Chronic tubulo-interstitial nephritis, unspecified
ICD-10 N11.9 is a billable code used to indicate a diagnosis of chronic tubulo-interstitial nephritis, unspecified.
Chronic tubulo-interstitial nephritis (TIN) is a progressive kidney disease characterized by inflammation and fibrosis of the renal interstitium, leading to tubular dysfunction. This condition can result from various etiologies, including prolonged exposure to nephrotoxins, autoimmune diseases, and recurrent urinary tract infections (UTIs). Pyelonephritis, a type of kidney infection, can contribute to the development of TIN, particularly when it is recurrent or inadequately treated. Interstitial nephritis may also arise from drug-induced nephropathy, where certain medications, such as non-steroidal anti-inflammatory drugs (NSAIDs) or antibiotics, cause damage to the renal interstitium. Patients may present with symptoms such as fatigue, hypertension, and changes in urine output. Hydronephrosis, which is the swelling of a kidney due to a build-up of urine, can occur if there is an obstruction in the urinary tract. Management often involves addressing the underlying cause, such as treating UTIs with appropriate antibiotics, and monitoring renal function. Chronic TIN can lead to end-stage renal disease if not managed effectively, making early diagnosis and intervention crucial.
Detailed patient history, including medication use, symptoms, and lab results.
Patients with chronic kidney disease, recurrent UTIs, or those on nephrotoxic medications.
Ensure documentation reflects the chronic nature and any contributing factors to avoid misclassification.
Surgical history, imaging results, and any interventions performed.
Patients with hydronephrosis or urinary obstruction leading to renal impairment.
Document any surgical interventions or procedures that may impact renal function.
Used to evaluate for hydronephrosis or other renal abnormalities.
Document indications for the ultrasound and findings.
Nephrologists and urologists should ensure imaging results are included in the patient's record.
Common causes include prolonged exposure to nephrotoxic drugs, autoimmune diseases, recurrent urinary tract infections, and metabolic disorders.
