M99 — Biomechanical lesions, not elsewhere classified
ICD-10-CM codes M99 cover biomechanical lesions, not elsewhere classified, within diseases of the musculoskeletal system and connective tissue. The block holds 101 codes across 1 category, of which 91 are billable and 10 are header codes that cannot be submitted on a claim.
What else to watch in M99
- 91 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.