A48.4 ICD-10-CM Code: Brazilian purpuric fever
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other bacterial diseases (A30-A49)
A48.4
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceBrazilian purpuric fever
Brazilian purpuric fever is a rare infectious disease caused by a specific bacterium that causes sudden onset of fever, purple skin rashes, and can lead to serious complications including shock and organ failure. It primarily affects children and can progress rapidly if not treated promptly.
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- Systemic Hemophilus aegyptius infection
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A48.4 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A48.4 in this effective period.
Excludes 1
Official- actinomycetoma (B47.1)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A48.4 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A48.4 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A48.4 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 A48.4 an HCC code?
No. A48.4 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A48.4 is the ICD-10-CM diagnosis code for brazilian purpuric fever. Brazilian purpuric fever is a rare infectious disease caused by a specific bacterium that causes sudden onset of fever, purple skin rashes, and can lead to serious complications including shock and organ failure. It primarily affects children and can progress rapidly if not treated promptly. A48.4 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other bacterial diseases (a30-a49).
A48.4 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.
This is a rare disease, so verify the diagnosis is clearly documented in the medical record before coding; do not assume based on similar presentations.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A48.4 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a rare disease, so verify the diagnosis is clearly documented in the medical record before coding; do not assume based on similar presentations
- •Ensure you capture any associated complications (such as sepsis, meningitis, or shock) with additional codes, as these significantly impact severity and treatment