Thomas Eisen, MD
NPI 1427044684 · Nephrology Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Eisen, MD is a Nephrology Physician provider in New Haven, CT (NPI 1427044684).
Provider details
- NPI number
- 1427044684
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 28182 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
741 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 278 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 162 | $134 |
| Hemodialysis Procedure With Physician Evaluation90935 | 83 | $73 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 80 | $377 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 47 | $86 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 93 | 24 |
| Amlodipine Besylate | 91 | 32 |
| Furosemide | 58 | 23 |
| Hydrochlorothiazide | 40 | 13 |
| Hydralazine Hcl | 34 | — |
| Dapagliflozin Propanediolbrand: Farxiga | 30 | — |
| Allopurinol | 28 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,413 across 64 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-23
- Last updated
- 2011-10-11
Frequently asked questions
- What is Thomas Eisen's NPI number?
- Thomas Eisen's National Provider Identifier (NPI) is 1427044684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Eisen's specialty?
- Thomas Eisen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Eisen located?
- Thomas Eisen's practice location on file with NPPES is 136 Sherman Ave, New Haven, CT 06511-5238.
- What is Thomas Eisen's phone number?
- The practice phone number listed in the NPPES registry for Thomas Eisen is (203) 787-0117.
- Does Thomas Eisen accept Medicare?
- Thomas Eisen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Eisen's NPI active?
- Yes — Thomas Eisen's NPI (1427044684) is active in the NPPES registry as of the last update on 2011-10-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.