Lazar Greenfield, M.D., PH.D.
NPI 1841286994 · Neurology Physician · Farmington, CT
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lazar Greenfield, M.D., PH.D. is a Neurology Physician provider in Farmington, CT (NPI 1841286994).
Provider details
- NPI number
- 1841286994
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35076214 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
220 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 62 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 49 | $134 |
| Measurement of Brain Wave Activity With Video (veeg), 12-26 Hours With Review and Report By Health Care Professional95720 | 29 | $210 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $95 |
| Measurement of Brain Wave Activity (eeg), 41-60 Minutes95812 | 24 | $57 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levetiracetam | 159 | 27 |
| Oxcarbazepine | 55 | — |
| Gabapentin | 53 | 12 |
| Divalproex Sodium | 51 | — |
| Lamotrigine | 50 | — |
| Carbamazepine | 46 | — |
| Lacosamide | 45 | — |
| Clobazam | 43 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-23
- Last updated
- 2022-09-29
Frequently asked questions
- What is Lazar Greenfield's NPI number?
- Lazar Greenfield's National Provider Identifier (NPI) is 1841286994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lazar Greenfield's specialty?
- Lazar Greenfield is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Lazar Greenfield located?
- Lazar Greenfield's practice location on file with NPPES is Uconn Medical Group, Farmington, CT 06030-0001.
- What is Lazar Greenfield's phone number?
- The practice phone number listed in the NPPES registry for Lazar Greenfield is (860) 679-4888.
- Does Lazar Greenfield accept Medicare?
- Lazar Greenfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lazar Greenfield's NPI active?
- Yes — Lazar Greenfield's NPI (1841286994) is active in the NPPES registry as of the last update on 2022-09-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.