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B73 ICD-10-CM Code: Onchocerciasis

B73 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools

ICD-10-CM Code View

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Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupB73

FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Helminthiases (B65-B83)

B73

Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidance

Onchocerciasis

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

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

Official
B7Helminthiases (B65-B83)B73Onchocerciasis

Inclusion Terms

Official

No inclusion terms are included in this display for B73. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • carrier or suspected carrier of infectious disease (Z22.-)Inherited from A00-B99
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)Inherited from A00-B99
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)Inherited from A00-B99
  • influenza and other acute respiratory infections (J00-J22)Inherited from A00-B99

Related Codes

Official
B73.0Onchocerciasis with eye diseaseB73.1Onchocerciasis without eye disease

Includes

Official
  • onchocerca volvulus infection
  • onchocercosis
  • river blindness
  • diseases generally recognized as communicable or transmissibleInherited from A00-B99

Excludes 1

Official
  • certain localized infections - see body system-related chaptersInherited from A00-B99

Code First

Official

No Code First sequencing instructions are included in this display for B73. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code to identify resistance to antimicrobial drugs (Z16.-)Inherited from A00-B99

Code Also

Official

No Code Also instructions are included in this display for B73. Check the code and parent instructions in the Code Book.

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 →

Code
B73
Description
Onchocerciasis
HCC (V28)
No CMS-HCC V28 mapping
RAF reference coefficient
—
Billable
No
Payment year
2026

Coder workflow notes

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What This Code Means

B73 is the ICD-10-CM diagnosis code for onchocerciasis. B73 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering helminthiases (b65-b83).

Header codes like B73 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for B73 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Includes

  • onchocerca volvulus infection
  • onchocercosis
  • river blindness

Child Codes

B73.0Onchocerciasis with eye disease
B73.1Onchocerciasis without eye disease

Code Hierarchy

└B73Onchocerciasis
└B73Onchocerciasis

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