ICD-9-CM diagnosis code (retired)
727.66 — Nontraumatic rupture of patellar tendon
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 727.66
727.66 is an ICD-9-CM diagnosis code for nontraumatic rupture of patellar tendon. 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, M66.269 (Spontaneous rupture of extensor tendons, unspecified lower leg). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- M66.269Spontaneous rupture of extensor tendons, unspecified lower legapproximate
Common questions about 727.66
What is the ICD-10 code for ICD-9 727.66?
- The GEMs map 727.66 to ICD-10-CM M66.269.
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.