ICD-9-CM diagnosis code (retired)
525.21 — Minimal atrophy of the mandible
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 525.21
525.21 is an ICD-9-CM diagnosis code for minimal atrophy of the mandible. 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, K08.21 (Minimal atrophy of the mandible). The match is exact.
ICD-10-CM equivalents
- K08.21Minimal atrophy of the mandibleexact match
Common questions about 525.21
What is the ICD-10 code for ICD-9 525.21?
- The GEMs map 525.21 to ICD-10-CM K08.21.
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.