ICD-9-CM diagnosis code (retired)
484.3 — Pneumonia in whooping cough
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 484.3
484.3 is an ICD-9-CM diagnosis code for pneumonia in whooping cough. 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, A37.91 (Whooping cough, unspecified species with pneumonia). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- A37.91Whooping cough, unspecified species with pneumoniaapproximate
Common questions about 484.3
What is the ICD-10 code for ICD-9 484.3?
- The GEMs map 484.3 to ICD-10-CM A37.91.
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.