Excludes1 pair
G01 vs G05-
G01 and G05 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 G01
meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere (G05)
G01
Meningitis in bacterial diseases classified elsewhere
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G00-G09
Indexed under
- Meningitis › in › bacterial disease NEC
G05
Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
Not billable
- Chapter 6
- Diseases of the nervous system
- Section
- G00-G09
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