2026 ICD-10-CM Diagnosis Code F12.91Cannabis use, unspecified, in remission

ICD-10-CM Codes›F01–F99›F10-F19›F12

ICD-10-CM F12.91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F12.91 is a billable ICD-10-CM diagnosis code for cannabis use, unspecified, in remission. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 894 through 897. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Mental and substance use disorders in remission.

Code Identity

ICD-10-CM Code
F12.91
Billable Status
Yes — Valid for Submission
Code Describes
Cannabis use, unspecified, in remission
Short Description
Cannabis use, unspecified, in remission
Same as the full description in the CMS dataset.
Parent Code
F12.9
Cannabis use, unspecified

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF10-F19Mental and behavioral disorders due to psychoactive substance use
CategoryF12Cannabis related disorders
This CodeF12.91Cannabis use, unspecified, in remission

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Use(of)
      • cannabis
        • in remission

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD026
Mental and substance use disorders in remission
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Marijuana

Marijuana is a green, brown, or gray mix of dried, crumbled parts from the marijuana plant. The plant contains chemicals which act on your brain and can change your mood or consciousness.

The full article covers:

  • What is marijuana?
  • How do people use marijuana?
  • What are the effects of marijuana?
  • Can you overdose on marijuana?
  • Is marijuana addictive?
  • What is medical marijuana?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement F12.91 replaces the following previously assigned code(s):

  • F12.90 - Cannabis use, unspecified, uncomplicated
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F12.91Overview

Is F12.91 (Cannabis use, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cannabis use, unspecified, in remission on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F12.91 group to?

When cannabis use, unspecified, in remission is the principal diagnosis on an inpatient stay, it groups to MS-DRG 894, 895, 896, 897, with relative weights from 0.6169 to 1.7451 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.