Registry data as of Aug 27, 2026

Dennis O'Brien, PSY.D.

Clinical Psychologist · Milton, MA

Dennis O'Brien, PSY.D. is a clinical psychologist with a practice address in Milton, Massachusetts, and NPI 1306914221, issued on Nov 30, 2006. Check the license with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1306914221
Name
Dennis O'Brien
Credential
PSY.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
Practice location
9 Columbine RD, Milton, MA 02186
Phone
(617) 698-5714
Enumerated
Nov 30, 2006
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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Verify Dennis O'Brien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this professionCheck 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
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Clinical Psychologist providers in Massachusetts

There are 2,926 clinical psychologist records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,926 in Massachusetts → Every provider in Milton →

Other clinical psychologist records in Massachusetts

  1. Deborah Abber, PH.D.Westford, MA1568885846
  2. Mitchell Abblett, PH.D.Needham, MA1124175302
  3. Caroline Abbott, PHDBrockton, MA1699478446
  4. Roger Abdell, ED.DNewton Centre, MA1225110281
  5. Kenneth Abdul-Karim, PH.D.Mashpee, MA1689850661
  6. Tahirah Abdullah-Swain, PHDBoston, MA1306417456
  7. Susan Abelson, PH.D.Cambridge, MA1447306154
  8. Kristen Aberle, PSYDBoston, MA1619308772
  9. Gridth Ablon, PHDChesnut Hill, MA1538380480
  10. Lawrence Abrams, PH.D.Canton, MA1013985993

Common questions

What is Dennis O'Brien, PSY.D.'s NPI number?

Dennis O'Brien, PSY.D.'s National Provider Identifier (NPI) is 1306914221, issued on Nov 30, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Dennis O'Brien, PSY.D. located?

The NPPES record lists a practice address at 9 Columbine RD, Milton, MA, 02186. Phone: (617) 698-5714. Providers update this record themselves, so call before visiting.

How can I verify Dennis O'Brien, PSY.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.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.