Jason Haas, DO
Jason Haas, DO is a Gastroenterology in Chesterfield, Missouri. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 2008, 18 years ago. Practices with Gateway Gastroenterology Inc, a 25-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri.
- Years since qualifying
- 18
- Trained at
- At Still University of Health Sciences, College of Osteo Med, Kirksville
- Licensed in
- MO
- In the registry since
- 2008
What do these letters mean?
- DO — Doctor of Osteopathic Medicine
- A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.
Practice location Address checks out
17298 N Outer 40 Rd Ste 406Chesterfield, MO 63005-1455
Phone: (314) 529-4900
Fax: (314) 434-2679
Show map & directions
Directions in Google Maps · Apple Maps · OpenStreetMap
Pin is approximate — placed at the ZIP-code centre, not the exact door.
Additional practice locations (1)
- 1008 Greystone Manor Pkwy, Chesterfield, MO 63005-4941 — (608) 780-1566
Specialties & licences
| Gastroenterology Physician (primary) | Taxonomy 207RG0100X · Licence 2014006550 (MO) |
|---|
Record details
| NPI number | 1790948008 |
|---|---|
| Entity type | Individual (Type 1) |
| Gender | Male |
| Credentials | DO |
| Sole proprietor | No |
| NPI enumerated | July 7, 2008 |
| Last updated in NPPES | August 6, 2026 |
| Certification date | August 6, 2026 |
| Mailing address | 17298 N Outer 40 Rd Ste 200, Chesterfield, MO 63005-1456 |
Medicare enrollment
| Medicare specialty | GASTROENTEROLOGY |
|---|---|
| Medical school | AT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE |
| Graduated | 2008 (18 years in practice) |
| Group practice | Gateway Gastroenterology Inc — 25 clinicians |
| Accepts Medicare assignment | Yes — accepts the Medicare-approved amount |
Other providers in Chesterfield
-
Paul E Buse, MD
226 S Woods Mill Rd Ste 52 West, Chesterfield, MO 63017-3662 · (314) 434-2399
-
Michael J Cleary, MD
226 S Woods Mill Rd Ste 52 West, Chesterfield, MO 63017-3662 · (314) 434-2399
-
David H Cort, MD
226 S Woods Mill Rd Ste 52 West, Chesterfield, MO 63017-3662 · (314) 434-2399
-
Dr. Taylor Elizabeth Geisman, MD
17298 N Outer 40 Rd Ste 200, Chesterfield, MO 63005-1456 · (314) 529-4900
-
Dr. Dustin Garth James, MD
100 Chesterfield Business Pkwy Ste 110, Chesterfield, MO 63005-1271 · (636) 532-0990
-
Dr. Jerrold J Lander, MD
222 S Woods Mill Rd Ste 750, Chesterfield, MO 63017-3625 · (314) 205-6600
-
Jay P Marshall II, MD
224 S Woods Mill Rd Ste 500 South, Chesterfield, MO 63017 · (314) 878-6260
-
Loren H Marshall, MD
121 Saint Lukes Center Dr Ste 406, Chesterfield, MO 63017-3518 · (314) 529-4900