A39.81 Meningococcal encephalitis

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

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 036.1 Meningococcal encephalitis

Code annotations containing back-references to A39.81

Back-references to A39.81

• Type 1 Excludes: G05 Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere ("meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)")

Diagnosis Index entries for A39.81

• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › meningococcal
• Infection, infected, infective (opportunistic) › meningococcal › brain
• Meningoencephalitis › epidemic
• Meningomyelitis › meningococcal

Nearby codes

• A39.50 Meningococcal carditis, unspecified
• A39.51 Meningococcal endocarditis
• A39.52 Meningococcal myocarditis
• A39.53 Meningococcal pericarditis
• A39.8 Other meningococcal infections
• A39.81 Meningococcal encephalitis (this code)
• A39.82 Meningococcal retrobulbar neuritis
• A39.83 Meningococcal arthritis
• A39.84 Postmeningococcal arthritis
• A39.89 Other meningococcal infections
• A39.9 Meningococcal infection, unspecified