A44.8 ICD-10-CM Code: Other forms of bartonellosis
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other bacterial diseases (A30-A49)
A44.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther forms of bartonellosis
This code represents uncommon or atypical forms of bartonellosis, a bacterial infection caused by Bartonella organisms that can affect the skin, blood vessels, and other organs. It is used when the bartonellosis doesn't fit into the more common categories like cat scratch disease or Oroya fever.
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
OfficialICD-10-CM does not list inclusion terms for A44.8 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A44.8 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A44.8 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A44.8 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A44.8 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A44.8 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A44.8 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 A44.8 an HCC code?
No. A44.8 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
A44.8 is the ICD-10-CM diagnosis code for other forms of bartonellosis. This code represents uncommon or atypical forms of bartonellosis, a bacterial infection caused by Bartonella organisms that can affect the skin, blood vessels, and other organs. It is used when the bartonellosis doesn't fit into the more common categories like cat scratch disease or Oroya fever. A44.8 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other bacterial diseases (a30-a49).
A44.8 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.
Use this code only when the specific form of bartonellosis is documented but doesn't match codes A44.0 (Carrion's disease), A44.1 (acute phase/Oroya fever), or A44.9 (unspecified bartonellosis).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A44.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the specific form of bartonellosis is documented but doesn't match codes A44.0 (Carrion's disease), A44.1 (acute phase/Oroya fever), or A44.9 (unspecified bartonellosis)
- •Ensure the medical record clearly documents the type of bartonellosis infection and verify it is indeed a Bartonella species infection before coding, as this is a rare condition requiring specific diagnostic confirmation