B58: ICD10 Code for Toxoplasmosis
B58 is the ICD10 code used for documenting Toxoplasmosis in clinical and billing records.

B58 refers to Toxoplasmosis, a parasitic or protozoal infection that can range from self-limiting to life-threatening. These infections are often vector-borne or zoonotic and may affect multiple organ systems. Accurate ICD10 coding ensures proper diagnosis, treatment tracking, and public health reporting, especially in endemic areas.
Symptoms
- Fever – Often periodic in malaria and persistent in other protozoal diseases
- Chills and sweating – Common in malaria cycles
- Enlarged spleen or liver – Seen in chronic parasitic infections
- Muscle pain and fatigue – General systemic symptoms
- Neurological symptoms – Possible in cerebral malaria or trypanosomiasis
- Skin ulcers – Seen in cutaneous leishmaniasis
- Respiratory distress – Especially in pneumocystosis and toxoplasmosis
Diagnosis
Diagnosis of Toxoplasmosis is based on clinical signs and confirmed by laboratory tests. These include blood smears (malaria), serology, PCR, antigen detection, or biopsy of affected tissue. Imaging may be used in complications involving the brain, lungs, or heart. Accurate diagnosis is crucial for prompt treatment and disease containment.
ICD10 Code Usage
ICD10 code B58 helps clinicians, coders, and public health officials classify and track protozoal infections. It supports insurance billing, epidemiological surveillance, and international reporting of tropical diseases. In clinical settings, it enables standardized care and helps allocate appropriate treatments and isolation protocols.
Related Codes
- B50 – Plasmodium falciparum malaria
- B51 – Plasmodium vivax malaria
- B52 – Plasmodium malariae malaria
- B53 – Other specified malaria
- B54 – Unspecified malaria
- B55 – Leishmaniasis
- B56 – African trypanosomiasis
- B57 – Chagas' disease
- B59 – Pneumocystosis
- B60 – Other protozoal diseases, not elsewhere classified
- B64 – Unspecified protozoal disease
FAQs
Q1: What is ICD10 code B58?
A: This ICD10 code refers to Toxoplasmosis, used to classify protozoal and parasitic diseases in healthcare documentation.
Q2: Are these diseases preventable?
A: Many are preventable through vector control, sanitation, and prophylactic medications or vaccines (in the case of malaria).
Q3: Who is at risk?
A: People in endemic regions, travelers, and immunocompromised individuals are most vulnerable.
Q4: Are these conditions curable?
A: Many are treatable with antiparasitic medications if diagnosed early.
Q5: Can these diseases become chronic?
A: Yes, diseases like Chagas' and leishmaniasis can have chronic stages affecting organs long term.
Conclusion
ICD10 code B58 plays a crucial role in documenting and managing Toxoplasmosis. Proper coding aids in treatment planning, outbreak response, and global disease tracking. It is essential for improving patient care, guiding public health initiatives, and ensuring accurate healthcare billing and records.

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