A66.4 – Gummata and ulcers of yaws
ICD-10-CM 2027 diagnosis code · Other spirochetal diseases
ICD-10-CM code
A66.4
- Code
A66.4(claims format:A664)- Description
- Gummata and ulcers of yaws
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
- Parent codes
- A66
Notes for A66.4
Applicable to:
- Gummatous frambeside
- Nodular late yaws (ulcerated)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
A66 – Yaws
Includes:
- bouba
- frambesia (tropica)
- pian
Block A65-A69
Index terms for A66.4
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Gumma, yaws
- Yaws, ulcers
- Yaws, late nodular
- Granuloma, tropicum
- Yaws, nodular, late
- Yaws, gumma, gummata
- Frambeside, gummatous
- Yaws, gummatous, frambeside
- Gumma, ulcerative due to yaws
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative, yaws
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative, gumma, due to yaws
Related codes in A66
- 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
- A66.5 – GangosaBillable
- A66.6 – Bone and joint lesions of yawsBillable
- A66.7 – Other manifestations of yawsBillable
- A66.8 – Latent yawsBillable
- A66.9 – Yaws, unspecifiedBillable
Frequently asked questions
What is ICD-10 code A66.4?
A66.4 is the ICD-10-CM code for gummata and ulcers of yaws, in the block A65-A69 (Other spirochetal diseases).
Is A66.4 a billable code?
Yes. A66.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does A66.4 belong to?
It belongs to category A66 – Yaws.
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.