ICD-10 Code B87.1 – Wound Myiasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B87.1 – Wound myiasis
What it is
B87.1 identifies wound myiasis, a parasitic infestation in which fly larvae are present in a wound. Use it when documentation specifically states myiasis involving a wound site.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may describe visible larvae, wound drainage, tissue irritation, malodor, or delayed healing, but you should code only what is documented.
When to use this code
Use B87.1 when the provider documents wound myiasis or maggot infestation of an open wound. It may also apply when larvae are confirmed in a traumatic, surgical, or chronic wound. If the record only mentions an infected wound without myiasis, check documentation.
Do not use for
Do not use this code for routine wound infection, cellulitis, or foreign material in a wound unless myiasis is documented. Do not assume the diagnosis from odor, drainage, or poor hygiene alone.
Coding tip
Code the infestation only when the record clearly links larvae to the wound and specifies myiasis.