2026 ICD-10-CM Diagnosis Code F16.11Hallucinogen abuse, in remission

ICD-10-CM Codes›F01–F99›F10-F19›F16

ICD-10-CM F16.11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F16.11 is a billable ICD-10-CM diagnosis code for hallucinogen abuse, 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. Coders also document this condition as history of hallucinogen abuse. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Mental and substance use disorders in remission.

Code Identity

ICD-10-CM Code
F16.11
Billable Status
Yes — Valid for Submission
Code Describes
Hallucinogen abuse, in remission
Short Description
Hallucinogen abuse, in remission
Same as the full description in the CMS dataset.
Parent Code
F16.1
Hallucinogen abuse

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF10-F19Mental and behavioral disorders due to psychoactive substance use
CategoryF16Hallucinogen related disorders
This CodeF16.11Hallucinogen abuse, in remission

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • History of hallucinogen abuse

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Other hallucinogen use disorder, mild, in early remission
  • Other hallucinogen use disorder, mild, in sustained remission
  • Phencyclidine use disorder, mild, in early remission
  • Phencyclidine use disorder, mild, in sustained 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.

    • Abuse
      • drug NEC (non-dependent)
        • hallucinogen
          • in remission (early) (sustained)
    • Disorder(of)
      • hallucinogen use
        • mild
          • in remission (early) (sustained)
    • Disorder(of)
      • phencyclidine use
        • mild
          • in remission (early) (sustained)

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

Convert F16.11 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
305.33 Hallucinog abuse-remiss
Exact Match The mapping is direct, with no qualifiers.

Code History & ChangesHistory

Replacement F16.11 replaces the following previously assigned code(s):

  • F16.10 - Hallucinogen abuse, uncomplicated
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F16.11Overview

Is F16.11 (Hallucinogen abuse) a billable code?

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

What MS-DRG does F16.11 group to?

When hallucinogen abuse, 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.

What is the ICD-9 equivalent of F16.11?

Under the General Equivalence Mappings, hallucinogen abuse, in remission converts to ICD-9-CM 305.33 (hallucinog abuse-remiss). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.