Gregory Brennan, PA-C
Medical Physician Assistant · Boston, MA
Gregory Brennan, PA-C is a medical physician assistant with a practice address in Boston, Massachusetts, and NPI 1629300124, issued on Feb 8, 2010. Check the license (Massachusetts PA4313, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory Brennan
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- PA4313 MA
0758 NH
Self-reported in NPPES; status is on the state search - Practice location
- 147 Milk St, Boston, MA 02109
- Phone
- (617) 559-8239
- Enumerated
- Feb 8, 2010
- Entity
- Type 1 · individual
Also registered at 147 Milk St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Linda Barnard, MS, APRN-BCNurse Practitioner1710994553
- John Beneski, D.C.Chiropractor1003973058
- Karen Bikofsky, NPNurse Practitioner1720337207
Verify Gregory Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA4313Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
One hospital or facility affiliation
- Atrius Health IncNeedham, MA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Medical Physician Assistant providers in Massachusetts
There are 919 medical physician assistant records in Massachusetts.
Other medical physician assistant records in Massachusetts
- Matthew Abar, PAProvincetown, MA1760647812
- Jaime Abbiati, PA-CSpringfield, MA1396408076
- Emily Adams, PA-CBelmont, MA1538509849
- Stephanie Adamski, PA-CHolyoke, MA1265833768
- Whitney Adrien Dadaille, PA-CPeabody, MA1114743358
- Godwin Aduba, PA-CEverett, MA1841449998
- John Ahern, PA-CBoston, MA1043682776
- Amy Akland, PA-CBrookline, MA1093915795
- Katelyn Albano, PASpringfield, MA1922629039
- Grace Albert, PA-CLongmeadow, MA1881819209
Common questions
What is Gregory Brennan, PA-C's NPI number?
Gregory Brennan, PA-C's National Provider Identifier (NPI) is 1629300124, issued on Feb 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Brennan, PA-C located?
The NPPES record lists a practice address at 147 Milk St, Boston, MA, 02109. Phone: (617) 559-8239. Providers update this record themselves, so call before visiting.
How can I verify Gregory Brennan, PA-C's license?
NPPES lists Massachusetts license number PA4313, 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), loaded Aug 27, 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.
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.