ICD-9-CM diagnosis code (retired)
277.6 — Other deficiencies of circulating enzymes
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 277.6
277.6 is an ICD-9-CM diagnosis code for other deficiencies of circulating enzymes. 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, D84.1 (Defects in the complement system). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- D84.1Defects in the complement systemapproximate
Common questions about 277.6
What is the ICD-10 code for ICD-9 277.6?
- The GEMs map 277.6 to ICD-10-CM D84.1.
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.