ICD-10 Code A18.1 – Tuberculosis of genitourinary system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.1 – Tuberculosis of genitourinary system
What it is
A18.1 identifies tuberculosis infection involving the urinary or reproductive organs. Use it when documentation shows genitourinary tuberculosis, including renal, bladder, ureteral, or genital involvement.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include urinary symptoms, flank or pelvic pain, hematuria, or evidence of tuberculosis affecting the genitourinary tract.
When to use this code
Use this code when the provider documents active tuberculosis of the genitourinary system. It may appear in notes describing renal TB, bladder TB, or other confirmed genitourinary involvement from Mycobacterium tuberculosis.
Code it only when the record supports tuberculosis in this site, not merely a history of TB or nonspecific urinary complaints. Check documentation if the anatomic site or activity status is unclear.
Do not use for
Do not use A18.1 for pulmonary tuberculosis without genitourinary involvement. Also avoid it for nonspecific urinary tract infection, kidney disease, or past TB that is no longer active.
Coding tip
Verify the exact genitourinary site and active TB status in the provider note before assigning A18.1.