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ICD-10-CM 2027 diagnosis code

F16Hallucinogen related disorders

Not billable — use a more specific code

F16 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F16

F16 is the ICD-10-CM diagnosis code for hallucinogen related disorders. It belongs to block F10-F19 (mental and behavioral disorders due to psychoactive substance use) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: F16.1 (abuse), F16.2 (dependence) and F16.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under F16

Coding notes

IncludesFurther defines the content of the category
  • ecstasy
  • PCP
  • phencyclidine

Notes that apply from higher levels

Instructions written at a parent level also apply to F16.

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Codes whose notes reference F16

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F16

Is F16 billable?

No. F16 is a header code. Report one of its more specific subcodes instead.