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ICD-10-CM 2027 diagnosis code

F06Other mental disorders due to known physiological condition

Not billable — use a more specific code

F06 is a header code, so it can't be reported by itself. Choose one of the 7 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 F06

F06 is the ICD-10-CM diagnosis code for other mental disorders due to known physiological condition. It belongs to block F01-F09 (mental disorders due to known physiological conditions) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: F06.0 (condition), F06.1 (condition), F06.2 (condition), F06.3 (condition), F06.4 (condition), F06.7 (condition) and F06.8 (condition).

Don't report F06 together with the conditions in its Excludes1 note: unspecified dementia (F03.-).

The conditions in its Excludes2 note aren't part of F06, but may be coded alongside it if the patient has both: delirium due to known physiological condition (F05), dementia as classified in F01-F02 and other mental disorders associated with alcohol and other psychoactive substances (F10-F19).

Code first: the underlying physiological condition.

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 F06

Coding notes

IncludesFurther defines the content of the category
  • mental disorders due to endocrine disorder
  • mental disorders due to exogenous hormone
  • mental disorders due to exogenous toxic substance
  • mental disorders due to primary cerebral disease
  • mental disorders due to somatic illness
  • mental disorders due to systemic disease affecting the brain
Excludes1Not coded here — never report together with this code
  • unspecified dementia (F03.-)
Excludes2Not included here — may be reported together if both conditions exist
  • delirium due to known physiological condition (F05)
  • dementia as classified in F01-F02
  • other mental disorders associated with alcohol and other psychoactive substances (F10-F19)
Code firstSequence the underlying condition first
  • the underlying physiological condition

Notes that apply from higher levels

Instructions written at a parent level also apply to F06.

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 F06

Is F06 billable?

No. F06 is a header code. Report one of its more specific subcodes instead.