David W. Kossoff, M.D.
NPI 1629152582ActiveIndividual· Specialist· Frederick, MD
Specialist (M.D.) in Frederick, Maryland, trained at University of Maryland School of Medicine (class of 1992). 253 Medicare patients in 2024, $53,917 paid; nearly all of their 60 Part D prescriptions were generic (95%). Phathom Pharmaceuticals, Inc. was the largest of 4 companies reporting payments in 2025, $387.59 in all, mostly food and beverage.
Overview
| NPI | 1629152582 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 25, 2006 |
| Last updated in NPPES | Sep 17, 2025 |
| Certified by provider | Sep 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | D0054121 | MD |
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 (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 253 |
|---|---|
| Services billed | 518 across 16 procedure codes |
| Paid by Medicare | $53,917 |
Part D prescriptions in 2024
| Prescriptions (claims) | 60 · 138 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $13,237 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
Medical group
- David W. Kossoff, M.D., PAFrederick, MD · 5 clinicians
Hospital affiliation
- Frederick Health HospitalFrederick, MD
Industry payments (Open Payments)
- 2025$387.59 · 6 payments from 4 companies
- 2024$939.34 · 13 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $237.47 | 2 |
| Regeneron Healthcare Solutions, Inc. | $86.94 | 1 |
| Abbvie Inc. | $44.59 | 2 |
| Madrigal Pharmaceuticals | $18.59 | 1 |
What the 2025 payments were for
- Food and Beverage$387.59 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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