A66: Yaws
Codes under A66 (Yaws). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A66.0 | Initial lesions of yaws | ✓ |
| A66.0 | Initial lesions of yaws | ✓ |
| A66.1 | Multiple papillomata and wet crab yaws | ✓ |
| A66.1 | Multiple papillomata and wet crab yaws | ✓ |
| A66.2 | Other early skin lesions of yaws | ✓ |
| A66.2 | Other early skin lesions of yaws | ✓ |
| A66.3 | Hyperkeratosis of yaws | ✓ |
| A66.3 | Hyperkeratosis of yaws | ✓ |
| A66.4 | Gummata and ulcers of yaws | ✓ |
| A66.4 | Gummata and ulcers of yaws | ✓ |
| A66.5 | Gangosa | ✓ |
| A66.5 | Gangosa | ✓ |
| A66.6 | Bone and joint lesions of yaws | ✓ |
| A66.6 | Bone and joint lesions of yaws | ✓ |
| A66.7 | Other manifestations of yaws | ✓ |
| A66.7 | Other manifestations of yaws | ✓ |
| A66.8 | Latent yaws | ✓ |
| A66.8 | Latent yaws | ✓ |
| A66.9 | Yaws, unspecified | ✓ |
| A66.9 | Yaws, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code A66?
A66 is an ICD-10-CM category covering Yaws. It contains 20 more specific diagnosis codes, 20 of which are billable.
Is A66 a billable code?
No — A66 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A66.0 — Initial lesions of yaws). 20 of the 20 codes under A66 are billable.
What codes fall under A66?
A66 includes A66.0, A66.0, A66.1, A66.1, A66.2, plus 15 more. See the full list with descriptions and billable status above.
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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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