Singer-actress Mandy Moore got an upper endoscopy done to determine if she has celiac disease, an autoimmune disorder primarily affecting the small intestine.

The "This Is Us" star took to Instagram Stories on Saturday to reveal that she had an upper endoscopy, reports etonline.com.

"Grog city," she wrote alongside a video of herself in a hospital.

"Just had an upper endoscopy to officially see whether or not I have celiac (only way to diagnose)...things are looking (good)."