A66.2 Other early skin lesions of yaws

The ICD-10-CM code for Other early skin lesions of yaws is A66.2 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A65-A69: Other spirochetal diseases (A65-A69)

Category A66

11 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A66.2:

• Yaws › cutaneous, less than five years after infection
• Yaws › eyelid
• Frambeside › of early yaws
• Yaws › early (cutaneous) (macular) (maculopapular) (micropapular) (papular)
• Yaws › early (cutaneous) (macular) (maculopapular) (micropapular) (papular) › frambeside
• Yaws › early (cutaneous) (macular) (maculopapular) (micropapular) (papular) › skin lesions NEC

Inclusion Terms

• Cutaneous yaws, less than five years after infection
• Early yaws (cutaneous)(macular)(maculopapular)(micropapular)(papular)
• Frambeside of early yaws

U.S. Hospital Utilization

A66.2 appeared in too few sampled U.S. inpatient stays in 2020 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)