M71.21Billable
Synovial cyst of popliteal space [Baker], right knee
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M71
- Effective date
- October 1, 2026
Related codes in category M71
M71Other bursopathiesM71.0Abscess of bursaM71.00Abscess of bursa, unspecified siteYesM71.01Abscess of bursa, shoulderM71.011Abscess of bursa, right shoulderYesM71.012Abscess of bursa, left shoulderYesM71.019Abscess of bursa, unspecified shoulderYesM71.02Abscess of bursa, elbowM71.021Abscess of bursa, right elbowYesM71.022Abscess of bursa, left elbowYesM71.029Abscess of bursa, unspecified elbowYesM71.03Abscess of bursa, wrist
Frequently asked questions
What is ICD-10 code M71.21?
M71.21 is an ICD-10-CM diagnosis code for Synovial cyst of popliteal space [Baker], right knee.
Is M71.21 a billable code?
Yes. M71.21 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M71.21 in?
M71.21 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M71.21 become effective?
M71.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M71.21?
M71.21 belongs to category M71, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.