the patient cannot reliably participate

CIWA-Ar relies partly on patient-reported symptoms. When communication is impaired or delirium is present, clinicians should consider an assessment method better suited to the patient's condition.

CIWA-Ar scoring quick reference

The published instrument carries the complete scoring anchors for each item, and the anchors matter: two clinicians scoring the same patient should land in the same place.

CIWA score interpretation

These are the most widely published ranges. Local protocols may use different boundaries, and ASAM's guideline uses under 10, 10 to 18, and 19 or above as example severity ranges.

Frequently asked questions about CIWA scores

What is a normal CIWA score?

A score below 8 is classified as mild withdrawal on the commonly published ranges. A low score does not establish that a patient is at low risk for future severe withdrawal, which is a different question.

What is a CIWA score of 10?

A score of 10 sits in the moderate range on both common systems: inside the 8 to 15 band on the widely published ranges, and at the bottom of ASAM's 10 to 18 example range. The appropriate treatment response depends on the applicable protocol and the patient's presentation.

What is a CIWA score of 15?

A score of 15 sits at the top of the moderate band on the widely published ranges, with severe beginning above it. ASAM draws the line differently, classifying 10 to 18 as moderate and 19 or above as severe. Follow the protocol governing the patient's care rather than treating 15 as a universal medication or placement threshold.

What is a CIWA score of 20?

A score of 20 represents substantial withdrawal symptoms and falls within ASAM's example severe range of 19 or above. Severe withdrawal requires prompt clinical management and appropriate monitoring. ASAM recommends immediate treatment in a setting capable of managing complications for patients experiencing severe withdrawal.

What is the highest possible CIWA-Ar score?

The maximum possible CIWA-Ar score is 67. Nine domains can each receive up to 7 points, while orientation/clouding of sensorium can receive up to 4 points.

How often should CIWA-Ar be repeated?

The reassessment interval should follow the patient's clinical condition and the facility's withdrawal-management protocol. Use the facility's protocol for reassessment intervals, and record the actual time of each assessment rather than an interval you intended to keep.

What can make a CIWA-Ar score misleading?

Several things. Fever, concurrent withdrawal from another substance, and other medical conditions can push the score up for reasons that are not alcohol withdrawal. Beta-blockers can suppress some of the signs and push it down. And because several items rely on patient report, the scale is hard to administer reliably in a patient who is delirious, critically ill, or cannot communicate.

Who developed the CIWA-Ar?

Sullivan and colleagues, in a 1989 paper in the British Journal of Addiction describing a shortened 10-item version of the original Clinical Institute Withdrawal Assessment for Alcohol.

How many items are on the CIWA-Ar and what is the maximum?

Ten items. Nine are scored 0 to 7 and orientation and clouding of sensorium is scored 0 to 4, giving a maximum of 67.

Does a high CIWA score automatically determine the level of care?

No. CIWA-Ar is one component of withdrawal assessment. Level-of-care decisions should also consider withdrawal history, current medical and psychiatric conditions, risk of complications, monitoring needs, available support, and the resources required to safely manage the patient. ASAM recommends using validated assessment instruments alongside individual risk factors and clinical examination.

Final takeaway

The CIWA-Ar score gives clinicians a structured way to quantify current alcohol withdrawal symptoms and track how those symptoms change over time.

The most useful CIWA documentation does more than record a number. It shows:

• What symptoms were present.
• How each domain was scored.
• What the total score was.
• How the score changed over time.
• What intervention was provided.
• How the patient responded.
• What withdrawal-risk factors were present.
• Why the patient required the monitoring and treatment setting selected.

The thresholds need handling carefully. The widely published ranges are under 8, 8 to 15, and over 15, while ASAM's guideline uses under 10, 10 to 18, and 19 or above as example severity ranges. Neither is a universal medication order or an automatic level-of-care rule.

For concurrent review, the strongest record is therefore not simply "CIWA = 18." It is a serial clinical record showing the patient's symptoms, risk, response to treatment, and continuing need for withdrawal-management resources.

Sources

1. Sullivan, J. T., Sykora, K., Schneiderman, J., Naranjo, C. A., & Sellers, E. M. (1989). Assessment of alcohol withdrawal: The revised Clinical Institute Withdrawal Assessment for Alcohol scale (CIWA-Ar). British Journal of Addiction, 84(11), 1353-1357. pubmed.ncbi.nlm.nih.gov
2. Mirijello, A., et al. Identification and management of alcohol withdrawal syndrome. Drugs. pmc.ncbi.nlm.nih.gov
3. American Society of Addiction Medicine. Clinical practice guideline on alcohol withdrawal management. asam.org
4. American Society of Addiction Medicine. The ASAM Criteria, Fourth Edition. asam.org

Related guides: COWS scoring · CAGE questionnaire · Alcohol use disorder ICD-10 · Alcohol dependence ICD-10 · ASAM level of care assessment · H0010 code guide

Every source above was opened and checked on October 4, 2026. This is educational content and does not replace the published instrument, your facility's withdrawal-management protocol, or clinical judgment.