ICD-9-CM diagnosis code (retired)
736.81 — Unequal leg length (acquired)
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 736.81
736.81 is an ICD-9-CM diagnosis code for unequal leg length (acquired). 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 M21.759 (Unequal limb length (acquired), unspecified femur) and M21.769 (Unequal limb length (acquired), unspecified tibia and fibula). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 736.81
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.