A66 – Yaws
ICD-10-CM 2027 diagnosis code · Other spirochetal diseases
ICD-10-CM code
A66
- Code
A66(claims format:A66)- Description
- Yaws
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A65-A69 Other spirochetal diseases
Billable codes under A66
A66 is a header code and cannot be used on claims. Choose the most specific code:
- A66.0 – Initial lesions of yawsBillable
- A66.1 – Multiple papillomata and wet crab yawsBillable
- A66.2 – Other early skin lesions of yawsBillable
- A66.3 – Hyperkeratosis of yawsBillable
- A66.4 – Gummata and ulcers of yawsBillable
- A66.5 – GangosaBillable
- A66.6 – Bone and joint lesions of yawsBillable
- A66.7 – Other manifestations of yawsBillable
- A66.8 – Latent yawsBillable
- A66.9 – Yaws, unspecifiedBillable
Notes for A66
Includes:
- bouba
- frambesia (tropica)
- pian
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block A65-A69
Frequently asked questions
What is ICD-10 code A66?
A66 is the ICD-10-CM code for yaws, in the block A65-A69 (Other spirochetal diseases).
Is A66 a billable code?
No. A66 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.