U.S. ICD-10-CM · FY 2027

A66 ICD-10-CM Code: Yaws

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

A66

Yaws

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where A66 sits

  1. 1

    Chapter 1

    Certain infectious and parasitic diseases (A00-B99)

  2. 2

    Section

    Other spirochetal diseases (A65-A69)

  3. 3

    Category A66

    Yaws

  4. 4

    Code A66

    Yaws

More specific choices

Codes under A66

A66 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for A66.

Code first

No “code first” instruction is listed for A66.

Use additional code

No “use additional code” instruction is listed for A66.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for A66.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for A66.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code A66 mean?

A66 is the FY 2027 U.S. ICD-10-CM code for “Yaws.”

Is A66 a billable or specific ICD-10-CM code?

No. A66 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is A66 located in ICD-10-CM?

A66 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other spirochetal diseases (A65-A69) (A65–A69), under category A66, Yaws.

What coding notes are listed for A66?

No inclusion terms are listed for A66 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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