B74.4 ICD-10-CM Code: Mansonelliasis
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Helminthiases (B65-B83)
B74.4
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMansonelliasis
Mansonelliasis is a parasitic infection caused by Mansonella worms, which are transmitted through insect bites and can cause skin irritation, itching, and other symptoms. This is a tropical disease primarily found in Africa and South America.
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- Infection due to Mansonella ozzardi
- Infection due to Mansonella perstans
- Infection due to Mansonella streptocerca
Excludes 2
Official- onchocerciasis (B73)
- tropical (pulmonary) eosinophilia NOS (J82.89)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for B74.4 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B74.4 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B74.4 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B74.4 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B74.4 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 B74.4 an HCC code?
No. B74.4 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
B74.4 is the ICD-10-CM diagnosis code for mansonelliasis. Mansonelliasis is a parasitic infection caused by Mansonella worms, which are transmitted through insect bites and can cause skin irritation, itching, and other symptoms. This is a tropical disease primarily found in Africa and South America. B74.4 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering helminthiases (b65-b83).
B74.4 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.
Verify the specific type of Mansonella infection (M. streptocerca, M. ozzardi, or M. perstans) in the medical record, as some may have more specific codes available.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for B74.4 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the specific type of Mansonella infection (M. streptocerca, M. ozzardi, or M. perstans) in the medical record, as some may have more specific codes available
- •Document the geographic location or travel history to endemic areas, as this supports medical necessity and helps establish the diagnosis