Michael J. O'Brien, PA
- Medicare patients, 2024
- 233
- Part D claims, 2024
- 647
- MIPS score, 2024
- 97
- Hospital affiliations
- 4
- Medical groups
- 9
- Practice address
- 271 Carew St, Springfield, MA 01104
- Practice phone
- Call (413) 748-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Medical Center (MA)
Springfield, Massachusetts
Find Michael 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.
Michael J. O'Brien is a physician assistant in Springfield, Massachusetts
Michael O'Brien practices at Mercy Medical Center (MA) in Springfield, Massachusetts.
Michael O'Brien's NPI, 1922625185, was assigned on July 2, 2020. Michael O'Brien holds Massachusetts license PA100930.
- NPI
- 1922625185NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799105276
- NPI enumeration date
- July 2, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 748-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Michael J. O'Brien practices at Mercy Medical Center (MA) in Springfield, Massachusetts
Michael O'Brien's primary practice is Mercy Medical Center (MA), at 271 Carew St, Springfield, MA 01104 in Hampden County. The practice phone is (413) 748-9000.
- Mercy Medical Center (MA)271 Carew St, Springfield, MA 01104 · Hampden CountyPhone(413) 748-9000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Michael J. O'Brien is affiliated with 5 sites of care and 9 medical groups
Michael O'Brien's primary practice is Mercy Medical Center (MA) in Springfield, Massachusetts. Michael O'Brien is also affiliated with Mercy Medical Center. The medical group on file is Vituity. Dmand AI also links Michael O'Brien to 3 more hospitals and 8 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Michael J. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Michael O'Brien practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Medical Center (MA) | Available with a free account |
| +4 more sites and 8 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Michael J. O'Brien is one of 3,922 physician assistants in Massachusetts
Physician assistant is Michael O'Brien's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Michael O'Brien's licenses on file in 10 states: Massachusetts, California, Connecticut, District of Columbia, Iowa, Illinois, Maryland, Michigan, Missouri and New York.
Specialties and state licenses
- Physician assistant, MassachusettsPrimary
- California license
- Connecticut license
- District of Columbia license
- Iowa license
- Illinois license
- Maryland license
- Michigan license
- Missouri license
- New York license
Physician assistants near Michael O'Brien
Counts of physician assistants 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
Michael J. O'Brien treated 233 Medicare patients in 2024, average age 68
CMS counts 233 Medicare patients who saw Michael O'Brien in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 40% are also on Medicaid. Their average risk score is 1.97, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Michael O'Brien's median patient age at 38, with 57% women.
Michael O'Brien's Medicare patients by age, 2024
Michael O'Brien's Medicare patients by sex, 2024
- Women11549%
- Men11851%
Chronic conditions among Michael O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Arthritis46%
- Anxiety42%
- Diabetes42%
- Mood disorders42%
- Depression39%
- Chronic kidney disease38%
Share of Medicare patients with each condition. A patient can have several.
Michael 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 38
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Michael J. O'Brien wrote 647 Medicare Part D claims in 2024
In 2024, Michael O'Brien wrote 647 Medicare Part D claims for 428 patients. 95% of them were for generic drugs.
Michael O'Brien's Part D claims by kind of drug, 2024
- Generic612 claims95%
- Brand-name35 claims5%
Drug classes CMS tracks in Michael O'Brien's Part D claims, 2024
- Opioids7%44 of 647 claims
- Antibiotics24%157 of 647 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Michael J. O'Brien scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Michael O'Brien for performance year 2024, reported as part of a group. Michael O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Michael O'Brien's MIPS scores, performance year 2024
- 97of 100Final score
- 90of 100Quality
- 40of 100Improvement Activities
- 78of 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
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Sources for 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - 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 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 Michael J. O'Brien's NPI number?
Michael J. O'Brien's NPI number is 1922625185. It was assigned on July 2, 2020, and it is active in the NPI Registry.
What does Michael J. O'Brien specialize in?
Michael J. O'Brien is a physician assistant in Springfield, Massachusetts. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Michael J. O'Brien practice?
Michael O'Brien practices at 271 Carew St, Springfield, MA 01104. Michael O'Brien's primary practice is Mercy Medical Center (MA) in Springfield, Massachusetts. Dmand AI also links Michael O'Brien to 3 hospitals and 8 medical groups.
What is Michael J. O'Brien's office phone number?
The practice phone on file for Michael O'Brien is (413) 748-9000.
What is Michael J. O'Brien's medical license number?
Michael O'Brien holds Massachusetts license PA100930, one of the licenses on file in 10 states.
Which states has Michael J. O'Brien been licensed in?
Dmand AI has state licenses on file for Michael O'Brien in Massachusetts, California, Connecticut, District of Columbia, Iowa, Illinois, Maryland, Michigan, Missouri and New York.
Which hospitals is Michael J. O'Brien affiliated with?
Michael O'Brien is affiliated with Mercy Medical Center. Dmand AI links Michael O'Brien to 3 more hospitals.
What medical group is Michael J. O'Brien part of?
Michael O'Brien is linked to Vituity. Dmand AI links Michael O'Brien to 8 more medical groups.
Does Michael J. O'Brien accept Medicare?
Yes. CMS lists Michael O'Brien as accepting Medicare assignment.
What is Michael J. O'Brien's MIPS score?
Michael O'Brien's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Michael J. O'Brien see?
CMS counts 233 Medicare patients who saw Michael O'Brien in 2024, with an average age of 68.
How long has Michael J. O'Brien been practicing?
Michael O'Brien graduated from medical school in 2020, 6 years ago.
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