Eric W. Eisenberg, MD
NPI 1427171545ActiveIndividual· Internal Medicine· Portsmouth, NH
Internal Medicine (MD) in Portsmouth, New Hampshire, trained at New York University School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $295,148 for 2,926 claims, against $3,803 paid for services in 2024. Baxter Healthcare was the largest of 7 companies reporting payments in 2025, $235.13 in all, mostly food and beverage.
Overview
| NPI | 1427171545 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 6, 2007 |
| Last updated in NPPES | Mar 26, 2024 |
| Certified by provider | Mar 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD24359 | ME |
| Internal Medicine | 207R00000X | 17915 | NH |
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 - Internal Medicine (ME); Practitioner - Family Practice (NH); Practitioner - Internal Medicine (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 104 |
|---|---|
| Services billed | 146 across 16 procedure codes |
| Paid by Medicare | $3,803 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,926 · 7,176 30-day fills |
|---|---|
| Patients | 519 |
| Total drug cost | $295,148 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | New York University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Internal Medicine |
Medical group
- Greater Seacoast Community HealthSomersworth, NH · 35 clinicians
Hospital affiliations
- Exeter Hospital IncExeter, NH
- Frisbie Memorial HospitalRochester, NH
- Portsmouth Regional HospitalPortsmouth, NH
- Wentworth-Douglass HospitalDover, NH
Industry payments (Open Payments)
- 2025$235.13 · 10 payments from 7 companies
- 2024$142.70 · 6 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Baxter Healthcare | $61.48 | 1 |
| Lilly USA, LLC | $41.19 | 2 |
| Gilead Sciences, Inc. | $38.88 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $36.70 | 2 |
| Indivior Inc. | $26.83 | 1 |
What the 2025 payments were for
- Food and Beverage$222.71 · 9 payments
- Education$12.42 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 46 internal medicine physicians in Portsmouth · All internal medicine physicians in New Hampshire