ICD-10-CM 2027 diagnosis code
A66Yaws
A66 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About A66
A66 is the ICD-10-CM diagnosis code for yaws. It belongs to block A65-A69 (other spirochetal diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: A66.0 (yaws), A66.1 (yaws), A66.2 (yaws), A66.3 (yaws), A66.4 (yaws), A66.5 (Gangosa), A66.6 (yaws), A66.7 (yaws) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under A66
- A66.0Initial lesions of yawsBillable
- A66.1Multiple papillomata and wet crab yawsBillable
- A66.2Other early skin lesions of yawsBillable
- A66.3Hyperkeratosis of yawsBillable
- A66.4Gummata and ulcers of yawsBillable
- A66.5GangosaBillable
- A66.6Bone and joint lesions of yawsBillable
- A66.7Other manifestations of yawsBillable
- A66.8Latent yawsBillable
- A66.9Yaws, unspecifiedBillable
Coding notes
- bouba
- frambesia (tropica)
- pian
Notes that apply from higher levels
Instructions written at a parent level also apply to A66.
Broader instructions also apply from A65-A69 Other spirochetal diseases and Chapter 1: Certain infectious and parasitic diseases.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A66
Is A66 billable?
- No. A66 is a header code. Report one of its more specific subcodes instead.