A66Header code — not billable
Yaws
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A66
- Effective date
- October 1, 2026
Related codes in category A66
A66.0Initial lesions of yawsYesA66.1Multiple papillomata and wet crab yawsYesA66.2Other early skin lesions of yawsYesA66.3Hyperkeratosis of yawsYesA66.4Gummata and ulcers of yawsYesA66.5GangosaYesA66.6Bone and joint lesions of yawsYesA66.7Other manifestations of yawsYesA66.8Latent yawsYesA66.9Yaws, unspecifiedYes
Frequently asked questions
What is ICD-10 code A66?
A66 is an ICD-10-CM diagnosis code for Yaws.
Is A66 a billable code?
No. A66 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is A66 in?
A66 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A66 become effective?
A66 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to A66?
A66 belongs to category A66, which includes 10 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.