Gregory Arnold Clark, M.D.
Psychiatry Physician · Belmont, MA
Gregory Arnold Clark, M.D. is a psychiatry physician with a practice address in Belmont, Massachusetts, and NPI 1396899779, issued on Jan 22, 2007. Check the license (Massachusetts 47684, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory Arnold Clark
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 47684 MA
Self-reported in NPPES; status is on the state search - Practice location
- 5 Watson RD, Belmont, MA 02478
- Phone
- (617) 484-5010
- Enumerated
- Jan 22, 2007
- Record last updated
- Feb 4, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 5 Watson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carl Brotman, M.D.Psychiatry Physician1508913708
- Anne Cole, LICSWClinical Social Worker1508937244
- Diane Englund, LICSWClinical Social Worker1427197615
- Meredith Fields, M.D.Psychiatry Physician1558301085
- Barbara Gortych, PH.D.Psychologist1124285119
- Peter Guthrie, LICSWClinical Social Worker1396952818
Verify Gregory Arnold Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 47684Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory Arnold Clark among 2,736 psychiatry physician records in Massachusetts
Gregory Arnold Clark, 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 not. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 37% newer
- In a Medicare fileNo · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2008 · 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).
151 psychiatry physician records list a practice address in Belmont
They are 151 of the 1,008 NPPES records with a practice address in Belmont, and 2,736 psychiatry physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,736 in Massachusetts → Every provider in Belmont → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Joseph Albeck, MDBelmont, MA 024781255313375
- Ross Baldessarini, MDBelmont, MA 024781487644787
- Leora Borek, M.D.Belmont, MA 024781134115553
- Craig Boyajian, M.D.Belmont, MA 024781831188200
- Marni Chanoff, MDBelmont, MA 024781013908706
- Donald Cluett, M.D.Belmont, MA 024781710969381
- Leonard Glass, MDBelmont, MA 024781639159627
- April Hirschberg, MDBelmont, MA 024781063403681
Common questions
What is Gregory Arnold Clark, M.D.'s NPI number?
Gregory Arnold Clark, M.D.'s National Provider Identifier (NPI) is 1396899779, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Arnold Clark, M.D. located?
The NPPES record lists a practice address at 5 Watson RD, Belmont, MA, 02478. Phone: (617) 484-5010. Providers update this record themselves, so call before visiting.
How can I verify Gregory Arnold Clark, M.D.'s license?
NPPES lists Massachusetts license number 47684, 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. 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.