2026 ICD-10-CM Diagnosis Code F16.183Hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks)

ICD-10-CM Codes›F01–F99›F10-F19›F16

ICD-10-CM F16.183
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F16.183 is a billable ICD-10-CM diagnosis code for hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks). 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 Hallucinogen-related disorders.

Code Identity

ICD-10-CM Code
F16.183
Billable Status
Yes — Valid for Submission
Code Describes
Hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks)
Short Description
Hallucign abuse w hallucign persisting perception disorder
Parent Code
F16.18
Hallucinogen abuse with other hallucinogen-induced disorder

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF10-F19Mental and behavioral disorders due to psychoactive substance use
CategoryF16Hallucinogen related disorders
This CodeF16.183Hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks)

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
          • with
            • flashbacks
    • Abuse
      • drug NEC (non-dependent)
        • hallucinogen
          • with
            • perception disorder, persisting
    • Disorder(of)
      • perception, due to hallucinogens
        • in
          • abuse
    • Disorder(of)
      • posthallucinogen perception
        • in
          • abuse

Clinical ClassificationClinical

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

CCSR MBD022
Hallucinogen-related disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Drug Use and Addiction

Drugs are chemical substances that can change how your body and mind work. They include prescription medicines, over-the-counter medicines, alcohol, tobacco, and illegal drugs.

The full article covers:

  • What are drugs?
  • What is drug use?
  • What is drug addiction?
  • Does everyone who takes drugs become addicted?
  • Who is at risk for drug addiction?
  • What are the signs that someone has a drug problem?
  • What are the treatments for drug addiction?
  • Can drug use and addiction be prevented?

Read the full article at MedlinePlus

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

Convert F16.183 to ICD-9-CMHistory

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

ICD-9-CM
292.89 Drug mental disorder NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F16.183Overview

Is F16.183 (Hallucinogen abuse with other hallucinogen-induced disorder) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F16.183 group to?

When hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks) 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 F16.183?

Under the General Equivalence Mappings, hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks) converts to ICD-9-CM 292.89 (drug mental disorder NEC). The mapping is approximate, so confirm the match fits the documentation.

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.