ICD-9-CM diagnosis code (retired)
279.05 — Immunodeficiency with increased IgM
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 279.05
279.05 is an ICD-9-CM diagnosis code for immunodeficiency with increased IgM. 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, D80.5 (Immunodeficiency with increased immunoglobulin M [IgM]). The match is exact.
ICD-10-CM equivalents
- D80.5Immunodeficiency with increased immunoglobulin M [IgM]exact match
Common questions about 279.05
What is the ICD-10 code for ICD-9 279.05?
- The GEMs map 279.05 to ICD-10-CM D80.5.
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.