Stephen Lawler Hasak, MD
NPI 1184063562ActiveIndividual· Internal Medicine, Gastroenterology· Saint Louis, MO
Internal Medicine, Gastroenterology (MD) in Saint Louis, Missouri, trained at Albany Medical College of Union University (class of 2013). In 2024 Medicare paid $151,600 for 533 patients, and Part D covered 377 of their prescriptions, 80% of them generic. Conmed Corporation was the largest of 11 companies reporting payments in 2025, $6,520 in all, mostly consulting fees.
Overview
| NPI | 1184063562 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 19, 2013 |
| Last updated in NPPES | Jul 2, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2015007987 | 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); Practitioner - Gastroenterology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 533 |
|---|---|
| Services billed | 1,552 across 75 procedure codes |
| Paid by Medicare | $151,600 |
Part D prescriptions in 2024
| Prescriptions (claims) | 377 · 550 30-day fills |
|---|---|
| Patients | 175 |
| Total drug cost | $100,098 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Albany Medical CollegeAlbany, NY · 1,056 clinicians
Hospital affiliations
- Albany Medical Center HospitalAlbany, NY
- Columbia Memorial HospitalHudson, NY
- Samaritan Medical CenterWatertown, NY
- Saratoga HospitalSaratoga Springs, NY
Industry payments (Open Payments)
- 2025$6,520 · 94 payments from 11 companies
- 2024$2,834 · 44 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Conmed Corporation | $4,300 | 3 |
| Janssen Biotech, Inc. | $938.06 | 38 |
| Abbvie Inc. | $413.82 | 22 |
| Phathom Pharmaceuticals, Inc. | $354.35 | 12 |
| Gilead Sciences, Inc. | $255.23 | 7 |
What the 2025 payments were for
- Consulting Fee$3,010 · 2 payments
- Food and Beverage$2,057 · 89 payments
- Travel and Lodging$1,290 · 1 payment
- Education$163.00 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 176 gastroenterologists in Saint Louis · All gastroenterologists in Missouri