ICD-9-CM diagnosis code (retired)
278.03 — Obesity hypoventilation syndrome
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 278.03
278.03 is an ICD-9-CM diagnosis code for obesity hypoventilation syndrome. 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, E66.2 (Morbid (severe) obesity with alveolar hypoventilation). The match is exact.
ICD-10-CM equivalents
- E66.2Morbid (severe) obesity with alveolar hypoventilationexact match
Common questions about 278.03
What is the ICD-10 code for ICD-9 278.03?
- The GEMs map 278.03 to ICD-10-CM E66.2.
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.