ICD-10 Code B87.89 – Myiasis of other sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B87.89 – Myiasis of other sites
What it is
B87.89 identifies myiasis affecting sites not named by other specific ICD-10 codes. Use it when fly larvae infest a body area, but the record does not support a more specific myiasis code.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you may see local skin irritation, swelling, pain, drainage, or visible larvae at the affected site.
When to use this code
Use this code when the provider documents myiasis at an unspecified or other site and no more precise site code applies. It fits cases such as infestation of a wound, lesion, or body area not separately listed in ICD-10-CM. If the note names a specific site, code that site instead.
Do not use for
Do not use B87.89 when the documentation identifies a different type of parasitic infestation or a more specific myiasis code. Check documentation if the record only describes a wound infection without confirming larvae.
Coding tip
Look for the exact anatomic site and confirm that myiasis is explicitly documented before assigning B87.89.