Guy Winzenried, MD
NPI 1578500310ActiveIndividual· Internal Medicine, Gastroenterology· Naples, FL
Internal Medicine, Gastroenterology (MD) in Naples, Florida, trained at Medical College of Wisconsin (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $641,185 for 1,789 claims, against $332,821 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $908.50 in all, mostly food and beverage.
Overview
| NPI | 1578500310 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 1, 2006 |
| Last updated in NPPES | Jan 19, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | ME88304 | 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 - Gastroenterology (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,270 |
|---|---|
| Services billed | 3,566 across 46 procedure codes |
| Paid by Medicare | $332,821 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,789 · 3,035 30-day fills |
|---|---|
| Patients | 606 |
| Total drug cost | $641,185 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Hospital affiliation
- Naples Community HospitalNaples, FL
Industry payments (Open Payments)
- 2025$908.50 · 36 payments from 11 companies
- 2024$578.46 · 24 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $362.59 | 11 |
| Janssen Biotech, Inc. | $123.30 | 5 |
| Boston Scientific Corporation | $91.70 | 3 |
| Mauna Kea Technologies, Inc. | $68.77 | 3 |
| Aimmune Therapeutics, Inc. | $66.62 | 4 |
What the 2025 payments were for
- Food and Beverage$908.50 · 36 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 gastroenterologists in Naples · All gastroenterologists in Florida