Professionals in this career treat issues with the stomach and esophagus. dietitiangastroenterologistcolorectal surgeonorthodontist

A gastroenterologist specializes in the digestive system, including the stomach and esophagus. A dietitian focuses on nutrition, a colorectal surgeon treats conditions involving the colon and rectum, and an orthodontist works with teeth and jaw alignment. Therefore, the correct choice is gastroenterologist.

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