Kerry L. O'Brien, M.D.
Anatomic Pathology & Clinical Pathology Physician · Boston, MA
Kerry L. O'Brien, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Boston, Massachusetts, and NPI 1609856061, issued on Jan 20, 2006. Check the license (Massachusetts 249249, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kerry L. O'Brien
- Credential
- M.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License numbers
- 249249 MA
60144739 WA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (206) 351-7401
- Enumerated
- Jan 20, 2006
- Record last updated
- Jul 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120723000298); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 542 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Elijah AbassStudent in an Organized Health Care Education/Training Program1306784947
- Omar Abdel-Razek, MDInterventional Cardiology Physician1912780008
- Youssef Abdullah, MD, MBAStudent in an Organized Health Care Education/Training Program1346983442
- Najma Abdullahi, MD, MPHStudent in an Organized Health Care Education/Training Program1669213054
- Elisabeth AbelesStudent in an Organized Health Care Education/Training Program1528659760
Verify Kerry L. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 249249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kerry L. O'Brien among 542 anatomic pathology & clinical pathology physician records in Massachusetts
Kerry L. O'Brien, M.D. is one of 542 anatomic pathology & clinical pathology physician records with a practice address in Massachusetts. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 64% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2002 · median 2004 among the 305 with a school on file
- Record last updated2012 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Massachusetts
There are 542 anatomic pathology & clinical pathology physician records in Massachusetts.
All 542 in Massachusetts → Every provider in Boston → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Parul Bhargava, M.D.Boston, MA 022151871531145
- Julia Braza, M.D.Boston, MA 022151619046760
- Cynthia Hayne, M.D., PH.D.Boston, MA 022151447419478
- Jonathan Hecht, MD, PHDBoston, MA 022151386632024
- Nicole Johnson, M.D.Boston, MA 022151619901360
- Jaleh Mansouri, M.D.Boston, MA 022151023055134
- Quyen Nguyen, M.D.Boston, MA 022151831348903
- Michiya Nishino, MD, PHDBoston, MA 022151689833014
Common questions
What is Kerry L. O'Brien, M.D.'s NPI number?
Kerry L. O'Brien, M.D.'s National Provider Identifier (NPI) is 1609856061, issued on Jan 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kerry L. O'Brien, M.D. located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (206) 351-7401. Providers update this record themselves, so call before visiting.
How can I verify Kerry L. O'Brien, M.D.'s license?
NPPES lists Massachusetts license number 249249, 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. Medicare files from data.cms.gov. 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.