Dr. Michael J. O'Brien, MD
- Medicare services, 2024
- 2,623
- Medicare patients, 2024
- 974
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 1085 Main Street, South Weymouth, MA 02190
- Practice phone
- Call (781) 331-2922
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Weymouth Endoscopy
Surgery Center - Medicare-Certified · South Weymouth, Massachusetts
Find Dr. O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Michael J. O'Brien is a pathologist in South Weymouth, Massachusetts
Dr. O'Brien practices at Weymouth Endoscopy in South Weymouth, Massachusetts.
Dr. O'Brien's NPI, 1700858438, was assigned on February 6, 2006. Dr. O'Brien holds Massachusetts license 40684.
- NPI
- 1700858438NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002705852
- NPI enumeration date
- February 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 331-2922
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael J. O'Brien practices at Weymouth Endoscopy in South Weymouth, Massachusetts
Dr. O'Brien's primary practice is Weymouth Endoscopy, at 1085 Main Street, South Weymouth, MA 02190. The practice phone is (781) 331-2922.
- Weymouth Endoscopy1085 Main Street, South Weymouth, MA 02190Phone(781) 331-2922
Source: Dmand AI Affiliation Data
Dr. Michael J. O'Brien is affiliated with 3 sites of care and 1 medical group
Dr. O'Brien's primary practice is Weymouth Endoscopy in South Weymouth, Massachusetts. Dr. O'Brien is also affiliated with Boston Medical Center. The medical group on file is South Suburban Gastroenterology. Dmand AI also links Dr. O'Brien to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael J. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Weymouth Endoscopy | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael J. O'Brien is one of 174 pathologists in Massachusetts
Anatomic pathology is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 207ZP0101X. Dr. O'Brien is licensed in Massachusetts.
Specialties and state licenses
- Anatomic pathology, MassachusettsPrimary
Pathologists near Dr. O'Brien
Counts of pathologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael J. O'Brien billed Medicare for 2,623 services in 2024
CMS data shows 2,623 Medicare services from Dr. O'Brien across 3 procedure codes in 2024, for 974 Medicare patients. Medicare paid $156,159 for them. Every service was in an office.
Dr. O'Brien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 2,9862024: 2,62312%
Dr. O'Brien compared with the Massachusetts median for pathologists, 2024
- Dr. O'Brien
- Massachusetts median
- Medicare services
- 2,623vs 1,0192.6 times
- Medicare patients
- 974vs 4532.2 times
Medians across 169 pathologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. O'Brien's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. O'Brien?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Brien and other pathologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael J. O'Brien treated 974 Medicare patients in 2024, average age 71
CMS counts 974 Medicare patients who saw Dr. O'Brien in 2024. The largest group is 65 to 74, with 633 patients. 71% of them have high cholesterol, and 61% have high blood pressure. 9% are also on Medicaid. Their average risk score is 0.75, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 56, with 50% women.
Dr. O'Brien's Medicare patients by age, 2024
Dr. O'Brien's Medicare patients by sex, 2024
- Women48950%
- Men48550%
Chronic conditions among Dr. O'Brien's Medicare patients, 2024
- High cholesterol71%
- High blood pressure61%
- Arthritis39%
- Anxiety23%
- Diabetes18%
- Mood disorders18%
- Depression16%
- Cancer15%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women50%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael J. O'Brien scored 0 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 0 out of 100 for Dr. O'Brien for performance year 2024, reported individually. Dr. O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. O'Brien's MIPS scores, performance year 2024
- 0of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 0of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Dr. Michael J. O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Michael J. O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Michael J. O'Brien's NPI number?
Dr. Michael J. O'Brien's NPI number is 1700858438. It was assigned on February 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael J. O'Brien?
Dr. Michael J. O'Brien is a pathologist in South Weymouth, Massachusetts. The primary specialty in the NPI Registry is Anatomic Pathology Physician (taxonomy code 207ZP0101X).
Where does Dr. Michael J. O'Brien practice?
Dr. O'Brien practices at 1085 Main Street, South Weymouth, MA 02190. Dr. O'Brien's primary practice is Weymouth Endoscopy in South Weymouth, Massachusetts. Dmand AI also links Dr. O'Brien to 1 group practice or clinic.
What is Dr. Michael J. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (781) 331-2922.
What is Dr. Michael J. O'Brien's medical license number?
Dr. O'Brien holds Massachusetts license 40684.
Which hospitals is Dr. Michael J. O'Brien affiliated with?
Dr. O'Brien is affiliated with Boston Medical Center.
What medical group is Dr. Michael J. O'Brien part of?
Dr. O'Brien is linked to South Suburban Gastroenterology.
Does Dr. Michael J. O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 2,623 services in 2024, and Dr. O'Brien accepts Medicare assignment.
What is Dr. Michael J. O'Brien's MIPS score?
Dr. O'Brien's MIPS final score for performance year 2024 is 0 out of 100, reported individually.
How many Medicare patients does Dr. Michael J. O'Brien see?
CMS counts 974 Medicare patients who saw Dr. O'Brien in 2024, with an average age of 71.
What services does Dr. Michael J. O'Brien bill to Medicare?
In 2024, Dr. O'Brien's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88342) and lab and pathology test (88341).
How long has Dr. Michael J. O'Brien been practicing?
Dr. O'Brien graduated from medical school in 1971, 55 years ago.
Selling to anatomic pathology practices?
See pathologists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card