Guillermo Manuel Guardia Gonzales, MD
NPI 1902866387ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Toledo, OH
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Promedica Multi Specialty Physicians, practicing in Toledo, Ohio. Their prescriptions cost Medicare Part D more than their services did: $2,472,274 for 6,433 claims, against $90,552 paid for services in 2024. Dexcom, Inc. was the largest of 3 companies reporting payments in 2025, $107.11 in all, mostly food and beverage. Lists Bay Park Community Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1902866387 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 28, 2006 |
| Last updated in NPPES | Nov 3, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 35095361 | OH |
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 - Endocrinology (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 665 |
|---|---|
| Services billed | 2,115 across 15 procedure codes |
| Paid by Medicare | $90,552 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,433 · 13,418 30-day fills |
|---|---|
| Patients | 932 |
| Total drug cost | $2,472,274 |
| Generic share | 42% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Endocrinology |
Medical group
- Promedica Multi Specialty PhysiciansToledo, OH · 270 clinicians
Hospital affiliations
- Bay Park Community HospitalOregon, OH
- Mercy St Vincent Medical CenterToledo, OH
- Promedica Charles and Virginia Hickman HospitalAdrian, MI
- Promedica Defiance Regional HospitalDefiance, OH
- Promedica Toledo HospitalToledo, OH
Industry payments (Open Payments)
- 2025$107.11 · 5 payments from 3 companies
- 2024$34.32 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $73.38 | 3 |
| Amgen Inc. | $20.00 | 1 |
| Ascendis Pharma Endocrinology Inc | $13.73 | 1 |
What the 2025 payments were for
- Food and Beverage$107.11 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 endocrinologists in Toledo · All endocrinologists in Ohio