Gregory Mark Brown, M.D.
NPI 1386647956ActiveIndividual· Internal Medicine· Leesburg, FL
Internal Medicine (M.D.) in Leesburg, Florida, trained at Yale University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $813,236 for 8,367 claims, against $220,877 paid for services in 2024. Exact Sciences Corporation was the largest of 4 companies reporting payments in 2025, $84.98 in all, mostly food and beverage.
Overview
| NPI | 1386647956 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 27, 2005 |
| Last updated in NPPES | Apr 2, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME0058899 | FL |
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 - Internal Medicine (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 521 |
|---|---|
| Services billed | 3,179 across 27 procedure codes |
| Paid by Medicare | $220,877 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,367 · 21,372 30-day fills |
|---|---|
| Patients | 572 |
| Total drug cost | $813,236 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Internal Medicine |
Medical group
- Legacy Healthcare Services IncGreenville, SC · 3,223 clinicians
Hospital affiliations
- Adventhealth WatermanTavares, FL
- Orlando Health South Lake HospitalClermont, FL
- Uf Health Leesburg HospitalLeesburg, FL
Other facilities
- Better @ HomeHome health agency · The Villages, FL
- Centerwell Home HealthHome health agency · The Villages, FL
- Concierge Home CareHome health agency · The Villages, FL
- Florida Homecare Specialists IncHome health agency · Lady Lake, FL
- Pinnacle Home Care of the Villages IncHome health agency · The Villages, FL
Industry payments (Open Payments)
- 2025$84.98 · 4 payments from 4 companies
- 2024$325.84 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $28.36 | 1 |
| Pfizer Inc. | $19.70 | 1 |
| Lilly USA, LLC | $19.36 | 1 |
| Merck Sharp & Dohme LLC | $17.56 | 1 |
What the 2025 payments were for
- Food and Beverage$84.98 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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