Excludes1 pair

B37.5 vs G02

B37.5 and G02 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 G02
candidal meningitis (B37.5)
B37.5

Candidal meningitis

Billable
Chapter 1
Certain infectious and parasitic diseases
Section
B35-B49
Indexed under
  • Candidiasis, candidal › meningitis
  • Meningitis › candidal
  • Meningitis › monilial
G02

Meningitis in other infectious and parasitic diseases classified elsewhere

Billable
Chapter 6
Diseases of the nervous system
Section
G00-G09
Indexed under
  • Exanthem, exanthema › epidemic with meningitis
  • Meningitis › mycotic NEC
  • Meningitis › poliovirus
  • Meningitis › in › African trypanosomiasis
  • Meningitis › in › parasitic disease NEC

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