Mark Eisner, MD
NPI 1902815103ActiveIndividual· Internal Medicine, Gastroenterology· Zephyrhills, FL
Internal Medicine, Gastroenterology (MD) in Zephyrhills, Florida, trained at George Washington University School of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $662,061 for 2,600 claims, against $123,598 paid for services in 2024. Abbvie Inc. was the largest of 16 companies reporting payments in 2025, $2,558 in all, mostly food and beverage.
Overview
| NPI | 1902815103 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 5, 2006 |
| Last updated in NPPES | Aug 25, 2021 |
| Certified by provider | Aug 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | ME57600 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (FL); Practitioner - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 452 |
|---|---|
| Services billed | 1,233 across 23 procedure codes |
| Paid by Medicare | $123,598 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,600 · 4,775 30-day fills |
|---|---|
| Patients | 956 |
| Total drug cost | $662,061 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Ohi West Medical Group II LLCLutz, FL · 413 clinicians
Hospital affiliations
- Adventhealth Dade CityDade City, FL
- Adventhealth TampaTampa, FL
- Adventhealth ZephyrhillsZephyrhills, FL
Industry payments (Open Payments)
- 2025$2,558 · 138 payments from 16 companies
- 2024$2,561 · 146 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $804.19 | 42 |
| Pfizer Inc. | $296.05 | 25 |
| Takeda Pharmaceuticals U.S.A., Inc. | $264.94 | 11 |
| Janssen Biotech, Inc. | $228.40 | 12 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $216.69 | 14 |
What the 2025 payments were for
- Food and Beverage$2,558 · 138 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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