ICD-9-CM diagnosis code (retired)
318.1 — Severe intellectual disabilities
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 318.1
318.1 is an ICD-9-CM diagnosis code for severe intellectual disabilities. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, F72 (Severe intellectual disabilities). The match is exact.
ICD-10-CM equivalents
- F72Severe intellectual disabilitiesexact match
Common questions about 318.1
What is the ICD-10 code for ICD-9 318.1?
- The GEMs map 318.1 to ICD-10-CM F72.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.