G01 vs G05
G01 and G05 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 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 (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
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