1. Home
  2. Directory
  3. Connecticut
  4. Farmington
  5. Psychiatry Neurology
  6. NPI Profile

DR. LAZAR JOHN GREENFIELD JR. M.D., PH.D.
NPI 1841286994
Psychiatry & Neurology - Neurology in Farmington, CT

Active since September 23, 2005PECOS EnrolledAccepts Medicare Assignment
79.34/100
CMS Quality Rating
UCONN MEDICAL GROUP, 263 FARMINGTON AVE, FARMINGTON, CT 06030(860) 679-4888(860) 679-0131 Get Directions Write a Review

NPPES record last updated: September 29, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Lazar John Greenfield Jr. M.d., Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LAZAR JOHN GREENFIELD JR. M.D., PH.D. (NPI 1841286994) is an individual neurology provider in Farmington, Connecticut, licensed in Connecticut (055487) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Virginia School Of Medicine (1989).

NPPES Registry Identity

NPI1841286994
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameDR. LAZAR JOHN GREENFIELD JR.Credential: M.D., PH.D.
Location AddressUCONN MEDICAL GROUP, 263 FARMINGTON AVEFarmington, CT 06030-0001
Mailing AddressUconn Medical Group, 263 Farmington AveFarmington, CT 06030-0001 · (860) 679-4888 · Fax (860) 679-0131
Phone(860) 679-4888
Fax(860) 679-0131
Sole ProprietorNo
Medical School CMSUniversity Of Virginia School Of MedicineGraduated 1989
Enumeration DateSeptember 23, 2005
Last NPPES UpdateSeptember 29, 2022
✔ NPI 1841286994 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
Licenses✔ Licensed in CT · 055487✔ Licensed in OH · 35076214
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
Also ListedPsychiatry & Neurology · Clinical NeurophysiologyTaxonomy 2084N0600X · License E-6501 (AR), 055487 (CT)
UCONN MEDICAL GROUP, Farmington, CT 06030
Open in Google Maps ↗

Other Identifiers 1

Medicaid2132034OH

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Lazar John Greenfield Jr. M.d., Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4385613181
PECOS Enrollment IDI20160912000298
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
49 services35 patients
Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional 95720
This procedure monitors brain wave activity over 12-26 hours using Video EEG (VEEG). It involves recording brain waves and video to detect irregularities. A healthcare professional will review the data and provide a report. It's non-invasive and safe.
29 services14 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
27 services25 patients
Measurement of brain wave activity (eeg), 41-60 minutes 95812
This procedure involves placing small sensors on your head to record your brain's electrical activity for 41-60 minutes. Known as an EEG, it helps doctors understand how your brain works, assisting in diagnosing conditions like epilepsy or sleep disorders.
24 services23 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
18 services18 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

79.34/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.22
Promoting Interoperability100
Improvement Activities40
Cost48.08

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PAULA M. MCCAULEY APRN
Nurse Practitioner (Acute Care)
UCONN MEDICAL GROUP, 263 FARMINGTON AVE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-6600
DR. ISAAC MOSS M.D.
Orthopaedic Surgery
UCONN MEDICAL GROUP, 263 FARMINGTON AVE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-6600
ALEXANDRA SHAW PA-C
Physician Assistant (Surgical)
UCONN MEDICAL GROUP, 263 FARMINGTON AVE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-6600
DR. DANIEL STEWART ROBERTS M.D
Otolaryngology
UCONN MEDICAL GROUP, 263 FARMINGTON AVENUE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-2804
MONTGOMERY BERNARD DOUGLAS M.D.
Family Medicine
UCONN MEDICAL GROUP, 263 FARMINGTON AVE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-4477
COURTNEY DANIELLE HOLMES APRN
Nurse Practitioner (Adult Health)
UCONN MEDICAL GROUP, 263 FARMINGTON AVENUE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-8400
DR. HYNES MICHAEL BIRMINGHAM SR. M.D.
Emergency Medicine
UCONN MEDICAL GROUP, 263 FARMINGTON AVENUE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-2000
ALISE FRALLICCIARDI M.D.
Emergency Medicine
UCONN MEDICAL GROUP, 263 FARMINGTON AVENUE
FARMINGTON, CT 06030
Capitol Planning Region (860) 679-2000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lazar Greenfield's NPI number?

The NPI number for Lazar Greenfield is 1841286994. It was assigned to this individual provider in the NPPES registry on September 23, 2005.

Where is Lazar Greenfield located?

Lazar Greenfield practices at Uconn Medical Group 263 Farmington Ave, Farmington, CT 06030. The listed phone number is (860) 679-4888.

What is Lazar Greenfield's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Lazar Greenfield enrolled in Medicare?

Yes. Lazar Greenfield is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Lazar Greenfield was last updated on September 29, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.