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v1.0.0
ICD-10 Guide
ICD-10 CodesA66.5

A66.5

Yaws of bones

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

Code Description

ICD-10 A66.5 is a billable code used to indicate a diagnosis of yaws of bones.

Key Diagnostic Point:

Yaws is a chronic infectious disease caused by the spirochete Treponema pallidum pertenue, primarily affecting the skin, bones, and cartilage. Yaws of bones specifically refers to the involvement of the skeletal system, which can lead to painful lesions, deformities, and functional impairment. The disease is endemic in tropical regions, particularly in parts of Africa, Southeast Asia, and the Pacific Islands. Transmission occurs through direct contact with the lesions of an infected person, typically in children aged 2 to 15 years. The disease progresses through stages, starting with a primary lesion (the mother yaw), followed by secondary lesions that can affect the bones. Diagnosis is often clinical, supported by serological tests. Treatment involves the administration of antibiotics, primarily benzathine penicillin, which is effective in eradicating the infection and preventing complications. If left untreated, yaws can lead to significant morbidity, including bone deformities and chronic pain.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of spirochetal diseases and their manifestations.
  • Differentiation from other treponemal infections.
  • Geographic and demographic considerations for accurate coding.
  • Potential for misdiagnosis with other bone conditions.

Audit Risk Factors

  • Inadequate documentation of clinical findings.
  • Failure to specify bone involvement.
  • Misclassification with other bone diseases.
  • Lack of follow-up documentation on treatment outcomes.

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 geographic prevalence and potential co-infections.

Orthopedics

Documentation Requirements

Imaging studies, surgical notes if applicable, and follow-up assessments.

Common Clinical Scenarios

Management of bone deformities resulting from yaws.

Billing Considerations

Need for interdisciplinary communication regarding treatment plans.

Coding Guidelines

Inclusion Criteria

Use A66.5 When
  • Follow the official ICD
  • CM coding guidelines for infectious diseases, ensuring accurate documentation of the condition's manifestations and any associated complications

Exclusion Criteria

Do NOT use A66.5 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits after initial diagnosis and treatment of yaws.

Documentation Requirements

Document clinical findings, treatment response, and any new symptoms.

Specialty Considerations

Infectious disease specialists should ensure thorough documentation of the patient's history and treatment plan.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of yaws and its complications, improving the accuracy of epidemiological data and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of yaws and its complications, improving the accuracy of epidemiological data and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of yaws and its complications, improving the accuracy of epidemiological data and treatment tracking.

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 pertenue, primarily affecting the skin, bones, and cartilage, and is endemic in tropical regions.

How is yaws transmitted?

Yaws is transmitted through direct contact with the lesions of an infected person, typically affecting children in endemic areas.

What are the treatment options for yaws?

The primary treatment for yaws is benzathine penicillin, which is effective in eradicating the infection and preventing complications.