Sarah Elizabeth Shannahan, M.D.
NPI 1528470143ActiveIndividual· Internal Medicine· Boston, MA
Internal Medicine (M.D.) in Boston, Massachusetts, trained at University of Massachusetts Medical School (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $228,110 for 761 claims, against $105,764 paid for services in 2024. Janssen Biotech, Inc. was the largest of 3 companies reporting payments in 2025, $324.16 in all, mostly food and beverage.
Overview
| NPI | 1528470143 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 2, 2014 |
| Last updated in NPPES | Feb 24, 2025 |
| Certified by provider | Feb 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 259668 | MA |
| Internal Medicine, Gastroenterology | 207RG0100X | 269875 | 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 | 388 |
|---|---|
| Services billed | 2,350 across 53 procedure codes |
| Paid by Medicare | $105,764 |
Part D prescriptions in 2024
| Prescriptions (claims) | 761 · 1,425 30-day fills |
|---|---|
| Patients | 177 |
| Total drug cost | $228,110 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Brigham and Womens Physicians Organization IncBoston, MA · 2,994 clinicians
- Gbgastro LLCFramingham, MA · 20 clinicians
- Greater Boston GastroenterologyFramingham, MA · 20 clinicians
Hospital affiliations
- Brigham and Women's HospitalBoston, MA
- Metrowest Medical CenterFramingham, MA
- Milford Regional Medical CenterMilford, MA
- Newton-Wellesley HospitalNewton, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$324.16 · 10 payments from 3 companies
- 2024$3,260 · 16 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $209.91 | 6 |
| Gilead Sciences, Inc. | $58.88 | 2 |
| Pfizer Inc. | $55.37 | 2 |
What the 2025 payments were for
- Food and Beverage$324.16 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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