William G. Kantar, M.D.
Psychiatry Physician · Newton, MA
William G. Kantar, M.D. is a psychiatry physician with a practice address in Newton, Massachusetts, and NPI 1336233642, issued on Oct 3, 2006. Check the license (Massachusetts 27796, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William G. Kantar
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 27796 MA
Self-reported in NPPES; status is on the state search - Practice location
- 382 Kenrick St, Newton, MA 02458
- Phone
- (617) 969-2084
- Enumerated
- Oct 3, 2006
- Record last updated
- Jul 25, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (617) 965-4821
- Medicaid ID
- 0144312 MA
- Medicare enrollment
- Enrolled (PECOS I20051019001079); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1962
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Verify William G. Kantar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 27796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average psychiatry physician in 2024
744 Medicare Part D claims for 48 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam153 claims
- Clonazepam105 claims
- Quetiapine Fumarate51 claims
- Dextroamphetamine-Amphetamine49 claims
- Diazepam46 claims
- Aripiprazole36 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William G. Kantar among 2,736 psychiatry physician records in Massachusetts
William G. Kantar, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 51% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1962 · median 2005 among the 1,219 with a school on file
- Record last updated2012 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 psychiatry physician records list a practice address in Newton
They are 52 of the 2,975 NPPES records with a practice address in Newton, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Newton → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Martina Albright, PHDNewton, MA 024581144210220
- Irwin Avery, M.D.Newton, MA 024581174677470
- David Diamond, MDNewton, MA 024581215912589
- Vivian Ecker, M.D.Newton, MA 024581922194927
- Shereda GrossettNewton, MA 024581659244994
- Malini Prabhu, M.D, MRCPSYCHNewton, MA 024581114205937
- Mark Strecker, M.D.Newton, MA 024581730154253
- Jeffrey Weilburg, M.D.Newton, MA 024581336135953
Common questions
What is William G. Kantar, M.D.'s NPI number?
William G. Kantar, M.D.'s National Provider Identifier (NPI) is 1336233642, issued on Oct 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William G. Kantar, M.D. located?
The NPPES record lists a practice address at 382 Kenrick St, Newton, MA, 02458. Phone: (617) 969-2084. Providers update this record themselves, so call before visiting.
How can I verify William G. Kantar, M.D.'s license?
NPPES lists Massachusetts license number 27796, 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.
How much does William G. Kantar, M.D. prescribe under Medicare Part D?
In 2024, William G. Kantar, M.D. had 744 Medicare Part D claims for 48 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
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.
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.