ICD-9-CM diagnosis code (retired)
999.84 — Acute hemolytic transfusion reaction, incompatibility unspecified
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 999.84
999.84 is an ICD-9-CM diagnosis code for acute hemolytic transfusion reaction, incompatibility unspecified. 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, T80.910A (Acute hemolytic transfusion reaction, unspecified incompatibility, initial encounter). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- T80.910AAcute hemolytic transfusion reaction, unspecified incompatibility, initial encounterapproximate
Common questions about 999.84
What is the ICD-10 code for ICD-9 999.84?
- The GEMs map 999.84 to ICD-10-CM T80.910A.
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.