Mark Gapen, PH.D.
Psychologist · Brookline, MA
Mark Gapen, PH.D. is a psychologist with a practice address in Brookline, Massachusetts, and NPI 1467786616, issued on Sep 21, 2009. Check the license with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Gapen
- Credential
- PH.D.
- Primary taxonomy
- Psychologist 103T00000X
- Practice location
- 1269 Beacon St, Brookline, MA 02446
- Phone
- (617) 232-1303
- Enumerated
- Sep 21, 2009
- Entity
- Type 1 · individual
Also registered at 1269 Beacon St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Blaustein, PH.D.Clinical Psychologist1285739300
- Alice Connors-Kellgren, PH.D.Counseling Psychologist1295175842
- Kristen Dreyfus, M.A.Family Psychologist1952736167
- Nyssa Green, PSY.D.Mental Health Counselor1265683494
- Michelle Harris, MA, LMHC, ATRMental Health Counselor1346465747
- Anna KharazMental Health Counselor1518203181
Verify Mark Gapen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
98 psychologist records list a practice address in Brookline
They are 98 of the 2,357 NPPES records with a practice address in Brookline, and 2,367 psychologist records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 98 in Brookline → All 2,367 in Massachusetts → Every provider in Brookline →
Other psychologist records in Massachusetts
- Maura Abate, PHDNewburyport, MA1710082144
- Mitchell Abblett, PH.D.Needham, MA1124175302
- George Abbott, PHDNorthampton, MA1326103201
- Madelaine AbelBoston, MA1629622469
- John Ablon, PHDBoston, MA1629068929
- Melissa Abraham, PHDBoston, MA1942281167
- Shannon Abraham-Cook, PH.D.Worcester, MA1073860821
- Brent AbramsBedford, MA1427783307
- Danielle Abrams, PHDCambridge, MA1891358438
- John Abrams, PH.D.Andover, MA1982615811
Common questions
What is Mark Gapen, PH.D.'s NPI number?
Mark Gapen, PH.D.'s National Provider Identifier (NPI) is 1467786616, issued on Sep 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gapen, PH.D. located?
The NPPES record lists a practice address at 1269 Beacon St, Brookline, MA, 02446. Phone: (617) 232-1303. Providers update this record themselves, so call before visiting.
How can I verify Mark Gapen, PH.D.'s license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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) 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 27, 2026.