Leah D. Creahan, MD
NPI 1629500921ActiveIndividual· Internal Medicine, Gastroenterology· Acton, MA
Internal Medicine, Gastroenterology (MD) in Acton, Massachusetts, trained at University of Massachusetts Medical School (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $91,793 for 357 claims, against $46,974 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $2,513 in all, mostly food and beverage.
Overview
| NPI | 1629500921 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 28, 2017 |
| Last updated in NPPES | Jun 16, 2025 |
| Certified by provider | Jun 16, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 282807 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 204 |
|---|---|
| Services billed | 962 across 25 procedure codes |
| Paid by Medicare | $46,974 |
Part D prescriptions in 2024
| Prescriptions (claims) | 357 · 545 30-day fills |
|---|---|
| Patients | 170 |
| Total drug cost | $91,793 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Hallmark Health Medical Associates IncMelrose, MA · 147 clinicians
Hospital affiliations
- Melrosewakefield HealthcareMelrose, MA
- Tufts Medical CenterBoston, MA
Industry payments (Open Payments)
- 2025$2,513 · 129 payments from 23 companies
- 2024$1,871 · 78 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $420.23 | 23 |
| Takeda Pharmaceuticals U.S.A., Inc. | $328.97 | 19 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $298.42 | 27 |
| Pfizer Inc. | $197.31 | 10 |
| Gilead Sciences, Inc. | $185.74 | 7 |
What the 2025 payments were for
- Food and Beverage$2,500 · 128 payments
- Education$12.42 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in Massachusetts →