ICD-10 Code B73 – Onchocerciasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B73 – Onchocerciasis
What it is
B73 identifies onchocerciasis, a parasitic infection caused by Onchocerca volvulus. Use it when documentation confirms river blindness or another form of this filarial disease.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include intense itching, skin changes, subcutaneous nodules, and eye involvement that can progress to visual impairment.
When to use this code
Use B73 when the provider documents onchocerciasis, onchocercal infection, or river blindness. It may also apply when the record identifies ocular or skin manifestations as part of confirmed infection. Check documentation if the note is nonspecific or only mentions exposure.
Do not use for
Do not use B73 for suspected infection without confirmation. Do not code it for other filarial diseases or for nonspecific pruritus, dermatitis, or eye disease unless onchocerciasis is documented.
Coding tip
Verify the provider names the parasitic disease; if the chart only says “filarial infection,” check documentation before assigning B73.