A66 — Yaws
Is A66 billable?
No — A66 is a non-billable header code. A66 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 10 billable codes beneath A66.
Billable codes under this header
A66 at a glance
| Code | A66 |
|---|---|
| Description | Yaws |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Includes
Conditions classified to A66.
- bouba
- frambesia (tropica)
- pian
Use additional code — inherited from Chapter 1
Report an additional code alongside A66 to fully describe the condition. A66 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A66, but a patient may have both at the same time. When documentation supports it, A66 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Excludes2 — not included here — inherited from A65-A69
The conditions below are not part of A66, but a patient may have both at the same time. When documentation supports it, A66 and the excluded code may both be reported.
What codes fall under A66? (10)
How long has A66 existed?
A66 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.