ICD-10 Code B57.1 – Acute Chagas’ disease without heart involvement (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B57.1 – Acute Chagas’ disease without heart involvement
What it is
B57.1 identifies acute Chagas’ disease when Trypanosoma cruzi infection is present but there is no documented heart involvement. Use it for the acute phase, not chronic disease.
Clinical signs
Clinical features vary; refer to documentation. Acute Chagas’ disease may include fever, malaise, swelling at the inoculation site, or unilateral periorbital edema, but heart findings should not be documented.
When to use this code
Use this code when the provider documents acute Chagas’ disease and specifically states there is no cardiac involvement. It also fits confirmed acute infection with signs consistent with the acute phase, as long as myocarditis or other heart disease is excluded. Check documentation if the record is unclear.
Do not use for
Do not use B57.1 for chronic Chagas’ disease or when heart involvement is documented. If the chart mentions cardiomyopathy or myocarditis, choose the appropriate Chagas’ code instead.
Coding tip
Verify that “acute” and “without heart involvement” are both documented before assigning B57.1.