Thomas D. Eisen, MD
NPI 1427044684ActiveIndividual· Internal Medicine, Nephrology· New Haven, CT
Internal Medicine, Nephrology (MD) in New Haven, Connecticut, trained at New York University Medical College - Nlg (class of 1983). In 2024 Medicare paid $92,118 for 237 patients, and Part D covered 817 of their prescriptions, 89% of them generic. Novo Nordisk Inc was the largest of 21 companies reporting payments in 2025, $1,751 in all, mostly food and beverage.
Overview
| NPI | 1427044684 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 23, 2005 |
| Last updated in NPPES | Oct 11, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 28182 | 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 - Nephrology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 237 |
|---|---|
| Services billed | 5,985 across 20 procedure codes |
| Paid by Medicare | $92,118 |
Part D prescriptions in 2024
| Prescriptions (claims) | 817 · 1,975 30-day fills |
|---|---|
| Patients | 155 |
| Total drug cost | $133,783 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | New York University Medical College - Nlg |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Metabolism Associates PCNew Haven, CT · 9 clinicians
Hospital affiliations
- Bridgeport HospitalBridgeport, CT
- Yale-New Haven HospitalNew Haven, CT
Other facilities
- Fmc North Haven Dialysis CenterDialysis facility · North Haven, CT
- Fmc New Haven Home DialysisDialysis facility · New Haven, CT
- Fmc St. Raphael Dialysis Center - New HavenDialysis facility · New Haven, CT
Industry payments (Open Payments)
- 2025$1,751 · 77 payments from 21 companies
- 2024$1,413 · 65 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $212.32 | 8 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $187.71 | 8 |
| Akebia Therapeutics Inc | $166.88 | 6 |
| Travere Therapeutics, Inc. | $162.57 | 10 |
| Amgen Inc. | $148.56 | 6 |
What the 2025 payments were for
- Food and Beverage$1,745 · 73 payments
- Education$6.09 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 54 nephrologists in New Haven · All nephrologists in Connecticut