2026 ICD-10-CM Diagnosis Code B73Onchocerciasis

ICD-10-CM Codes›A00–B99›B65-B83›B73

ICD-10-CM B73
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B73 is a non-billable ICD-10-CM category code for onchocerciasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B73.00, B73.01, B73.02, and B73.09.

Code Identity

ICD-10-CM Code
B73
Billable Status
No — Non-Billable Category
Code Describes
Onchocerciasis
Chapter
B65-B83
Helminthiases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB73Onchocerciasis
This CodeB73Onchocerciasis

Specific Coding for OnchocerciasisOverview

Non-specific codes like B73 require more characters. Use one of these billable codes instead:

  • B73.0 for Onchocerciasis with eye disease

  • Use B73.00 for Onchocerciasis with eye involvement, unspecified

  • Use B73.01 for Onchocerciasis with endophthalmitis

  • Use B73.02 for Onchocerciasis with glaucoma

  • Use B73.09 for Onchocerciasis with other eye involvement

  • Use B73.1 for Onchocerciasis without eye disease

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • onchocerca volvulus infection
  • onchocercosis
  • river blindness

Clinical InformationClinical

  • Onchocerciasis

    infection with nematodes of the genus onchocerca. characteristics include the presence of firm subcutaneous nodules filled with adult worms, pruritus, and ocular lesions.

  • Onchocerciasis, Ocular

    filarial infection of the eyes transmitted from person to person by bites of onchocerca volvulus-infected black flies. the microfilariae of onchocerca are thus deposited beneath the skin. they migrate through various tissues including the eye. those persons infected have impaired vision and up to 20% are blind. the incidence of eye lesions has been reported to be as high as 30% in central america and parts of africa.

Patient EducationClinical

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B73Overview

Is B73 (Onchocerciasis) a billable code?

No. This is a category header that groups the codes for onchocerciasis, and headers cannot be submitted on claims. Claims for onchocerciasis need a more specific code from this category, such as B73.00, B73.01, and B73.02.