ICD-10 Code B87.81 – Genitourinary myiasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B87.81 – Genitourinary myiasis
What it is
B87.81 identifies myiasis affecting the genitourinary tract, meaning fly larvae infest urinary or genital tissues. Use this code when documentation clearly states this specific parasitic infestation.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include irritation, pain, discharge, hematuria, or visible larvae in the urinary or genital area.
When to use this code
Use B87.81 when the provider documents genitourinary myiasis or infestation of the urinary or genital tract by fly larvae. It fits confirmed or clearly stated cases, including those noted on examination, procedure, or pathology reports. If the site is not specified, check documentation before assigning this code.
Do not use for
Do not use this code for nonspecific urogenital itching, infection, or foreign body complaints without documented myiasis. Do not assume the diagnosis from travel history or wound contamination alone.
Coding tip
Code the documented anatomic site exactly; if the note only says myiasis, query for the genitourinary location.