M21.6
Non-billableOther acquired deformities of foot
M21.6 is the ICD-10-CM code for Other acquired deformities of foot. It is a non-billable category code — use a more specific child code such as M21.61 for billing.
M00-M99 Diseases of the musculoskeletal system and connective tissue
What this means — in plain language
MedlinePlus · NIHEach of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems: Bunions - hard, painful bumps on the big toe joint Corns and calluses - thickened skin from friction or pressure Plantar warts - warts on the soles of your feet Fallen arches - also called flat feet Ill-fitting shoes often cause these problems. Aging…
Read more about Foot 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.
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