John Frese, M.D.
NPI 1457316382ActiveIndividual· Internal Medicine, Gastroenterology· New London, CT
Internal Medicine, Gastroenterology (M.D.) in New London, Connecticut, trained at University of Connecticut School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $283,148 for 892 claims, against $117,268 paid for services in 2024. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $2,456 in all, mostly food and beverage.
Overview
| NPI | 1457316382 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 20, 2006 |
| Last updated in NPPES | Dec 19, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 031797 | CT |
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 (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 414 |
|---|---|
| Services billed | 3,728 across 39 procedure codes |
| Paid by Medicare | $117,268 |
Part D prescriptions in 2024
| Prescriptions (claims) | 892 · 1,745 30-day fills |
|---|---|
| Patients | 364 |
| Total drug cost | $283,148 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Connecticut School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
Medical group
- Connecticut Gi PLLCWallingford, CT · 248 clinicians
Hospital affiliations
- Lawrence & Memorial HospitalNew London, CT
- William W Backus HospitalNorwich, CT
Industry payments (Open Payments)
- 2025$2,456 · 108 payments from 20 companies
- 2024$2,947 · 132 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $374.30 | 21 |
| Phathom Pharmaceuticals, Inc. | $296.14 | 15 |
| Ardelyx, Inc. | $274.39 | 11 |
| Gilead Sciences, Inc. | $257.37 | 12 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $241.26 | 11 |
What the 2025 payments were for
- Food and Beverage$2,456 · 108 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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