NPPES file of Aug 9, 2026

Harold L. Lazar, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Boston, MA

Harold L. Lazar, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Boston, Massachusetts, and NPI 1205876372, issued on Jun 7, 2006. Check the license (Massachusetts 51809, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1205876372
Name
Harold L. Lazar
Credential
M.D.
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
51809 MA
Self-reported in NPPES; status is on the state search
Practice location
732 Harrison Ave, Boston, MA 02118
Phone
(617) 638-5600
Enumerated
Jun 7, 2006
Record last updated
Jun 16, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(617) 638-7228
Medicaid ID
110064108A MA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 732 Harrison Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Maitri Acharekar, MDStudent in an Organized Health Care Education/Training Program1255020715
  2. Adeboye Adewoye, M.D.Medical Oncology Physician1316920838
  3. Eric Awtry, M.D.Cardiovascular Disease Physician1922084839
  4. Megan Barnett, RD, LDN, CNSCRegistered Dietitian1083919153
  5. Katy Bockstall, M.D.Cardiovascular Disease Physician1952676058
  6. John Bostrom, M.D.Cardiovascular Disease Physician1477087021

Verify Harold L. Lazar in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 51809    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

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Industry payments in 2024: $1,919.28

3 payments; by number, the most common kind was consulting fee; the largest payer was Edwards Lifesciences Corporation. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Harold Lazar$1,919.28
  2. Specialty average$7,828.84

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Massachusetts

There are 228 thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts.

All 228 in Massachusetts → Every provider in Boston →

Other thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts

  1. Ibrahim Abdelmoneim, MDBoston, MA1447196845
  2. Mohamed Abdelrahman, MDBoston, MA1558050591
  3. Alfred Adegboyegun, MDSpringfield, MA1205953957
  4. Arvind Agnihotri, MDBrighton, MA1528058625
  5. Nathan Airhart, MDSpringfield, MA1851611008
  6. Cary Akins, MDBoston, MA1447231899
  7. James Allan, MDBoston, MA1699765859
  8. Timothy Anderson, MDNorwood, MA1275527806
  9. Sary Aranki, MDBoston, MA1881639102
  10. Hugh Auchincloss, M.D.Boston, MA1003076522

Common questions

What is Harold L. Lazar, M.D.'s NPI number?

Harold L. Lazar, M.D.'s National Provider Identifier (NPI) is 1205876372, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Harold L. Lazar, M.D. located?

The NPPES record lists a practice address at 732 Harrison Ave, Boston, MA, 02118. Phone: (617) 638-5600. Providers update this record themselves, so call before visiting.

How can I verify Harold L. Lazar, M.D.'s license?

NPPES lists Massachusetts license number 51809, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.