M70-M79 — Other soft tissue disorders
ICD-10-CM codes M70-M79 cover other soft tissue disorders, within diseases of the musculoskeletal system and connective tissue. The block holds 477 codes across 7 categories, of which 356 are billable and 121 are header codes that cannot be submitted on a claim.
Risk adjustment in M70-M79
0 codes in this block map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded. Under-coding here is money left on the table; over-coding here is what audits are for.
- HCC 92 Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis
What else to watch in M70-M79
- 204 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.
- 356 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.