Excludes1 pair
M50- vs M54.2
M50 and M54.2 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on M54.2
cervicalgia due to intervertebral cervical disc disorder (M50.-)
M50
Cervical disc disorders
Not billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M50-M54
Use when the record says
- cervicothoracic disc disorders with cervicalgia
- cervicothoracic disc disorders
M54.2
Cervicalgia
Billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M50-M54
Indexed under
- Cervicalgia
- Pain › neck NEC
- Pain › spine › cervical
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