G02 Meningitis in other infectious and parasitic diseases classified elsewhere

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Excludes1 (never code together)

• candidal meningitis (B37.5)
• coccidioidomycosis meningitis (B38.4)
• cryptococcal meningitis (B45.1)
• herpesviral [herpes simplex] meningitis (B00.3)
• infectious mononucleosis complicated by meningitis (B27.- with fifth character 2)
• measles complicated by meningitis (B05.1)
• meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere (G05)
• mumps meningitis (B26.1)
• rubella meningitis (B06.02)
• varicella [chickenpox] meningitis (B01.0)
• zoster meningitis (B02.1)

Code first

• underlying disease, such as:
• African trypanosomiasis (B56.-)
• poliovirus infection (A80.-)

Applies from G02 Meningitis in other infectious and parasitic diseases classified elsewhere

Excludes1 (never code together)

• candidal meningitis (B37.5)
• coccidioidomycosis meningitis (B38.4)
• cryptococcal meningitis (B45.1)
• herpesviral [herpes simplex] meningitis (B00.3)
• infectious mononucleosis complicated by meningitis (B27.- with fifth character 2)
• measles complicated by meningitis (B05.1)
• meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere (G05)
• mumps meningitis (B26.1)
• rubella meningitis (B06.02)
• varicella [chickenpox] meningitis (B01.0)
• zoster meningitis (B02.1)

Code first

• underlying disease, such as:
• African trypanosomiasis (B56.-)
• poliovirus infection (A80.-)

MS-DRG index

Defines the logic of DRG(s) 023-024 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 321.1 Meningitis in other fungal diseases (approximate)
• 321.2 Meningitis due to viruses not elsewhere classified (approximate)
• 321.8 Meningitis due to other nonbacterial organisms classified elsewhere (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to G02

Back-references to G02

• Use Additional: B39 Histoplasmosis ("meningitis (G02)")

Back-references to G02

• Use Additional: B39 Histoplasmosis ("meningitis (G02)")

Diagnosis Index entries for G02

• Exanthem, exanthema › epidemic with meningitis
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › in (due to) › African trypanosomiasis
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › in (due to) › parasitic disease NEC
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › in (due to) › poliovirus
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › mycotic NEC
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › poliovirus

Nearby codes

• G02 Meningitis in other infectious and parasitic diseases classified elsewhere (this code)