2027 ICD-10-CM Diagnosis Code F16.90Hallucinogen use, unspecified, uncomplicated

ICD-10-CM Codes›F01–F99›F10-F19›F16

ICD-10-CM F16.90
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F16.90 is a billable ICD-10-CM diagnosis code for hallucinogen use, unspecified, uncomplicated. 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 hallucinogen use disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hallucinogen-related disorders.

Code Identity

ICD-10-CM Code
F16.90
Billable Status
Yes — Valid for Submission
Code Describes
Hallucinogen use, unspecified, uncomplicated
Short Description
Hallucinogen use, unspecified, uncomplicated
Same as the full description in the CMS dataset.
Parent Code
F16.9
Hallucinogen use, unspecified

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF10-F19Mental and behavioral disorders due to psychoactive substance use
CategoryF16Hallucinogen related disorders
This CodeF16.90Hallucinogen use, unspecified, uncomplicated

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hallucinogen use disorder
  • Ketamine use disorder
  • Phencyclidine use disorder
  • Use of psilocybin

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F16.90: its own notes plus those printed at F16.9, F16, 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.

From F16 Hallucinogen related disorders applies to 40 codes
  • ecstasy
  • PCP
  • phencyclidine
From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From F16.9 Hallucinogen use, unspecified applies to 13 codes

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.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F16.90, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming F16.90: they are not reported together with it, unless the two conditions are unrelated.

  • F16.1 Hallucinogen abuse
    hallucinogen use, unspecified (F16.9-) names F16.9-, which includes this code
  • F16.2 Hallucinogen dependence
    hallucinogen use, unspecified (F16.9-) names F16.9-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 F16.90 to ICD-9-CMHistory

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

ICD-9-CM
305.30 Hallucinog abuse-unspec
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F16.90Overview

What is the ICD-10 code for hallucinogen use, unspecified, uncomplicated?

The ICD-10-CM code for hallucinogen use, unspecified, uncomplicated is F16.90 (sometimes written as F1690). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is F16.90 (Hallucinogen use, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hallucinogen use, unspecified, uncomplicated on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F16.90 group to?

When hallucinogen use, unspecified, uncomplicated 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 F16.90 be reported with a code from F16.1?

Not as a rule. The Excludes1 note at F16.9, which applies to F16.90, lists "hallucinogen abuse (F16.1-)". 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).

What is the ICD-9 equivalent of F16.90?

Under the General Equivalence Mappings, hallucinogen use, unspecified, uncomplicated converts to ICD-9-CM 305.30 (hallucinog abuse-unspec). The mapping is approximate, so confirm the match fits the documentation.