M66.331Billable
Spontaneous rupture of flexor tendons, right forearm
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M66
- Effective date
- October 1, 2026
Related codes in category M66
M66Spontaneous rupture of synovium and tendonM66.0Rupture of popliteal cystYesM66.1Rupture of synoviumM66.10Rupture of synovium, unspecified jointYesM66.11Rupture of synovium, shoulderM66.111Rupture of synovium, right shoulderYesM66.112Rupture of synovium, left shoulderYesM66.119Rupture of synovium, unspecified shoulderYesM66.12Rupture of synovium, elbowM66.121Rupture of synovium, right elbowYesM66.122Rupture of synovium, left elbowYesM66.129Rupture of synovium, unspecified elbowYes
Frequently asked questions
What is ICD-10 code M66.331?
M66.331 is an ICD-10-CM diagnosis code for Spontaneous rupture of flexor tendons, right forearm.
Is M66.331 a billable code?
Yes. M66.331 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M66.331 in?
M66.331 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M66.331 become effective?
M66.331 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M66.331?
M66.331 belongs to category M66, 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.