A66.4: Gummata and ulcers of yaws
A66.4 is the billable ICD-10-CM diagnosis code for Gummata and ulcers of yaws. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code A66.4?
A66.4 is the ICD-10-CM diagnosis code for Gummata and ulcers of yaws. It belongs to category A66 (Yaws).
Is A66.4 a billable code?
Yes. A66.4 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does A66.4 belong to?
A66.4 is part of ICD-10-CM category A66 — Yaws, which has 20 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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