Cassandra R. Duffy, M.D. M.P.H.
NPI 1770840274ActiveIndividual· Obstetrics & Gynecology, Maternal & Fetal Medicine· Boston, MA
Obstetrics & Gynecology, Maternal & Fetal Medicine (M.D. M.P.H.) in Boston, Massachusetts, licensed in MA, with an NPI issued in April 2012. Enrolled in Medicare as practitioner - obstetrics/gynecology. Janssen Research & Development, LLC was the largest of 2 companies reporting payments in 2025, $15,924 in all, mostly travel and lodging.
Overview
| NPI | 1770840274 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. M.P.H. |
| Sole proprietor | Yes |
| NPI issued | Apr 20, 2012 |
| Last updated in NPPES | Nov 19, 2025 |
| Certified by provider | Nov 19, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology, Maternal & Fetal Medicine Primary | 207VM0101X | 278272 | MA |
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 - Obstetrics/Gynecology (MA) |
|---|
Industry payments (Open Payments)
- 2025$15,924 · 11 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Research & Development, LLC | $13,604 | 10 |
| Davol Inc. | $2,320 | 1 |
What the 2025 payments were for
- Travel and Lodging$13,337 · 5 payments
- Consulting Fee$2,320 · 1 payment
- Food and Beverage$267.05 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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