G01 Meningitis in bacterial 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)

• meningitis (in):
• gonococcal (A54.81)
• leptospirosis (A27.81)
• listeriosis (A32.11)
• Lyme disease (A69.21)
• meningococcal (A39.0)
• neurosyphilis (A52.13)
• tuberculosis (A17.0)
• meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere (G05)

Code first

• underlying disease

Applies from G01 Meningitis in bacterial diseases classified elsewhere

Excludes1 (never code together)

• meningitis (in):
• gonococcal (A54.81)
• leptospirosis (A27.81)
• listeriosis (A32.11)
• Lyme disease (A69.21)
• meningococcal (A39.0)
• neurosyphilis (A52.13)
• tuberculosis (A17.0)
• meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere (G05)

Code first

• underlying disease

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 320.7 Meningitis in other bacterial diseases classified elsewhere

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.

Diagnosis Index entries for G01

• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › in (due to) › bacterial disease NEC

Nearby codes

• G01 Meningitis in bacterial diseases classified elsewhere (this code)