A50.6 Late congenital syphilis, latent

Billable ICD-10-CM code, FY2026.

Applicable to

• Congenital syphilis without clinical manifestations, with positive serological reaction and negative spinal fluid test, two years or more after birth.

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 090.6 Late congenital syphilis, latent

Code annotations containing back-references to A50.6

Back-references to A50

• Code First: J99 Respiratory disorders in diseases classified elsewhere ("congenital syphilis (A50.-)")
• Type 2 Excludes: N34 Urethritis and urethral syndrome ("urethritis in diseases with a predominantly sexual mode of transmission (A50-A64)")
• Type 2 Excludes: P37 Other congenital infectious and parasitic diseases ("congenital syphilis (A50.-)")

Diagnosis Index entries for A50.6

• Syphilis, syphilitic (acquired) › congenital › late, or 2 years or more after birth NEC › latent (without manifestations)
• Syphilis, syphilitic (acquired) › congenital › late, or 2 years or more after birth NEC › latent (without manifestations) › negative spinal fluid test
• Syphilis, syphilitic (acquired) › congenital › late, or 2 years or more after birth NEC › latent (without manifestations) › serology positive

Nearby codes

• A50.54 Late congenital cardiovascular syphilis
• A50.55 Late congenital syphilitic arthropathy
• A50.56 Late congenital syphilitic osteochondropathy
• A50.57 Syphilitic saddle nose
• A50.59 Other late congenital syphilis, symptomatic
• A50.6 Late congenital syphilis, latent (this code)
• A50.7 Late congenital syphilis, unspecified
• A50.9 Congenital syphilis, unspecified