Alcohol, Substance Use, and Withdrawal ICD-10 Codes That Bill

The assessment says moderate alcohol use disorder and cannabis abuse. The claim lists three alcohol codes and a cannabis code, because each phrase in the note looked like it needed its own line. Alcohol, substance use, and withdrawal ICD-10 coding does not work that way. For one substance, you send the single code that captures the pattern.

Outpatient therapists, MAT clinics, and higher levels of care all use this family. The codes look dense. The structure repeats. Learn it once on alcohol and you can read opioid, cannabis, and the rest.

The FY2027 ICD-10-CM update, effective October 1, 2026, did not add or delete codes in Chapter 5.^[1][2] The rules below are the current official guidelines.^[3]

One Substance, One Pattern Code

Categories F10 through F19 are the substance families.

Inside most of those categories, the next characters follow a pattern. Abuse uncomplicated is often .10. Abuse in remission is .11. Dependence uncomplicated is .20. Dependence in remission is .21. Unspecified use sits in .9 and should be rare.

Two mapping habits prevent the stacked-code problem. When the record documents use and abuse of the same substance, assign abuse only. When it documents abuse and dependence, or use and dependence, assign dependence only.^[3] You do not report F10.10 and F10.20 together.

The guidelines also tie remission language to severity. A mild substance use disorder in remission maps to the abuse-in-remission code. A moderate or severe substance use disorder in remission maps to the dependence-in-remission code. Assign remission only when the clinician documents it.^[3]

Clinicians often document DSM severity, and the claim needs an ICD code. A documented mild substance use disorder maps to the abuse code. Moderate and severe map to dependence. The guidelines state that same split for remission: mild in remission goes to abuse in remission, and moderate or severe in remission goes to dependence in remission.^[3] If the note says "moderate alcohol use disorder, active," the claim is in the F10.2 dependence family, commonly F10.20 when no complication is documented. If the note says "mild cannabis use disorder," look at F12.10, not a dependence code.

Nicotine is the exception to memorize separately. Cigarette dependence uncomplicated is F17.210. Do not force nicotine into the F10 pattern.

Alcohol Withdrawal Codes

Withdrawal is more specific than "alcohol use." The header F10.23, alcohol dependence with withdrawal, is not billable. You need the complication character.^[4]

Abuse with withdrawal exists too: F10.130 uncomplicated, F10.131 delirium, F10.132 perceptual disturbance, F10.139 unspecified. Unspecified alcohol use with withdrawal is F10.930 through F10.939. Those unspecified-use codes are for a documented substance-related disorder, not for a social history of drinking.^[3]

A residential program in Duluth treating alcohol withdrawal delirium bills F10.231, not F10.20 plus a symptom code that tries to say delirium. An outpatient therapist in St. Paul who is seeing someone after withdrawal has cleared, with dependence still active and no current withdrawal, is usually back at F10.20. Do not leave a withdrawal code on weekly therapy claims after the withdrawal syndrome is over. The note and the code will disagree.

Intoxication is a different subcategory, F10.22 for dependence with intoxication. Do not report withdrawal and intoxication as if they were the same episode unless the record supports the code you chose. When you are unsure, query the clinician. Do not guess between delirium and uncomplicated.

Other Substances Follow the Same Spine

Opioid dependence uncomplicated is F11.20. Opioid dependence in remission is F11.21. Opioid abuse uncomplicated is F11.10. Withdrawal with opioid dependence uses F11.23 and then a final digit, on the same uncomplicated, delirium, perceptual disturbance, and unspecified pattern as alcohol.

Cannabis is F12. Clinicians sometimes undercode it as a comment in the social history and then wonder why a request for a higher level of care looks unsupported. If cannabis use disorder is a diagnosis you are treating, it belongs on the claim as F12.10, F12.20, or the remission code the severity supports.

Stimulant, cocaine, sedative, and inhalant claims fail for a boring reason. Someone bills F15 because the client uses Adderall, without a use disorder. Prescribed medication, taken as directed, is not a substance use disorder code. Long-term prescribed drug therapy has its own Z79 codes, and those Z79 codes are not for addiction treatment or for detox maintenance such as methadone for opioid dependence. For that treatment, use the substance dependence code.^[3]

Two substances means two codes. Alcohol dependence and opioid dependence can both be on the claim. Two codes for the same substance cannot, unless you have made the hierarchy mistake the guidelines tell you to avoid.

Sequencing, Programs, and the Denials We See

Sequence the substance that is the focus of this episode first. A withdrawal-management stay leads with the withdrawal code. A weekly therapy session focused on PTSD, with alcohol dependence in remission as context, may lead with the PTSD code and list F10.21 second. Flipping the order from claim to claim, with no change in the note, looks like an error.

Part 2 privacy rules can apply if you are a substance use program that receives federal assistance. Billing still needs a correct code. The designation of the program is a legal question, not a reason to omit the diagnosis on a claim the client has authorized.

Program codes are separate from F codes. Withdrawal management, residential treatment, and outpatient therapy do not share one CPT code. Minnesota and other state Medicaid programs often want HCPCS, modifiers, and revenue codes for SUD services. A diagnosis of F10.231 does not turn a residential day into 90837. Medicaid mental health billing is the starting point for those program rules, and the state SUD manual is the next stop.

Commercial denials on this family cluster in a few places. Header codes such as F10.2 or F10.23. Abuse plus dependence for one substance. A remission code the clinician never stated. Withdrawal billed for months of routine outpatient care. And ordinary setup denials, wrong payer and taxonomy, that have nothing to do with F10. Denial tracking separates those before anyone rewrites a correct F10.20.

If outpatient therapy is paying and the SUD program is not, compare that program's clean claim rate before you recode every F10 line.

What BreezyBilling Flags in Review

We do not assign the diagnosis. We notice when claims carry F10 and F11 headers, when withdrawal codes continue long after the notes describe stable outpatient care, and when remission is on the claim and absent from the assessment.

A dedicated coordinator can put that list in front of you at the monthly review. The clinical fix might be one sentence in the diagnostic formulation: alcohol use disorder, moderate, in early remission, or uncomplicated withdrawal, resolved. The billing fix is then mechanical.

If your practice treats co-occurring disorders, build the code choice into the assessment. Substance, severity, remission or active, and withdrawal present or absent. Those four answers pick the code.

Send the One Code That Tells the Truth

Alcohol, substance use, and withdrawal ICD-10 codes are specific on purpose. Use one code per substance, follow the abuse-versus-dependence hierarchy, and use a withdrawal code only while withdrawal is the condition you are coding. F10.20, F10.230, and F11.20 are tools. The headers above them will not pay.

If substance use claims are rejecting and you want help sorting code edits from payer edits, contact BreezyBilling. We will review the pattern with you.

Sources

1. ICD-10-CM Files - CDC/NCHS
2. FY 2027 ICD-10-CM Code Updates - HIAcode, 2026
3. FY 2027 ICD-10-CM Official Guidelines for Coding and Reporting - CMS and NCHS, 2026
4. 2026 ICD-10-CM Diagnosis Code F10.239 - ICD10data