M20-M25 — Other joint disorders
ICD-10-CM codes M20-M25 cover other joint disorders, within diseases of the musculoskeletal system and connective tissue. The block holds 963 codes across 6 categories, of which 719 are billable and 244 are header codes that cannot be submitted on a claim.
What else to watch in M20-M25
- 452 codes are laterality-specific. They come in left and right pairs, and the pair is mutually exclusive on a single site: coding both without a bilateral code is a contradiction a scrubber should catch before the payer does.
- 719 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.