ICD-10 Code B77.89 – Ascariasis with other complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B77.89 – Ascariasis with other complications
What it is
B77.89 identifies ascariasis caused by Ascaris lumbricoides when the infection has complications not captured by a more specific code. Use it for documented ascariasis with additional clinical problems.
Clinical signs
Clinical features vary; refer to documentation. Ascariasis may present with abdominal pain, intestinal symptoms, or migration-related findings, but this code is only for cases with other documented complications.
When to use this code
Use this code when the record clearly states ascariasis and also describes a complication that is not indexed to a more specific ICD-10 code. It may apply when the provider documents an unusual or unspecified complication tied to the infection.
If the chart only says “ascariasis” without complications, choose the uncomplicated code instead. Check documentation when the complication is vague, because coding requires a documented link between the parasite infection and the added condition.
Do not use for
Do not use B77.89 for uncomplicated ascariasis or for complications caused by another condition. If the complication is separately coded or more specifically described, use the more precise code.
Coding tip
Look for provider wording that connects the complication directly to ascariasis before assigning B77.89.