B73.1 ICD-10-CM Code: Onchocerciasis without eye disease
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Helminthiases (B65-B83)
B73.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOnchocerciasis without eye disease
This is a parasitic infection caused by a worm transmitted through blackfly bites, affecting the skin and subcutaneous tissues without involving the eyes. The condition causes itching, skin nodules, and tissue damage but has not affected vision or eye structures.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for B73.1 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for B73.1 in this effective period.
Related Child Codes
Includes
Official- onchocerca volvulus infection
- onchocercosis
- river blindness
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B73.1 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B73.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B73.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B73.1 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is B73.1 an HCC code?
No. B73.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- B73.1
- Description
- Onchocerciasis without eye disease
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
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
B73.1 is the ICD-10-CM diagnosis code for onchocerciasis without eye disease. This is a parasitic infection caused by a worm transmitted through blackfly bites, affecting the skin and subcutaneous tissues without involving the eyes. The condition causes itching, skin nodules, and tissue damage but has not affected vision or eye structures. B73.1 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering helminthiases (b65-b83).
B73.1 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.
Use this code only when onchocerciasis is confirmed without any ocular manifestations; if eye involvement is present, use B73.0 instead.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for B73.1 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 onchocerciasis is confirmed without any ocular manifestations; if eye involvement is present, use B73.0 instead
- •This code is typically seen in patients from endemic areas (parts of Africa, Yemen, Latin America, and Yemen); document the anatomical sites affected (skin, subcutaneous nodules) for complete clinical picture