T83.512A Infection and inflammatory reaction due to nephrostomy catheter, initial encounter

ICD-10-CM T83.512A: Infection and inflammatory reaction due to nephrostomy catheter, initial encounter

ICD-10-CM code T83.512A identifies an infection and inflammatory reaction due to a nephrostomy catheter during the initial encounter. A nephrostomy tube is a drainage catheter placed into the kidney's collecting system to drain urine. Complications from these tubes include urinary tract infections and local skin inflammatory reactions. 1 2

Plain-language overview

A nephrostomy tube is a catheter placed into the kidney collecting system to provide temporary or permanent urine drainage, often due to obstruction from calculi, malignancy, strictures, or abscess. 2

Complications associated with nephrostomy tubes include urinary tract infections that may progress to pyelonephritis or sepsis, as well as local inflammatory reactions of the skin and catheter displacement. 2

What this code represents

The active terminology record for T83.512A defines the concept as an infection and inflammatory reaction due to a nephrostomy catheter, initial encounter, classifying it as a pathologic function. 1

The T83.512A code is a narrower concept under the parent code T83.512, which represents an infection and inflammatory reaction due to a nephrostomy catheter without specifying the encounter. 1

Documentation considerations

Clinical documentation for this condition should link the diagnosis to objective findings, the time course of the infection or inflammation, and the ongoing plan of care. 3

Medical records for this diagnosis should support decision continuity from patient triage through discharge to ensure clear communication of the clinical management plan. 3

What the sources add

While the terminology record provides the official code definition and hierarchy, the clinical evidence review details the physical characteristics and complications of nephrostomy catheters in practice. 1 2

The clinical guide indicates that presentation with this diagnosis is evaluated based on pain severity, functional limitation, and progression pattern, while the evidence review notes infection risks related to catheter material. 2 3

Coverage and utilization context

The clinical guide notes that differential diagnosis for this condition includes condition-specific mimics alongside high-risk alternatives such as vascular compromise, nerve injury, infection, and referred pain syndromes. 3

Sources

1. ICD-10-CM T83.512A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Infection And Inflammatory Reaction Due To Nephrostomy Catheter, Initial Encounter | ICD-10-CM T83.512A Clinical Guide — sprypt.com; accessed 2026-07-27.