A51.44 Secondary syphilitic nephritis

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

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 091.89 Other forms of secondary syphilis (approximate)

Code annotations containing back-references to A51.44

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 A51.44

• Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) › syphilitic (late) › early (secondary)
• Syphilis, syphilitic (acquired) › nephrotic syndrome (secondary)

Nearby codes

• A51.39 Other secondary syphilis of skin
• A51.4 Other secondary syphilis
• A51.41 Secondary syphilitic meningitis
• A51.42 Secondary syphilitic female pelvic disease
• A51.43 Secondary syphilitic oculopathy
• A51.44 Secondary syphilitic nephritis (this code)
• A51.45 Secondary syphilitic hepatitis
• A51.46 Secondary syphilitic osteopathy
• A51.49 Other secondary syphilitic conditions
• A51.5 Early syphilis, latent
• A51.9 Early syphilis, unspecified