A51.49 Other secondary syphilitic conditions

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

Applicable to

• Secondary syphilitic lymphadenopathy
• Secondary syphilitic myositis

MS-DRG index

Defines the logic of DRG(s) 867-869 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 091.4 Adenopathy due to secondary syphilis (approximate)
• 091.69 Secondary syphilis of other viscera (approximate)
• 091.7 Secondary syphilis, relapse (approximate)
• 091.89 Other forms of secondary syphilis (approximate)

Code annotations containing back-references to A51.49

Back-references to A51.49

• Type 1 Excludes: M63 Disorders of muscle in diseases classified elsewhere ("myopathy in secondary syphilis (A51.49)")

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 A51.49

• Adenopathy (lymph gland) › syphilitic (secondary)
• Lymphadenitis › syphilitic (early) (secondary)
• Lymphadenopathy (generalized) › syphilitic (early) (secondary)
• Myositis › in (due to) › syphilis › secondary
• Syphilis, syphilitic (acquired) › adenopathy (secondary)
• Syphilis, syphilitic (acquired) › early › symptomatic › secondary › relapse (treated, untreated)
• Syphilis, syphilitic (acquired) › lymph gland (early) (secondary)
• Syphilis, syphilitic (acquired) › lymphadenitis (secondary)
• Syphilis, syphilitic (acquired) › secondary (and primary)
• Syphilis, syphilitic (acquired) › secondary (and primary) › adenopathy
• Syphilis, syphilitic (acquired) › secondary (and primary) › lymphadenitis
• Syphilis, syphilitic (acquired) › secondary (and primary) › relapse (treated, untreated)
• Syphilis, syphilitic (acquired) › secondary (and primary) › specified form NEC
• Syphilis, syphilitic (acquired) › secondary (and primary) › viscera NEC
• Syphilis, syphilitic (acquired) › viscera (abdominal) (late) › secondary

Nearby codes

• 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
• A51.49 Other secondary syphilitic conditions (this code)
• A51.5 Early syphilis, latent
• A51.9 Early syphilis, unspecified