ICD-9-CM diagnosis code (retired)
738.5 — Other acquired deformity of back or spine
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 738.5
738.5 is an ICD-9-CM diagnosis code for other acquired deformity of back or spine. 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 2 ICD-10-CM codes, such as M99.83 (Other biomechanical lesions of lumbar region) and M99.84 (Other biomechanical lesions of sacral region). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 738.5
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.