M66.35
Non-billableSpontaneous rupture of flexor tendons, thigh
M66.35 is the ICD-10-CM code for Spontaneous rupture of flexor tendons, thigh. It is a non-billable category code — use a more specific child code such as M66.351 for billing.
M00-M99 Diseases of the musculoskeletal system and connective tissue
What this means — in plain language
MedlinePlus · NIHYour legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains , joint dislocations , and fractures (broken bones). These injuries can affect the entire leg, or just the foot , ankle , knee , or hip . Certain diseases also lead…
Read more about Leg Injuries and Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition