G98.0 vs M49-
G98.0 and M49 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.
Neurogenic arthritis, not elsewhere classified
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
- Nonsyphilitic neurogenic arthropathy NEC
- Nonsyphilitic neurogenic spondylopathy NEC
- Arthritis, arthritic › in › neurological disorder NEC
- Arthritis, arthritic › neuropathic › nonsyphilitic NEC
- Arthropathy › neuropathic › nonsyphilitic NEC
Spondylopathies in diseases classified elsewhere
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M45-M49
- 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