ICD-10 Code B58.01 – Toxoplasma chorioretinitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B58.01 – Toxoplasma chorioretinitis
What it is
B58.01 identifies toxoplasma chorioretinitis, an eye infection and inflammation caused by Toxoplasma gondii. It affects the retina and choroid and can impair vision.
Clinical signs
Typical findings include blurred vision, floaters, eye pain, redness, or decreased visual acuity. Clinical features vary; refer to documentation, especially when exam notes describe active retinal inflammation or a characteristic scar with reactivation.
When to use this code
Use B58.01 when the provider documents toxoplasma chorioretinitis or toxoplasmic retinochoroiditis involving the eye. Code it for confirmed ocular toxoplasmosis affecting the retina or choroid, whether active or recurrent, when the diagnosis is clearly stated. Check documentation if laterality or acuity is not specified.
Do not use for
Do not use this code for nonspecific conjunctivitis, keratitis, or uveitis without documentation of toxoplasma involvement. If the record only says “toxoplasmosis” without ocular disease, use the more appropriate systemic code instead.
Coding tip
Look for provider wording that ties the eye findings to toxoplasma; if the ocular diagnosis is uncertain, code only what is documented.