Gordon Daniel Liss, MD
NPI 1669620746ActiveIndividual· Internal Medicine, Gastroenterology· Frederick, MD
Internal Medicine, Gastroenterology (MD) in Frederick, Maryland, trained at Georgetown University School of Medicine (class of 2004). In 2024 Medicare paid $632,073 for 605 patients, and Part D covered 604 of their prescriptions, 87% of them generic. Pfizer Inc. was the largest of 11 companies reporting payments in 2025, $655.11 in all, mostly food and beverage.
Overview
| NPI | 1669620746 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Sep 3, 2008 |
| Last updated in NPPES | Apr 6, 2021 |
| Certified by provider | Nov 10, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD0070283 | MD |
| Internal Medicine, Gastroenterology | 207RG0100X | C168998 | CA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 605 |
|---|---|
| Services billed | 27,225 across 110 procedure codes |
| Paid by Medicare | $632,073 |
Part D prescriptions in 2024
| Prescriptions (claims) | 604 · 903 30-day fills |
|---|---|
| Patients | 297 |
| Total drug cost | $38,598 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Scripps HealthLa Jolla, CA · 1,433 clinicians
Hospital affiliations
- Scripps Green HospitalLa Jolla, CA
- Scripps Memorial Hospital - EncinitasEncinitas, CA
- Scripps Memorial Hospital la JollaLa Jolla, CA
Industry payments (Open Payments)
- 2025$655.11 · 24 payments from 11 companies
- 2024$1,135 · 42 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $215.73 | 10 |
| Aimmune Therapeutics, Inc. | $125.00 | 1 |
| Regeneron Healthcare Solutions, Inc. | $80.07 | 3 |
| Takeda Pharmaceuticals U.S.A., Inc. | $61.52 | 2 |
| Abbvie Inc. | $41.75 | 2 |
What the 2025 payments were for
- Food and Beverage$655.11 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 gastroenterologists in Frederick · All gastroenterologists in Maryland