Guillermo Marrero, M.D.
NPI 1245211044ActiveIndividual· Internal Medicine· Oviedo, FL
Internal Medicine (M.D.) in Oviedo, Florida, licensed in FL, with an NPI issued in November 2005. Their prescriptions cost Medicare Part D more than their services did: $403,968 for 4,673 claims, against $52,667 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $262.56 in all, mostly food and beverage. Lists Adventhealth Orlando as a hospital affiliation.
Overview
| NPI | 1245211044 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Nov 9, 2005 |
| Last updated in NPPES | Sep 22, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME0074991 | 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 | 183 |
|---|---|
| Services billed | 899 across 19 procedure codes |
| Paid by Medicare | $52,667 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,673 · 11,235 30-day fills |
|---|---|
| Patients | 283 |
| Total drug cost | $403,968 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Internal Medicine |
Hospital affiliation
- Adventhealth OrlandoOrlando, FL
Other facilities
- Adventhealth Home HealthHome health agency · Altamonte Springs, FL
- Vitas Healthcare Corporation of FloridaHospice · Melbourne, FL
Industry payments (Open Payments)
- 2025$262.56 · 14 payments from 11 companies
- 2024$384.83 · 22 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $44.13 | 2 |
| Astrazeneca Pharmaceuticals LP | $42.10 | 2 |
| Lilly USA, LLC | $36.15 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $21.09 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $20.82 | 1 |
What the 2025 payments were for
- Food and Beverage$262.56 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 internal medicine physicians in Oviedo · All internal medicine physicians in Florida