Lazar John Greenfield Jr., M.D., PH.D.
NPI 1841286994ActiveIndividual· Psychiatry & Neurology, Neurology· Farmington, CT
Psychiatry & Neurology, Neurology (M.D., PH.D.) in Farmington, Connecticut, trained at University of Virginia School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $211,112 for 1,012 claims, against $22,793 paid for services in 2024.
Overview
| NPI | 1841286994 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Sep 23, 2005 |
| Last updated in NPPES | Sep 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 055487 | CT |
| Psychiatry & Neurology, Neurology | 2084N0400X | 35076214 | OH |
| Psychiatry & Neurology, Clinical Neurophysiology | 2084N0600X | E-6501 | AR |
| Psychiatry & Neurology, Clinical Neurophysiology | 2084N0600X | 055487 | 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 - Neurology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 283 across 25 procedure codes |
| Paid by Medicare | $22,793 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,012 · 1,649 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $211,112 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Virginia School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Neurology |
Medical groups
- University of Connecticut Health CenterFarmington, CT · 639 clinicians
- Bristol Hospital Multi Specialty Group, Inc.Bristol, CT · 148 clinicians
Hospital affiliations
- Bristol HospitalBristol, CT
- John Dempsey Hospital of the University of ConnectFarmington, CT
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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