A51.41 Secondary syphilitic meningitis

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)

• 091.81 Acute syphilitic meningitis (secondary) (approximate)

Code annotations containing back-references to A51.41

Back-references to A51

• Type 2 Excludes: N34 Urethritis and urethral syndrome ("urethritis in diseases with a predominantly sexual mode of transmission (A50-A64)")

Diagnosis Index entries for A51.41

• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › syphilitic (late) (tertiary) › acute
• Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › syphilitic (late) (tertiary) › secondary
• Syphilis, syphilitic (acquired) › meningitis › acute (secondary)
• Syphilis, syphilitic (acquired) › secondary (and primary) › meningitis (acute)

Nearby codes

• A51.3 Secondary syphilis of skin and mucous membranes
• A51.31 Condyloma latum
• A51.32 Syphilitic alopecia
• A51.39 Other secondary syphilis of skin
• A51.4 Other secondary syphilis
• A51.41 Secondary syphilitic meningitis (this code)
• A51.42 Secondary syphilitic female pelvic disease
• A51.43 Secondary syphilitic oculopathy
• A51.44 Secondary syphilitic nephritis
• A51.45 Secondary syphilitic hepatitis
• A51.46 Secondary syphilitic osteopathy