A44.1 ICD-10-CM Code: Cutaneous and mucocutaneous bartonellosis
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other bacterial diseases (A30-A49)
A44.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCutaneous and mucocutaneous bartonellosis
This is a bacterial skin infection caused by Bartonella bacteria that affects the skin and mucous membranes, typically causing nodules, ulcers, or lesions on the skin surface and inside the mouth or other mucous-lined areas. It is also known as verruga peruana or Carrión's disease in its chronic form.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Verruga peruana
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A44.1 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A44.1 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A44.1 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A44.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A44.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A44.1 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is A44.1 an HCC code?
No. A44.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A44.1 is the ICD-10-CM diagnosis code for cutaneous and mucocutaneous bartonellosis. This is a bacterial skin infection caused by Bartonella bacteria that affects the skin and mucous membranes, typically causing nodules, ulcers, or lesions on the skin surface and inside the mouth or other mucous-lined areas. It is also known as verruga peruana or Carrión's disease in its chronic form. A44.1 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other bacterial diseases (a30-a49).
A44.1 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify the specific site of infection (cutaneous vs. mucocutaneous involvement) in the clinical documentation to ensure accurate code selection, as this distinction is important for treatment planning.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A44.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the specific site of infection (cutaneous vs. mucocutaneous involvement) in the clinical documentation to ensure accurate code selection, as this distinction is important for treatment planning
- •Confirm the causative Bartonella species if documented, as some variants may have additional specificity codes; also document whether this is the acute or chronic phase of the disease