ICD-10 Code B73.0 – Onchocerciasis with eye disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B73.0 – Onchocerciasis with eye disease
What it is
B73.0 identifies onchocerciasis, also called river blindness, when the infection involves the eye. Use it for documented eye disease caused by Onchocerca volvulus.
Clinical signs
Clinical features vary; refer to documentation. Eye involvement may include itching, redness, photophobia, reduced vision, keratitis, or other ocular inflammation linked to onchocerciasis.
When to use this code
Use B73.0 when the record clearly states onchocerciasis with ocular involvement or river blindness affecting the eye. It also fits confirmed parasitic eye disease attributed to Onchocerca volvulus. If the note only says onchocerciasis without eye findings, check documentation before coding.
Do not use for
Do not use this code for onchocerciasis without eye disease. It is also wrong for other causes of conjunctivitis, keratitis, or vision loss unless the provider links them to Onchocerca infection.
Coding tip
Code the eye manifestation only when the provider documents ocular involvement; otherwise, use the more general onchocerciasis code.