M50 vs S13.0
M50 and S13.0 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 S13.0
rupture or displacement (nontraumatic) of cervical intervertebral disc NOS (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
S13.0
Traumatic rupture of cervical intervertebral disc
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- S10-S19
Indexed under
- Rupture, ruptured › traumatic › intervertebral disc › cervical
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