2027 ICD-10-CM Diagnosis Code F12.91Cannabis use, unspecified, in remission
ICD-10-CM Codes›F01–F99›F10-F19›F12
- Billable — Valid for Submission
- Not Chronic
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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 894 through 897. Coders also document this condition as ex-cannabis user. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Mental and substance use disorders in remission.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Ex-cannabis user
- Misused drugs in past
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F12.91: its own notes plus those printed at F12.9, F12, and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- marijuana
- disorders of psychological development
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F12.91, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming F12.91: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
in remission F12.91
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Cannabis
Cannabis, also known as marijuana, is a green, brown, or gray mixture of dried parts from the cannabis plant. The plant contains chemicals that affect the brain and can change how you feel or think.
The full article covers:
- What is cannabis?
- How do people use cannabis?
- What are the effects of cannabis?
- Can you overdose on cannabis?
- Is cannabis addictive?
- What is medical cannabis?
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
Questions About F12.91Overview
What is the ICD-10 code for cannabis use, unspecified, in remission?
The ICD-10-CM code for cannabis use, unspecified, in remission is F12.91 (sometimes written as F1291). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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, 897, 895, 896, with relative weights from 0.6272 to 1.6610 depending on complications. Higher weights mean higher Medicare reimbursement.
Can F12.91 be reported with a code from F12.1?
Not as a rule. The Excludes1 note at F12.9, which applies to F12.91, lists "cannabis abuse (F12.1-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
