ICD-10-CM › F01-F99 › F70-F79 › F codes › F79

F79

Unspecified intellectual disabilities

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2007 Added to the draft code set draft Unspecified mental retardation
  2. FY2012 Draft description revised draft Unspecified mental retardation Unspecified intellectual disabilities

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Also known as

  • Mental deficiency NOS
  • Mental subnormality NOS

Inherited from the F70-F79 section Intellectual Disabilities (F70-F79)

Excludes1 - never coded here

  • borderline intellectual functioning, IQ above 70 to 84 (R41.83)

Code first

  • any associated physical or developmental disorders

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.