Michael J. O'Brien, MD
Anatomic Pathology Physician · Boston, MA
Michael J. O'Brien, MD is an anatomic pathology physician with a practice address in Boston, Massachusetts, and NPI 1700858438, issued on Feb 6, 2006. Check the license (Massachusetts 40684, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael J. O'Brien
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology Physician 207ZP0101X
- License number
- 40684 MA
Self-reported in NPPES; status is on the state search - Practice location
- 670 Albany St, Boston, MA 02118
- Phone
- (617) 414-5314
- Enumerated
- Feb 6, 2006
- Record last updated
- Oct 11, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (617) 414-5315
- Medicaid IDs
- 30204395 NH
6169813 MA - Medicare enrollment
- Enrolled (PECOS I20050407000271); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anatomic pathology physician records → All 277 in Massachusetts → Look up another NPI →
Also registered at 670 Albany St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sandra Cerda, MD.Anatomic Pathology & Clinical Pathology Physician1306819719
- Christopher Choi, MD, MPHStudent in an Organized Health Care Education/Training Program1912700725
- David Chui, MDHematology (Pathology) Physician1114990421
- Antonio De Las Morenas, MDAnatomic Pathology & Clinical Pathology Physician1184697492
Verify Michael J. 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 40684Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- South Suburban Gastroenterology PCWeymouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. O'Brien among 277 anatomic pathology physician records in Massachusetts
Michael J. O'Brien, MD is one of 277 anatomic pathology physician records with a practice address in Massachusetts. 62% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 49% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1971 · median 2000 among the 167 with a school on file
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0101X 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 Physician providers in Massachusetts
There are 277 anatomic pathology physician records in Massachusetts.
All 277 in Massachusetts → Every provider in Boston → Anatomic Pathology Physician nationwide →
The 8 anatomic pathology physician records with the nearest ZIP codes
- Ivana Delalle, M.D.Boston, MA 021181609849918
- Sara Higgins, MDBoston, MA 021181366861064
- Daniel Remick, M.D.Boston, MA 021181487736468
- Dana Semmel, M.D.Boston, MA 021181194999656
- Lubna Suaiti, MDBoston, MA 021181790312551
- Osman Yilmaz, M.D.Boston, MA 021181053744680
- Marie-Christine GuilbertBoston, MA 021161316322852
- David Basta, MD, PHDBoston, MA 021151073199519
Common questions
What is Michael J. O'Brien, MD's NPI number?
Michael J. O'Brien, MD's National Provider Identifier (NPI) is 1700858438, issued on Feb 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. O'Brien, MD located?
The NPPES record lists a practice address at 670 Albany St, Boston, MA, 02118. Phone: (617) 414-5314. Providers update this record themselves, so call before visiting.
How can I verify Michael J. O'Brien, MD's license?
NPPES lists Massachusetts license number 40684, 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.
What is Michael J. O'Brien, MD's MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.