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v1.0.0
ICD-10 Guide
ICD-10 CodesA66

A66

Yaws

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 A66 is a billable code used to indicate a diagnosis of yaws.

Key Diagnostic Point:

Yaws is a chronic infectious disease caused by the spirochete Treponema pallidum subspecies pertenue. It primarily affects the skin, bones, and joints, presenting initially with a painless skin lesion known as a 'yaw.' If left untreated, the disease can progress to cause disfiguring lesions and severe bone and joint deformities. Yaws is transmitted through direct contact with the skin lesions of an infected person, typically in tropical and subtropical regions. The disease is endemic in parts of Africa, Southeast Asia, and the Pacific Islands, where it predominantly affects children aged 6 to 15 years. Diagnosis is primarily clinical, supported by serological tests. Treatment is effective with a single dose of benzathine penicillin, which can cure the infection and prevent complications. Public health initiatives have focused on the eradication of yaws, emphasizing early detection and treatment to reduce transmission and morbidity.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation can lead to misdiagnosis.
  • Differentiation from other treponemal infections is necessary.
  • Geographic prevalence may affect coding accuracy.
  • Documentation of serological testing results is essential.

Audit Risk Factors

  • Inadequate documentation of clinical findings.
  • Failure to document serological test results.
  • Misclassification of the disease due to lack of awareness of endemic areas.
  • Inconsistent coding practices across different healthcare settings.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical history, serological test results, and treatment plans.

Common Clinical Scenarios

Diagnosis and management of yaws in endemic populations.

Billing Considerations

Awareness of local epidemiology and potential co-infections.

Pediatrics

Documentation Requirements

Growth and development assessments, vaccination history, and family history.

Common Clinical Scenarios

Presentation of skin lesions in children from endemic areas.

Billing Considerations

Consideration of other childhood infections that may present similarly.

Coding Guidelines

Inclusion Criteria

Use A66 When
  • According to ICD
  • 10 guidelines, yaws is classified under A66
  • It is important to document the clinical presentation and any serological tests performed

Exclusion Criteria

Do NOT use A66 When
  • Exclusion criteria include other treponemal infections that may present similarly

Related Codes

Child Codes

10 codes
A66.0
Primary genital syphilis
A66.1
Primary genital syphilis
A66.2
Yaws of bones
A66.3
Yaws of bones
A66.4
Yaws of bones
A66.5
Yaws of bones
A66.6
Yaws of bones
A66.7
Yaws of bones
A66.8
Other specified yaws infections
A66.9
Yaws, unspecified

Related CPT Codes

86592CPT Code

Syphilis serology

Clinical Scenario

Used to confirm diagnosis of yaws in endemic areas.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Infectious disease specialists should ensure comprehensive testing.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of yaws, improving tracking and management of the disease in endemic areas. It has also facilitated better public health reporting and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of yaws, improving tracking and management of the disease in endemic areas. It has also facilitated better public health reporting and resource allocation.

Reimbursement & Billing Impact

reimbursement and compliance.

Resources

Clinical References

  • •
    World Health Organization - Yaws

Coding & Billing References

  • •
    World Health Organization - Yaws

Frequently Asked Questions

What is yaws?

Yaws is a chronic infectious disease caused by the spirochete Treponema pallidum subspecies pertenue, primarily affecting the skin, bones, and joints.

How is yaws transmitted?

Yaws is transmitted through direct contact with the skin lesions of an infected person, typically in tropical and subtropical regions.

What are the symptoms of yaws?

Symptoms include painless skin lesions, joint pain, and, if untreated, can lead to severe deformities.

How is yaws treated?

Yaws is effectively treated with a single dose of benzathine penicillin.