ICD-10 Code A18.11 – Tuberculosis of kidney and ureter (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.11 – Tuberculosis of kidney and ureter
What it is
This code identifies tuberculosis infection involving the kidney and ureter. Use it when Mycobacterium tuberculosis affects these urinary tract structures, whether as a primary documented site or part of genitourinary tuberculosis.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include urinary symptoms, flank pain, hematuria, sterile pyuria, or imaging changes affecting the kidney or ureter.
When to use this code
Use A18.11 when the record clearly documents tuberculosis of the kidney, ureter, or both. It is appropriate for confirmed genitourinary TB involving these sites, including cases noted on imaging, pathology, or clinician assessment.
Do not assume this code from urinary complaints alone; the documentation should support tuberculosis as the cause. If the note mentions broader renal tuberculosis without site detail, check whether a more specific code is supported.
Do not use for
Do not use this code for nonspecific urinary tract infection, kidney stones, or renal disease without tuberculosis. Check documentation if the chart does not identify the kidney or ureter as the involved site.
Coding tip
Verify the exact anatomic site in the provider note before assigning A18.11.