Shireen F. Gadallah, M.D.
NPI 1700983863ActiveIndividual· Internal Medicine, Gastroenterology· Melbourne, FL
Internal Medicine, Gastroenterology (M.D.) in Melbourne, Florida, licensed in FL, with an NPI issued in September 2006. Their prescriptions cost Medicare Part D more than their services did: $510,599 for 1,407 claims, against $128,958 paid for services in 2024. Pfizer Inc. was the largest of 16 companies reporting payments in 2025, $1,509 in all, mostly food and beverage. Lists Holmes Regional Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1700983863 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Sep 20, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | ME79573 | 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 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 (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 450 |
|---|---|
| Services billed | 5,412 across 31 procedure codes |
| Paid by Medicare | $128,958 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,407 · 2,624 30-day fills |
|---|---|
| Patients | 269 |
| Total drug cost | $510,599 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Holmes Regional Medical CenterMelbourne, FL
- Palm Bay HospitalPalm Bay, FL
Industry payments (Open Payments)
- 2025$1,509 · 61 payments from 16 companies
- 2024$1,510 · 80 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $279.94 | 13 |
| Novo Nordisk Inc | $234.78 | 8 |
| Abbvie Inc. | $214.93 | 15 |
| Phathom Pharmaceuticals, Inc. | $193.90 | 4 |
| Gilead Sciences, Inc. | $142.19 | 2 |
What the 2025 payments were for
- Food and Beverage$1,509 · 61 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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