Neal Jacob Schamberg, M.D.
NPI 1841458759ActiveIndividual· Internal Medicine, Gastroenterology· Greenwich, CT
Internal Medicine, Gastroenterology (M.D.) in Greenwich, Connecticut, trained at Perelman School of Med at the University of Pennsylvania (class of 2003). 712 Medicare patients in 2024, $140,486 paid; nearly all of their 1,437 Part D prescriptions were generic (91%). Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $2,897 in all, mostly food and beverage.
Overview
| NPI | 1841458759 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 28, 2008 |
| Last updated in NPPES | Aug 7, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 047732 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 712 |
|---|---|
| Services billed | 2,504 across 56 procedure codes |
| Paid by Medicare | $140,486 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,437 · 3,028 30-day fills |
|---|---|
| Patients | 408 |
| Total drug cost | $207,670 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Perelman School of Med at the University of Pennsylvania |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Connecticut Gi PLLCWallingford, CT · 248 clinicians
Hospital affiliations
- Greenwich Hospital Association -Greenwich, CT
- Stamford HospitalStamford, CT
- Yale-New Haven HospitalNew Haven, CT
Industry payments (Open Payments)
- 2025$2,897 · 133 payments from 20 companies
- 2024$3,408 · 145 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $430.61 | 20 |
| Takeda Pharmaceuticals U.S.A., Inc. | $410.47 | 14 |
| Janssen Biotech, Inc. | $363.33 | 14 |
| Madrigal Pharmaceuticals | $312.43 | 16 |
| Pfizer Inc. | $297.48 | 21 |
What the 2025 payments were for
- Food and Beverage$2,897 · 133 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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