Diagnostic Code 7504 · 38 CFR §4.115b
Chronic pyelonephritis is recurring or persistent bacterial infection of the kidneys. Unlike a simple UTI that stays in the bladder, pyelonephritis involves the kidney tissue itself. Repeated infections cause scarring that progressively damages kidney function. Veterans commonly develop this from recurrent UTIs during service (especially during deployments with limited hygiene access), kidney stones causing infection, or urinary tract obstructions.
| Rating | Criteria |
|---|---|
| 0% | History of nephritis with no current symptoms or kidney function impairment. |
| 10% | Long-term drug therapy required, OR recurring symptomatic infections requiring intermittent intensive management with antibiotics. |
| 30% | Recurring symptomatic infections requiring drainage/frequent hospitalization (greater than two times per year) and/or requiring continuous intensive management. Where additional functional impairment from kidney dysfunction is present, evaluate under renal dysfunction criteria, whichever rating is higher. |
| 60% | Severe pyelonephritis with persistent functional impairment — rate under renal dysfunction criteria if higher (60% renal dysfunction level). |
Urine cultures documenting the recurring infections are essential. Imaging showing kidney scarring from repeated infections demonstrates permanent damage. Kidney function tests showing progressive decline support higher ratings. Treatment records showing antibiotic courses and their frequency document the recurrence pattern. Service records establishing when the infections began connect the condition to service.
There is no specific number that defines chronic, but generally three or more kidney infections per year, or infections that never fully resolve between episodes, indicate a chronic pattern. Document every infection with medical visits and cultures to build the record.
Yes. Repeated lower urinary tract infections can spread to the kidneys, especially when field conditions prevent prompt treatment. If you had recurring UTIs during service that escalated to kidney infections, the progression from service-connected UTIs to chronic pyelonephritis is a clear chain of causation for a secondary claim.