ICD-10 Code B57.3 – Chagas’ disease (chronic) with digestive system involvement (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B57.3 – Chagas’ disease (chronic) with digestive system involvement
What it is
B57.3 identifies chronic Chagas’ disease when the digestive system is affected. Use it for documented chronic Trypanosoma cruzi infection with esophageal or intestinal involvement.
Clinical signs
Clinical features vary; refer to documentation. Common digestive involvement includes dysphagia, regurgitation, constipation, abdominal distention, or symptoms consistent with megaesophagus or megacolon.
When to use this code
Use this code when the record clearly states chronic Chagas’ disease and links it to digestive manifestations. It applies when the provider documents gastrointestinal complications from the infection, not just exposure or a remote history. Check documentation if the site of involvement is unclear.
Do not use for
Do not use it for acute Chagas’ disease, isolated cardiac involvement, or unspecified chronic Chagas’ disease. Also avoid it when digestive symptoms are present but Chagas’ disease is not documented.
Coding tip
Code the specific chronic manifestation only when the chart connects it to Chagas’ disease.