Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes M00-M99 – Diseases of the musculoskeletal system and connective tissue (M00-M99) > 2024 ICD-10-CM Codes M65-M67 – Disorders of synovium and tendon (M65-M67) > 2024 ICD-10-CM Codes M66 – Spontaneous rupture of synovium and tendon (M66) > 2024 ICD-10-CM Codes M66.3 – Spontaneous rupture of flexor tendons (M66.3) > 2024 ICD-10-CM Codes M66.37 – Spontaneous rupture of flexor tendons, ankle and foot (M66.37)