In simple words: This condition involves repeated kidney infections due to urine flowing back up from the bladder. It causes loin pain (pain in the side, between the abdomen and back) and painful urination, sometimes with fever and weakness.

Nonobstructive reflux-associated chronic pyelonephritis is a kidney infection characterized by inflammation of the renal pelvis and kidney tissue (pyelonephritis) that occurs in the absence of any blockage in the urinary tract. It is specifically associated with vesicoureteral reflux, a condition where urine flows backward from the bladder into the ureters and kidneys.

Example 1: A 45-year-old female presents with recurrent urinary tract infections and flank pain. Diagnostic imaging reveals vesicoureteral reflux and chronic pyelonephritis. The patient is diagnosed with N11.0., A child with a history of urinary tract infections is found to have persistent kidney inflammation and scarring due to vesicoureteral reflux. This condition is coded as N11.0., A patient with known vesicoureteral reflux develops symptoms of pyelonephritis, including fever, chills, and back pain. The physician documents N11.0 as the diagnosis.

Documentation should include evidence of chronic pyelonephritis (e.g., imaging studies, urinalysis, clinical findings) and the presence of vesicoureteral reflux without obstruction (e.g., voiding cystourethrogram).The infectious agent should be identified using an additional code (B95-B97).