Jason Haas, DO
NPI 1790948008ActiveIndividual· Internal Medicine, Gastroenterology· Chesterfield, MO
Internal Medicine, Gastroenterology (DO) in Chesterfield, Missouri, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 2008). In 2024 Medicare paid $127,770 for 446 patients, and Part D covered 635 of their prescriptions, 74% of them generic. Conmed Corporation was the largest of 3 companies reporting payments in 2024, $84.75 in all, mostly food and beverage.
Overview
| NPI | 1790948008 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jul 7, 2008 |
| Last updated in NPPES | Oct 21, 2026 |
| Certified by provider | Oct 21, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2014006550 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 446 |
|---|---|
| Services billed | 2,540 across 47 procedure codes |
| Paid by Medicare | $127,770 |
Part D prescriptions in 2024
| Prescriptions (claims) | 635 · 1,095 30-day fills |
|---|---|
| Patients | 359 |
| Total drug cost | $185,082 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Gastroenterology |
Medical group
- Gateway Gastroenterology IncChesterfield, MO · 25 clinicians
Hospital affiliations
- Missouri Baptist Medical CenterSaint Louis, MO
- St Lukes HospitalChesterfield, MO
Industry payments (Open Payments)
- 2024$84.75 · 3 payments from 3 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Conmed Corporation | $33.93 | 1 |
| Abbvie Inc. | $25.96 | 1 |
| Genzyme Corporation | $24.86 | 1 |
What the 2024 payments were for
- Food and Beverage$84.75 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 gastroenterologists in Chesterfield · All gastroenterologists in Missouri