A66.4Billable

Gummata and ulcers of yaws

Chapter
1. Certain infectious and parasitic diseases
Category
A66
Effective date
October 1, 2026

Related codes in category A66

A66YawsA66.0Initial lesions of yawsYesA66.1Multiple papillomata and wet crab yawsYesA66.2Other early skin lesions of yawsYesA66.3Hyperkeratosis 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 A66.4?

A66.4 is an ICD-10-CM diagnosis code for Gummata and ulcers of yaws.

Is A66.4 a billable code?

Yes. A66.4 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is A66.4 in?

A66.4 falls under Chapter 1: Certain infectious and parasitic diseases.

When did A66.4 become effective?

A66.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to A66.4?

A66.4 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.