A51.44
BillableSecondary syphilitic nephritis
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
This is a kidney infection caused by syphilis that develops during the secondary stage of the disease, after the initial infection has spread throughout the body. It occurs when the syphilis bacteria damages the kidney's filtering structures.
Coding Tips
- •Verify that the patient has documented secondary syphilis with confirmed kidney involvement before assigning this code; do not assume nephritis without clinical evidence
- •This code should be used alongside the primary secondary syphilis code (A51) and may require an additional code for the type of kidney disease if specified in the documentation
Code Hierarchy
└A51Early syphilis└A51.4Other secondary syphilis└A51.44Secondary syphilitic nephritis
└A51.44Secondary syphilitic nephritis