Michael S. Karasik, MD
NPI 1346344967ActiveIndividual· Internal Medicine, Gastroenterology· Hartford, CT
Internal Medicine, Gastroenterology (MD) in Hartford, Connecticut, trained at University of Connecticut School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $166,390 for 582 claims, against $43,082 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $986.24 in all, mostly food and beverage.
Overview
| NPI | 1346344967 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 12, 2006 |
| Last updated in NPPES | Apr 29, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 037761 | 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 | 175 |
|---|---|
| Services billed | 306 across 42 procedure codes |
| Paid by Medicare | $43,082 |
Part D prescriptions in 2024
| Prescriptions (claims) | 582 · 939 30-day fills |
|---|---|
| Patients | 254 |
| Total drug cost | $166,390 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Connecticut School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Connecticut Gi PLLCWallingford, CT · 248 clinicians
Hospital affiliation
- Hartford HospitalHartford, CT
Industry payments (Open Payments)
- 2025$986.24 · 37 payments from 11 companies
- 2024$992.29 · 42 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $209.00 | 11 |
| Takeda Pharmaceuticals U.S.A., Inc. | $207.53 | 7 |
| Amgen Inc. | $142.98 | 2 |
| Janssen Biotech, Inc. | $95.14 | 4 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $93.26 | 4 |
What the 2025 payments were for
- Food and Beverage$976.59 · 36 payments
- Education$9.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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