ICD-10 Code B57.31 – Megaesophagus in Chagas’ disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B57.31 – Megaesophagus in Chagas’ disease
What it is
B57.31 identifies megaesophagus caused by Chagas’ disease. It means the esophagus is abnormally dilated and loses normal movement because of Trypanosoma cruzi infection.
Clinical signs
Typical findings include progressive swallowing difficulty, regurgitation, chest discomfort, and weight loss. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents megaesophagus as a manifestation of Chagas’ disease. Code it when the record links the esophageal dilation to confirmed or suspected Chagas infection. If the chart only says esophageal dilatation without Chagas’ disease, do not assume this code.
Do not use for
Do not use it for esophageal dilation from non-Chagas causes, such as achalasia or other motility disorders. Check documentation if the cause is not clearly stated.
Coding tip
Confirm that the record explicitly connects the megaesophagus to Chagas’ disease before assigning B57.31.