M23.639Billable
Other spontaneous disruption of medial collateral ligament of unspecified knee
Short description: Oth spon disruption of medial collat ligament of unsp knee
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M23
- Effective date
- October 1, 2026
Related codes in category M23
M23Internal derangement of kneeM23.0Cystic meniscusM23.00Cystic meniscus, unspecified meniscusM23.000Cystic meniscus, unspecified lateral meniscus, right kneeYesM23.001Cystic meniscus, unspecified lateral meniscus, left kneeYesM23.002Cystic meniscus, unsp lateral meniscus, unspecified kneeYesM23.003Cystic meniscus, unspecified medial meniscus, right kneeYesM23.004Cystic meniscus, unspecified medial meniscus, left kneeYesM23.005Cystic meniscus, unsp medial meniscus, unspecified kneeYesM23.006Cystic meniscus, unspecified meniscus, right kneeYesM23.007Cystic meniscus, unspecified meniscus, left kneeYesM23.009Cystic meniscus, unspecified meniscus, unspecified kneeYes
Frequently asked questions
What is ICD-10 code M23.639?
M23.639 is an ICD-10-CM diagnosis code for Other spontaneous disruption of medial collateral ligament of unspecified knee.
Is M23.639 a billable code?
Yes. M23.639 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M23.639 in?
M23.639 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M23.639 become effective?
M23.639 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M23.639?
M23.639 belongs to category M23, 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.