A66
Yaws
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 7 never code together
A00-B99chapter
Excludes1
- certain localized infections - see body system-related chapters
Excludes2
- carrier or suspected carrier of infectious disease (Z22.-)Z22.-
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
- infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
- influenza and other acute respiratory infections (J00-J22)J00-J22
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 5
Index entries leading here filed at null
No alphabetic index entry points at this code.
Subordinate codes 10
A66.0 Initial lesions of yaws A66.1 Multiple papillomata and wet crab yaws A66.2 Other early skin lesions of yaws A66.3 Hyperkeratosis of yaws A66.4 Gummata and ulcers of yaws A66.5 Gangosa A66.6 Bone and joint lesions of yaws A66.7 Other manifestations of yaws A66.8 Latent yaws A66.9 Yaws, unspecified
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.