Margaret Ann Lewis
NPI 1740991389ActiveIndividual· Internal Medicine, Gastroenterology· Malvern, PA
Internal Medicine, Gastroenterology in Malvern, Pennsylvania, trained at Jefferson Medical College of Thomas Jefferson University (class of 2020). In 2024 Medicare paid $38,082 for 440 patients, and Part D covered 269 of their prescriptions, 89% of them generic. Janssen Biotech, Inc. was the largest of 20 companies reporting payments in 2025, $3,420 in all, mostly food and beverage.
Overview
| NPI | 1740991389 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Dec 5, 2022 |
| Last updated in NPPES | Sep 22, 2023 |
| Certified by provider | Sep 22, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | SP023866 | PA |
| Nurse Practitioner, Family | 363LF0000X | SP023866 | PA |
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 - Nurse Practitioner (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 440 |
|---|---|
| Services billed | 538 across 8 procedure codes |
| Paid by Medicare | $38,082 |
Part D prescriptions in 2024
| Prescriptions (claims) | 269 · 659 30-day fills |
|---|---|
| Patients | 137 |
| Total drug cost | $36,131 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Nurse Practitioner |
Medical group
- Regional Gastroenterology Associates of Lancaster, Ltd.Lancaster, PA · 244 clinicians
Hospital affiliations
- Paoli HospitalPaoli, PA
- Riddle Memorial HospitalMedia, PA
Industry payments (Open Payments)
- 2025$3,420 · 160 payments from 20 companies
- 2024$2,794 · 130 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $577.77 | 29 |
| Abbvie Inc. | $519.66 | 22 |
| Takeda Pharmaceuticals U.S.A., Inc. | $435.52 | 19 |
| Ardelyx, Inc. | $340.19 | 12 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $252.15 | 11 |
What the 2025 payments were for
- Food and Beverage$3,321 · 159 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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