Gary Brett Gastman, PH.D.
Clinical Psychologist · Lowell, MA
Gary Brett Gastman, PH.D. is a clinical psychologist with a practice address in Lowell, Massachusetts, and NPI 1689709032, issued on Feb 23, 2007. Check the license (Massachusetts 6954, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gary Brett Gastman
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 6954 MA
Self-reported in NPPES; status is on the state search - Practice location
- 35 Market St, Lowell, MA 01852
- Phone
- (978) 459-0389
- Enumerated
- Feb 23, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (978) 459-7642
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 3,185 in Massachusetts → Look up another NPI →
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Verify Gary Brett Gastman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 6954Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gary Brett Gastman among 3,185 clinical psychologist records in Massachusetts
Gary Brett Gastman, PH.D. is one of 3,185 clinical psychologist records with a practice address in Massachusetts. 12% 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 30% of them.
- NPI issued2007 · 30% of these records are older, 50% newer
- In a Medicare fileNo · 12% of these records are
- In the CMS Doctors and Clinicians fileNo · 24% of these records are
- Record last updated2007 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Psychologist providers in Massachusetts
There are 3,185 clinical psychologist records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,185 in Massachusetts → Every provider in Lowell → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Hannah Bashian, PH.D.Lowell, MA 018521013637685
- Maria Cunio, PH.D.Lowell, MA 018521316119894
- Marlene Davis, PHDLowell, MA 018521780741561
- Barbara Day, PSYD, MSWLowell, MA 018521750478541
- Le Doan, PH.D.Lowell, MA 018521659365146
- Randi Dorn, ED.D., ABPPLowell, MA 018521316908841
- Shannon McCleery, PSYDLowell, MA 018521962199968
- Kevin Oleary, PSYDLowell, MA 018521073109328
Common questions
What is Gary Brett Gastman, PH.D.'s NPI number?
Gary Brett Gastman, PH.D.'s National Provider Identifier (NPI) is 1689709032, issued on Feb 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gary Brett Gastman, PH.D. located?
The NPPES record lists a practice address at 35 Market St, Lowell, MA, 01852. Phone: (978) 459-0389. Providers update this record themselves, so call before visiting.
How can I verify Gary Brett Gastman, PH.D.'s license?
NPPES lists Massachusetts license number 6954, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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. 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.