ICD-10 F12 Cannabis Codes: Use Disorder,

Cannabis is now the most common substance on adolescent treatment admissions and a routine secondary diagnosis in adult SUD programs — which makes category F12 of ICD-10-CM unavoidable for behavioral health coders. Legalization has not simplified the coding: “patient uses marijuana” is not a diagnosis, and payers are more skeptical of cannabis-primary claims than of any other substance family. This guide covers every billable F12 code in the FY2026 code set, the use-versus-disorder line, and the documentation that keeps cannabis claims defensible.

All codes and titles are verified against the FY2026 ICD-10-CM code set (effective October 1, 2025) from CDC/NCHS ↗ and CMS ↗; rules cite the ICD-10-CM Official Guidelines FY2026 ↗, Section I.C.5.b. Part of the ICD-10 behavioral health directory.

F12 at a glance

Category F12, Cannabis related disorders, explicitly includes marijuana (an inclusion note in the tabular), and in practice covers THC in all forms — flower, concentrates, edibles, and vaped products. The familiar three-stem structure applies:

DSM-5-TR’s single cannabis use disorder maps onto the stems through the FY2026 inclusion terms:

Compared with F10 alcohol, the F12 family is leaner: withdrawal is a single code per stem, and the induced-disorder list is limited to psychotic disorder, anxiety disorder, other, and unspecified — there are no cannabis-induced mood, sleep, or sexual-dysfunction codes in FY2026.

• Mild CUD → F12.10 (cannabis abuse, uncomplicated)
• Moderate or severe CUD → F12.20 (cannabis dependence, uncomplicated)
• In remission: mild → F12.11; moderate/severe → F12.21

Complete F12 code table (FY2026)

All codes below are valid, billable FY2026 codes; four- and five-character entries like F12.1 and F12.22 are non-billable headers.

F12.1- — Cannabis abuse

F12.2- — Cannabis dependence

F12.9- — Cannabis use, unspecified

Use vs disorder in the legalization era

The question cannabis coding turns on: when does use become codable ?

Official Guidelines I.C.5.b.3 answers it. The unspecified-use codes (F12.9-) are assigned only when (1) the provider documents the use, and (2) the use is associated with a substance-related disorder or medical condition, and (3) that relationship is documented. Legal recreational use noted in a social history — with no associated disorder — does not generate a code. This is the rule that keeps “patient smokes marijuana on weekends” out of the problem list.

Where cannabis use is clinically relevant — it complicates a psychotic disorder, drives an anxiety presentation, interacts with treatment — the F12.9- codes exist precisely to capture that documented relationship. And once the provider documents abuse or dependence, the hierarchy takes over: per I.C.5.b.2, use + abuse documented together → code only abuse (F12.1-); abuse + dependence (or any combination including dependence) → code only dependence (F12.2-). Remission coding follows I.C.5.b.1: provider documentation only, with mild CUD in remission → F12.11 and moderate/severe → F12.21.

Cannabis-induced disorders — and the hyperemesis question

Two induced-disorder groups exist in F12, each requiring the provider to document both the condition and the causal link:

Cannabinoid hyperemesis syndrome (CHS) finally has its own code: R11.16, cannabis hyperemesis syndrome, in the FY2026 code set. Its tabular code also notes instruct coders to additionally assign the appropriate cannabis code — F12.1-, F12.2-, or the applicable F12.9- codes — plus manifestations such as dehydration (E86.0) or electrolyte imbalance (E87.8). This mirrors the general rule in I.C.5.b.4: medical conditions due to substance use are coded to the medical condition plus the F-code, not forced into an “induced disorder” slot.

• Cannabis-induced psychotic disorder (F12.x50/x51/x59) — acute psychosis attributed to cannabis, increasingly documented with high-potency concentrate use. If psychosis persists beyond intoxication and the provider reclassifies it as a primary psychotic disorder, the code moves out of F12 entirely.
• Cannabis-induced anxiety disorder (F12.180 / F12.280 / F12.980) — anxiety attributed to cannabis rather than co-occurring.

Documentation requirements and chart shorthand

For each code group, the minimum record: a provider diagnostic statement naming cannabis and the pattern (or DSM severity grade); explicit remission language for -.11/-.21/-.91; documented withdrawal symptoms and timeline for the -.x3 codes; and for induced disorders, the causal attribution in the provider’s own words.

Billing and medical necessity

Cannabis-primary claims draw more payer scrutiny than any other SUD family — especially cannabis-only residential admissions, where reviewers routinely question whether a 24-hour setting is necessary for a substance without medically dangerous withdrawal. What helps claims survive:

Co-occurring reality: cannabis is frequently the second code on the claim — F12.2x alongside alcohol or stimulant codes. Each substance is coded separately; the hierarchy rule only collapses codes within a substance. For denial-side troubleshooting see denial codes in addiction & mental health billing and behavioral health RCM.

Treatment planning for cannabis-related diagnoses

Cannabis treatment plans — particularly adolescent ones — succeed on functional goals, because motivation is usually externally driven (parents, school, probation). Tie plan objectives to the documented diagnosis and to measurable function: school attendance, family-conflict reduction, negative-screen streaks framed as recovery milestones rather than surveillance.

A fictional example: a 17-year-old enters adolescent IOP with F12.20 (severe CUD per DSM-5-TR criteria count documented by the evaluating clinician) after a school suspension; goals include 3× weekly group attendance, family-therapy participation ( 90847 ), and a graduated school-re-entry plan; at 90 days the provider documents moderate CUD in early remission — F12.21 — and the plan steps down to weekly outpatient.

Templates and goal frameworks in our treatment plan guide.

More ICD-10 resources

Codes verified against the FY2026 ICD-10-CM tabular list (effective October 1, 2025). Reviewed against each annual ICD-10-CM update.

Adolescent program or adult SUD facility, the chart-to-claim chain is the same: ’s EHR keeps diagnosis, treatment plan, and billing in one system — request a demo.

Reference tables

Common questions

Official sources

• CDC/NCHScdc.gov
• CMScms.gov
• ICD-10-CM Official Guidelines FY2026ftp.cdc.gov