A87.9 Viral meningitis, unspecified

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

Applies from A87 Viral meningitis

Excludes1 (never code together)

• meningitis due to herpesvirus [herpes simplex] (B00.3)
• meningitis due to herpesvirus [herpes simplex] (B00.3)
• meningitis due to measles virus (B05.1)
• meningitis due to mumps virus (B26.1)
• meningitis due to poliomyelitis virus (A80.-)
• meningitis due to zoster (B02.1)

MS-DRG index

Defines the logic of DRG(s) 075-076 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 047.9 Unspecified viral meningitis (approximate)

Code annotations containing back-references to A87.9

Back-references to A87.9

• Type 1 Excludes: A88 Other viral infections of central nervous system, not elsewhere classified ("viral meningitis NOS (A87.9)")

Diagnosis Index entries for A87.9

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

Nearby codes

• A87 Viral meningitis
• A87.0 Enteroviral meningitis
• A87.1 Adenoviral meningitis
• A87.2 Lymphocytic choriomeningitis
• A87.8 Other viral meningitis
• A87.9 Viral meningitis, unspecified (this code)