M25.661Billable
Stiffness of right knee, not elsewhere classified
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M25
- Effective date
- October 1, 2026
Related codes in category M25
M25Other joint disorder, not elsewhere classifiedM25.0HemarthrosisM25.00Hemarthrosis, unspecified jointYesM25.01Hemarthrosis, shoulderM25.011Hemarthrosis, right shoulderYesM25.012Hemarthrosis, left shoulderYesM25.019Hemarthrosis, unspecified shoulderYesM25.02Hemarthrosis, elbowM25.021Hemarthrosis, right elbowYesM25.022Hemarthrosis, left elbowYesM25.029Hemarthrosis, unspecified elbowYesM25.03Hemarthrosis, wrist
Frequently asked questions
What is ICD-10 code M25.661?
M25.661 is an ICD-10-CM diagnosis code for Stiffness of right knee, not elsewhere classified.
Is M25.661 a billable code?
Yes. M25.661 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M25.661 in?
M25.661 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M25.661 become effective?
M25.661 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M25.661?
M25.661 belongs to category M25, 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.