Thomas Patrick O'Brien, PA-C
- Medicare patients, 2024
- 456
- Part D claims, 2024
- 201
- Medical groups
- 2
- State licenses
- 3
- Year NPI issued
- 2014
- Practice address
- 111 Grossman Dr, Braintree, MA 02184
- Practice phone
- Call (617) 421-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Harvard Vanguard Medical Associates
Braintree, Massachusetts
Find Thomas 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.
Thomas Patrick O'Brien is a surgical physician assistant in Braintree, Massachusetts
Thomas O'Brien practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts.
Thomas O'Brien's NPI, 1225447626, was assigned on August 11, 2014. Thomas O'Brien holds Massachusetts license PA7872.
- NPI
- 1225447626NPI Registry (opens in a new tab)
- NPI enumeration date
- August 11, 2014
- NPI status
- Active
- Practice phone
- (617) 421-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Thomas Patrick O'Brien practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts
Thomas O'Brien's primary practice is Harvard Vanguard Medical Associates, at 111 Grossman Dr, Braintree, MA 02184 in Norfolk County. The practice phone is (617) 421-1000.
- Harvard Vanguard Medical Associates111 Grossman Dr, Braintree, MA 02184 · Norfolk CountyPhone(617) 421-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Thomas Patrick O'Brien is affiliated with 1 site of care and 2 medical groups
Thomas O'Brien's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. The medical group on file is National Health Rehabilitation. Dmand AI also links Thomas O'Brien to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Thomas Patrick O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Thomas O'Brien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Harvard Vanguard Medical Associates | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Thomas Patrick O'Brien is one of 441 surgical physician assistants in Massachusetts
Surgical is Thomas O'Brien's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. Dmand AI has Thomas O'Brien's licenses on file in 3 states: Massachusetts, Nevada and Rhode Island.
Specialties and state licenses
- Surgical physician assistant, MassachusettsPrimary
- Physician assistant, Nevada
- Rhode Island license
Surgical physician assistants near Thomas O'Brien
Counts of surgical 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
Thomas Patrick O'Brien treated 456 Medicare patients in 2024, average age 73
CMS counts 456 Medicare patients who saw Thomas O'Brien in 2024. The largest group is 65 to 74, with 225 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 14% are also on Medicaid. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Thomas O'Brien's median patient age at 80, with 60% women.
Thomas O'Brien's Medicare patients by age, 2024
Thomas O'Brien's Medicare patients by sex, 2024
- Women29765%
- Men15935%
Chronic conditions among Thomas O'Brien's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis66%
- Anxiety26%
- Mood disorders26%
- Chronic kidney disease23%
- Diabetes23%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Thomas 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 80
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Thomas Patrick O'Brien wrote 201 Medicare Part D claims in 2024
In 2024, Thomas O'Brien wrote 201 Medicare Part D claims for 127 patients. 98% of them were for generic drugs.
Thomas O'Brien's Part D claims by kind of drug, 2024
- Generic197 claims98%
- Brand-name and other4 claims2%
Drug classes CMS tracks in Thomas O'Brien's Part D claims, 2024
- Opioids41%82 of 201 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
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Sources for Thomas Patrick 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 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) |
| 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 Thomas Patrick 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 Thomas Patrick O'Brien's NPI number?
Thomas Patrick O'Brien's NPI number is 1225447626. It was assigned on August 11, 2014, and it is active in the NPI Registry.
What does Thomas Patrick O'Brien specialize in?
Thomas Patrick O'Brien is a surgical physician assistant in Braintree, Massachusetts. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does Thomas Patrick O'Brien practice?
Thomas O'Brien practices at 111 Grossman Dr, Braintree, MA 02184. Thomas O'Brien's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. Dmand AI also links Thomas O'Brien to 1 medical group.
What is Thomas Patrick O'Brien's office phone number?
The practice phone on file for Thomas O'Brien is (617) 421-1000.
What is Thomas Patrick O'Brien's medical license number?
Thomas O'Brien holds Massachusetts license PA7872, one of the licenses on file in 3 states.
Which states has Thomas Patrick O'Brien been licensed in?
Dmand AI has state licenses on file for Thomas O'Brien in Massachusetts, Nevada and Rhode Island.
What medical group is Thomas Patrick O'Brien part of?
Thomas O'Brien is linked to National Health Rehabilitation. Dmand AI links Thomas O'Brien to 1 more medical group.
How many Medicare patients does Thomas Patrick O'Brien see?
CMS counts 456 Medicare patients who saw Thomas O'Brien in 2024, with an average age of 73.
How long has Thomas Patrick O'Brien been practicing?
Thomas O'Brien graduated from medical school in 2017, 9 years ago.
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