ICD-9-CM diagnosis code (retired)
733.3 — Hyperostosis of skull
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 733.3
733.3 is an ICD-9-CM diagnosis code for hyperostosis of skull. 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, M85.2 (Hyperostosis of skull). The match is exact.
ICD-10-CM equivalents
- M85.2Hyperostosis of skullexact match
Common questions about 733.3
What is the ICD-10 code for ICD-9 733.3?
- The GEMs map 733.3 to ICD-10-CM M85.2.
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.