HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / TX

GREGORY L SHANNON, MD

INTERNAL MEDICINE

Medical school: NORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL

Graduated: 1996

Also: GASTROENTEROLOGY

Offers telehealth

NPI: 1730148495

Practice Locations (4)

GASTROENTEROLOGY ASSOCIATES OF TEXAS PA

17500 W GRAND PKWY S

SUGAR LAND, TX 774792562

2812011338

GASTROENTEROLOGY ASSOCIATES OF TEXAS PA

17510 W GRAND PKWY S, SUITE 220

SUGAR LAND, TX 774792647

2812011338

HOUSTON REGIONAL GASTROENTEROLOGY INSTITUTE PLLC

17510 W GRAND PKWY S, SUITE 220

SUGAR LAND, TX 774792647

2812011338

GASTROENTEROLOGY ASSOCIATES OF TEXAS PA

17500 W GRAND PKWY S, SUITE 220

SUGARLAND, TX 774792562

Source: CMS National Downloadable File, September 2026.