In plain English
Gastroenterology covers the oesophagus, stomach, intestines, pancreas, gallbladder and liver. It is a procedural specialty as much as a medical one: endoscopy and colonoscopy are the day-to-day work alongside clinic consultation.
Hepatology - liver disease - is a further sub-specialty within it, and transplant hepatology is a distinct certificate. Surgery on the same organs belongs to general and colorectal surgeons rather than to gastroenterologists.
Because the procedures can be done outside a hospital, gastroenterology has more endoscopy and ambulatory surgery centre ownership than most medical specialties. Practices are often larger and more consolidated than the specialty's headcount suggests, and the practice is usually the account rather than the individual.
Training and credentials
An internal medicine residency, a gastroenterology fellowship of about three years, then board certification.
Where they practise
Single-specialty groups with their own endoscopy centres, hospital divisions, ambulatory surgery centres, academic centres.
Gastroenterologists on the public record
Counted from what providers file about themselves, with suppression applied before anything is counted, refreshed 2026-10-05. Names, specialties and practice locations are public; work email and phone are for signed-in customers.
| State | On record | With work email | With practice phone |
|---|---|---|---|
| California | 2,851 | 2,004 70% | 2,851 |
| New York | 2,383 | 1,639 69% | 2,382 |
| Florida | 2,104 | 1,408 67% | 2,104 |
| Texas | 1,853 | 1,393 75% | 1,853 |
| Pennsylvania | 1,266 | 1,007 80% | 1,266 |
| Illinois | 1,069 | 845 79% | 1,069 |
| New Jersey | 982 | 686 70% | 981 |
| Ohio | 895 | 699 78% | 895 |
Closely related, and where to find them.
Closely related
- Internal medicine physician Adult general medicine, and the classification most sub-specialties are filed beneath.
- General surgeon The broad abdominal and trauma specialty, and the classification other surgery is filed against.
Find them
- Gastroenterologists list counts by state, the fields a record carries, a sample record.
- Physicians physician data by specialty, state and employer.
Need the list, not the definition?
A free account builds this population with your own filters and shows what each record carries before anything is bought.