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ICD-10-CM 2027 diagnosis code

F78Other intellectual disabilities

Not billable — use a more specific code

F78 is a header code, so it can't be reported by itself. Choose one of the 1 more specific codes beneath it.

Code last changed in FY2022 (effective October 1, 2021). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F78

F78 is the ICD-10-CM diagnosis code for other intellectual disabilities. It belongs to block F70-F79 (intellectual Disabilities) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: F78.A (disabilities).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2022 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 319 (unspecified intellectual disabilities).

Specific codes under F78

Notes that apply from higher levels

Instructions written at a parent level also apply to F78.

Broader instructions also apply from F70-F79 Intellectual Disabilities and Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

ICD-9-CM equivalent

Converter →
  • 319Unspecified intellectual disabilitiesapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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)
  • FY2022 (effective 10/1/2021): Expanded — no longer billable

Common questions about F78

Is F78 billable?

No. F78 is a header code. Report one of its more specific subcodes instead.

What is the ICD-9 code for F78?

The CMS General Equivalence Mappings map F78 to ICD-9-CM 319.