ICD-10 Code B58.9 – Toxoplasmosis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B58.9 – Toxoplasmosis, unspecified
What it is
B58.9 identifies toxoplasmosis when the record does not specify the organ involved, timing, or clinical form. Use it for a documented Toxoplasma infection without further detail.
Clinical signs
Clinical features vary; refer to documentation. Toxoplasmosis may present with nonspecific febrile illness, lymphadenopathy, or organ-specific findings, but you should code only what is clearly stated.
When to use this code
Use B58.9 when the clinician documents toxoplasmosis and provides no more specific type, site, or complication. It also fits when the chart confirms Toxoplasma infection but the available note does not support a more precise code.
Do not use for
Do not use this code if the record identifies congenital toxoplasmosis, toxoplasmic meningoencephalitis, or another specific manifestation. Check documentation before defaulting to the unspecified category.
Coding tip
Query for the affected site or form of toxoplasmosis before assigning B58.9, because a more specific code may be available.