Guillermo J. Pastrana Maisonet, MD
NPI 1124307814ActiveIndividual· General Practice· San Juan, PR
General Practice (MD) with Pastrana Toledo Medical Group, LLC, practicing in San Juan, Puerto Rico. Part D covered 5,616 prescriptions written in 2024, 83% of them generic. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 4 companies reporting payments in 2025, $558.43 in all, mostly food and beverage.
Overview
| NPI | 1124307814 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 11, 2011 |
| Last updated in NPPES | Jan 25, 2024 |
| Certified by provider | Jan 25, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | 18300 | PR |
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 - General Practice (PR) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 5,616 · 11,050 30-day fills |
|---|---|
| Patients | 322 |
| Total drug cost | $551,212 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | General Practice |
Medical group
- Pastrana Toledo Medical Group, LLCSan Juan, PR · 2 clinicians
Industry payments (Open Payments)
- 2025$558.43 · 8 payments from 4 companies
- 2024$1,252 · 17 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $335.79 | 5 |
| Lilly USA, LLC | $100.00 | 1 |
| Amgen Inc. | $97.64 | 1 |
| Astrazeneca Pharmaceuticals LP | $25.00 | 1 |
What the 2025 payments were for
- Food and Beverage$558.43 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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