G98.0 vs M49
G98.0 and M49 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 M49
nonsyphilitic neuropathic spondylopathy NEC (G98.0)
G98.0
Neurogenic arthritis, not elsewhere classified
BillableUnspecified
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
Use when the record says
- Nonsyphilitic neurogenic arthropathy NEC
- Nonsyphilitic neurogenic spondylopathy NEC
Indexed under
- Arthritis, arthritic › in › neurological disorder NEC (acute) (chronic) (nonpyogenic) (subacute)
- Arthritis, arthritic › neuropathic › nonsyphilitic NEC (acute) (chronic) (nonpyogenic) (subacute)
- Arthropathy › neuropathic › nonsyphilitic NEC
M49
Spondylopathies in diseases classified elsewhere
Not billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M45-M49
Use when the record says
- curvature of spine in diseases classified elsewhere
- deformity of spine in diseases classified elsewhere
- kyphosis in diseases classified elsewhere
- scoliosis in diseases classified elsewhere
- spondylopathy in diseases classified elsewhere
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