ICD-9-CM diagnosis code (retired)
727.51 — Synovial cyst of popliteal space
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 727.51
727.51 is an ICD-9-CM diagnosis code for Synovial cyst of popliteal space. 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, M71.20 (Synovial cyst of popliteal space [Baker], unspecified knee). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- M71.20Synovial cyst of popliteal space [Baker], unspecified kneeapproximate
Common questions about 727.51
What is the ICD-10 code for ICD-9 727.51?
- The GEMs map 727.51 to ICD-10-CM M71.20.
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.