ICD-10-CM Code For Yaws: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A66 includes diagnoses for yaws and related spirochetal infections that predominantly affect the skin, bones, and cartilage, including primary, secondary, latent, and tertiary manifestations. These ICD-10-CM diagnosis codes are used to document clinical encounters for skin lesions, bone pain or deformity, and systemic involvement, capturing disease severity and anatomic complications relevant to this group. Accurate coding within the ICD-10-CM A66 group supports proper claim adjudication and complete clinical documentation for services related to diagnosis, monitoring, and treatment.

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ICD-10-CM A66: Yaws Overview

The ICD-10-CM A66 group represents infectious conditions caused by the spirochete that primarily affect skin, bone, and cartilage, commonly known as yaws. These diagnoses target cutaneous and musculoskeletal manifestations of a chronic treponemal infection predominantly seen in tropical regions. Accurate coding matters for epidemiologic tracking, public health interventions, and appropriate reimbursement for services related to diagnosis and treatment.

When to Use

Use a code from this group when a clinical or laboratory-confirmed diagnosis of yaws is documented, including presentations with characteristic skin lesions or bone involvement. Select the code that reflects the stage and specific anatomic complications to accurately represent clinical complexity.

ICD-10-CM Codes

10 rows

ICD-10-CM Code	Description
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

DRG Codes

14 rows

DRG Code	Description
011	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC
012	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC
013	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC
154	Other Ear, Nose, Mouth and Throat Diagnoses with MCC
155	Other Ear, Nose, Mouth and Throat Diagnoses with CC
156	Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC
548	Septic Arthritis with MCC
549	Septic Arthritis with CC
550	Septic Arthritis without CC/MCC
606	Minor Skin Disorders with MCC
607	Minor Skin Disorders without MCC
867	Other Infectious and Parasitic Diseases Diagnoses with MCC
868	Other Infectious and Parasitic Diseases Diagnoses with CC
869	Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

Typical Clinical Scenarios

A child in a remote endemic region presents to a primary care clinic with multiple chronic indurated skin ulcers and papillomatous lesions on the face and limbs, with a history of progressive lesions over months and no systemic symptoms; diagnosis is made clinically and confirmed by serologic or microscopic testing for Treponema pertenue, leading to a nonvenereal treponemal infection code. Typical codes: A66.0, A66.9
An adult seen in an urgent care clinic reports acute onset of a single painful ulcerative lesion on the lower leg with surrounding lymphangitic streaking after recent travel to an area where the infection is endemic; clinicians obtain wound swabs and start appropriate therapy, assigning the acute primary localized form code. Typical codes: A66.1, A66.9
A patient with a history of treated skin yaws presents to dermatology with chronic disfiguring gummatous lesions and secondary bacterial superinfection requiring debridement and long-term wound care; the visit documents sequelae and complications of prior infection, so a code for late or advanced cutaneous involvement and an additional code for superinfection are used. Typical codes: A66.4, A66.8

Related Codes

A65-NONVENEREAL-SYPHILIS

ICD-10-CM Code For Nonvenereal Syphilis: Group Overview

A67-PINTA-CARATE

ICD-10-CM Code For Pinta Carate: Group Overview

A68-RELAPSING-FEVERS

ICD-10-CM Code For Relapsing Fevers: Group Overview

A69-OTHER-SPIROCHETAL-INFECTIONS

ICD-10-CM Code For Other Spirochetal Infections: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

10 rows

ICD-10-CM Code	Description
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

DRG Codes

14 rows

DRG Code	Description
011	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC
012	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC
013	Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC
154	Other Ear, Nose, Mouth and Throat Diagnoses with MCC
155	Other Ear, Nose, Mouth and Throat Diagnoses with CC
156	Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC
548	Septic Arthritis with MCC
549	Septic Arthritis with CC
550	Septic Arthritis without CC/MCC
606	Minor Skin Disorders with MCC
607	Minor Skin Disorders without MCC
867	Other Infectious and Parasitic Diseases Diagnoses with MCC
868	Other Infectious and Parasitic Diseases Diagnoses with CC
869	Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

Typical Clinical Scenarios

A child in a remote endemic region presents to a primary care clinic with multiple chronic indurated skin ulcers and papillomatous lesions on the face and limbs, with a history of progressive lesions over months and no systemic symptoms; diagnosis is made clinically and confirmed by serologic or microscopic testing for Treponema pertenue, leading to a nonvenereal treponemal infection code. Typical codes: A66.0, A66.9
An adult seen in an urgent care clinic reports acute onset of a single painful ulcerative lesion on the lower leg with surrounding lymphangitic streaking after recent travel to an area where the infection is endemic; clinicians obtain wound swabs and start appropriate therapy, assigning the acute primary localized form code. Typical codes: A66.1, A66.9
A patient with a history of treated skin yaws presents to dermatology with chronic disfiguring gummatous lesions and secondary bacterial superinfection requiring debridement and long-term wound care; the visit documents sequelae and complications of prior infection, so a code for late or advanced cutaneous involvement and an additional code for superinfection are used. Typical codes: A66.4, A66.8

Related Codes

A65-NONVENEREAL-SYPHILIS

ICD-10-CM Code For Nonvenereal Syphilis: Group Overview

A67-PINTA-CARATE

ICD-10-CM Code For Pinta Carate: Group Overview

A68-RELAPSING-FEVERS

ICD-10-CM Code For Relapsing Fevers: Group Overview

A69-OTHER-SPIROCHETAL-INFECTIONS

ICD-10-CM Code For Other Spirochetal Infections: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Yaws: Group Overview

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ICD-10-CM A66: Yaws Overview

ICD-10-CM Code For Yaws: Group Overview

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ICD-10-CM A66: Yaws Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM A66 group for yaws?

How does accurate coding within the A66 group support reimbursement?

Which clinical encounters are typically documented using A66 codes?

Are there related DRGs that may be triggered by A66 diagnoses?

What specific ICD-10-CM codes correspond to latent and unspecified yaws?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM A66 group for yaws?

How does accurate coding within the A66 group support reimbursement?

Which clinical encounters are typically documented using A66 codes?

Are there related DRGs that may be triggered by A66 diagnoses?

What specific ICD-10-CM codes correspond to latent and unspecified yaws?

References