Onchocerciasis (B73) ICD-10-CM
The B73 code range covers onchocerciasis with 7 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- onchocerca volvulus infection
- onchocercosis
- river blindness
Codes in the B73 Range 7 codes · 5 billable
- B73 OnchocerciasisNon-billable
- B73.0 Onchocerciasis with eye diseaseNon-billable
- B73.00 Onchocerciasis with eye involvement, unspecified
- B73.01 Onchocerciasis with endophthalmitis
- B73.02 Onchocerciasis with glaucoma
- B73.09 Onchocerciasis with other eye involvement
- B73.1 Onchocerciasis without eye disease
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B73 range.
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.
About the B73 Code Range
ICD-10 code B73 identifies onchocerciasis, a parasitic infection caused by the Onchocerca worm. These codes specifically capture whether the infection affects the eyes or not, helping accurately classify the condition's severity and presentation.
The ICD-10 code for onchocerciasis includes distinctions for eye involvement: B73.0 covers onchocerciasis with eye disease, including subcodes like B73.00 for unspecified eye involvement (also known as ocular onchocerciasis), B73.01 for endophthalmitis related to the infection, and B73.02 for glaucoma caused by Onchocerca volvulus, sometimes called glaucoma following ocular onchocerciasis. Other eye complications are captured under B73.09, with synonyms including onchocerca chorioretinitis or parasitic chorioretinitis. When the infection does not involve the eyes, B73.1 is used, which includes various skin manifestations such as onchodermatitis and subcutaneous nodules. These distinctions help healthcare providers document and bill cases precisely according to the infection’s specific clinical features.
Questions About This Page
How many billable codes are in the B73 range?
Of the 7 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B73 range classify?
The range classifies onchocerciasis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
