ICD-9-CM diagnosis code (retired)
799.55 — Frontal lobe and executive function deficit
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 799.55
799.55 is an ICD-9-CM diagnosis code for frontal lobe and executive function deficit. 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, R41.844 (Frontal lobe and executive function deficit). The match is exact.
ICD-10-CM equivalents
- R41.844Frontal lobe and executive function deficitexact match
Common questions about 799.55
What is the ICD-10 code for ICD-9 799.55?
- The GEMs map 799.55 to ICD-10-CM R41.844.
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.