B05.1 Measles complicated by meningitis

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

Applicable to

• Postmeasles meningitis

Applies from B05 Measles

Includes

• morbilli

Excludes1 (never code together)

• subacute sclerosing panencephalitis (A81.1)

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 055.79 Measles with other specified complications (approximate)

Code annotations containing back-references to B05.1

Back-references to B05.1

• Type 1 Excludes: A87 Viral meningitis ("meningitis due to measles virus (B05.1)")
• Type 1 Excludes: G02 Meningitis in other infectious and parasitic diseases classified elsewhere ("measles complicated by meningitis (B05.1)")
• Type 1 Excludes: G04.01 Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM) ("post measles myelitis (B05.1)")

Back-references to B05

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B05.1

• Measles (black) (hemorrhagic) (suppressed) › 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) › measles
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › postmeasles

Nearby codes

• B05 Measles
• B05.0 Measles complicated by encephalitis
• B05.1 Measles complicated by meningitis (this code)
• B05.2 Measles complicated by pneumonia
• B05.3 Measles complicated by otitis media
• B05.4 Measles with intestinal complications
• B05.8 Measles with other complications
• B05.81 Measles keratitis and keratoconjunctivitis