M62.2 vs T79.6
M62.2 and T79.6 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on M62.2
traumatic ischemia of muscle (T79.6)
M62.2
Nontraumatic ischemic infarction of muscle
Not billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M60-M63
T79.6
Traumatic ischemia of muscle
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- T79
Use when the record says
- Traumatic rhabdomyolysis
- Volkmann's ischemic contracture
Indexed under
- Volkmann's ischemic contracture or paralysis (complicating trauma)
- Contraction, contracture, contracted › Volkmann's (s)
- Disease, diseased › Volkmann's, acquired
- Ischemia, ischemic › muscle, traumatic
- Myositis › fibrosa or fibrous, Volkmann's
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027