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ICD-10 Code M23.639 - Other spontaneous disruption of medial collateral ligament of unspecified knee

Reviewed by Medicinsk Expert•Last updated: 2026-10-22•ICD Codes

ICD-10-CM Diagnosis Code M23.639

Diagnosis Code: M23.639 (Raw: M23639)

Description: Other spontaneous disruption of medial collateral ligament of unspecified knee

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code M23.639 is designated for Other spontaneous disruption of medial collateral ligament of unspecified knee. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.

Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.