A50.56 Late congenital syphilitic osteochondropathy

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

Applies from A50.5 Other late congenital syphilis, symptomatic

Applicable to

• Any congenital syphilitic condition specified as late or manifest 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)

• 090.5 Other late congenital syphilis, symptomatic (approximate)

Code annotations containing back-references to A50.56

Back-references to A50.5

• Code First: I52 Other heart disorders in diseases classified elsewhere ("congenital syphilis (A50.5)")
• Type 1 Excludes: K00.2 Abnormalities of size and form of teeth ("abnormalities of teeth due to congenital syphilis (A50.5)")
• Type 1 Excludes: K00.4 Disturbances in tooth formation ("Hutchinson's teeth and mulberry molars in congenital syphilis (A50.5)")
• Code First: K23 Disorders of esophagus in diseases classified elsewhere ("congenital syphilis (A50.5)")
• Code First: K77 Liver disorders in diseases classified elsewhere ("congenital syphilis (A50.0, A50.5)")
• Code First: M02 Postinfective and reactive arthropathies ("congenital syphilis [Clutton's joints] (A50.5)")
• Code First: N08 Glomerular disorders in diseases classified elsewhere ("congenital syphilis (A50.5)")
• Type 1 Excludes: Q67.4 Other congenital deformities of skull, face and jaw ("syphilitic saddle nose (A50.5)")

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 A50.56

• Anomaly, anomalous (congenital) (unspecified type) › tibia NEC › saber
• Craniotabes (cause unknown) › syphilitic
• Deformity › tibia (acquired) › saber (syphilitic)
• Kyphosis, kyphotic (acquired) › syphilitic, congenital
• Osteochondropathy › syphilitic, congenital › late
• Saber, sabre shin or tibia (syphilitic)
• Syphilis, syphilitic (acquired) › congenital › late, or 2 years or more after birth NEC › symptomatic or with manifestations NEC › osteochondropathy

Nearby codes

• A50.51 Clutton's joints
• A50.52 Hutchinson's teeth
• A50.53 Hutchinson's triad
• A50.54 Late congenital cardiovascular syphilis
• A50.55 Late congenital syphilitic arthropathy
• A50.56 Late congenital syphilitic osteochondropathy (this code)
• A50.57 Syphilitic saddle nose
• A50.59 Other late congenital syphilis, symptomatic
• A50.6 Late congenital syphilis, latent
• A50.7 Late congenital syphilis, unspecified
• A50.9 Congenital syphilis, unspecified