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Dr. Troyen A. Brennan, MD
NPI1174686265
- Part D claims, 2024
- 60
- Publications
- 90
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 1 Cvs Dr, Woonsocket, RI 02895-6146
- Practice phone
- Call (401) 770-4801
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Brennan's professional email, personal email and mobile number
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Dr. Troyen A. Brennan is an internist in Woonsocket, Rhode Island
Dr. Brennan practices in Woonsocket, Rhode Island.
Dr. Brennan's NPI, 1174686265, was assigned on December 19, 2006. Dr. Brennan holds Massachusetts license 55445.
NPI and contact details
- NPI
- 1174686265NPI Registry (opens in a new tab)
- NPI enumeration date
- December 19, 2006
- NPI status
- Active
- Practice phone
- (401) 770-4801
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Troyen A. Brennan's practice address is in Woonsocket, Rhode Island
Dr. Brennan's practice address in the NPI Registry is 1 Cvs Dr, Woonsocket, RI 02895-6146. The practice phone is (401) 770-4801.
- NPI Registry address1 Cvs Dr, Woonsocket, RI 02895-6146Phone(401) 770-4801
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Troyen A. Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Brennan's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Troyen A. Brennan is one of 805 internists in Rhode Island
Internal medicine is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Brennan is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Brennan
Counts of internists 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. Troyen A. Brennan wrote 60 Medicare Part D claims in 2024
In 2024, Dr. Brennan wrote 60 Medicare Part D claims for 45 patients. 95% of them were for generic drugs. CMS names the drug for 46 of them, across 1 drug with 11 or more claims each, at $2,744 in total drug cost. In 2023, CMS named 86 claims across 1 drug.
Part D claims, 202460
Drugs named by CMS1
Total drug cost$2,744
Part D patients45
Dr. Brennan's Part D claims by kind of drug, 2024
- Generic57 claims95%
- Brand-name and other3 claims5%
Dr. Brennan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 862024: 4647%
Drugs named by CMS: 1 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Troyen A. Brennan has 90 publications on record
Dmand AI links 90 papers to Dr. Brennan, published from 2011 to 2024. 2013 was the busiest year, with 8. The most frequent topics are Assessment of Medication Adherence, Medication Adherence and Pharmacies. Dr. Brennan has published most often in Health Aff (Millwood). Dr. Brennan's most frequent co-authors are Niteesh Kumar Choudhry, MD, PhD, Michael A. Fischer, MD and Aaron S. Kesselheim, MD.
Papers90
Years published2011 to 2024
Dr. Brennan's papers by year, 2013 to 2024
Topics Dr. Brennan writes about most
- Assessment of Medication Adherence
- Medication Adherence
- Pharmacies
- Cardiovascular Diseases
- Hydroxymethylglutaryl-CoA Reductase Inhibitors
- Prescription Drugs
- Drug Costs
- Propensity Score
Dr. Brennan's most frequent co-authors
- Niteesh Kumar Choudhry, MD, PhD48 shared papers
- Michael A. Fischer, MD14 shared papers
- Aaron S. Kesselheim, MD5 shared papers
Recent publications by Dr. Brennan
JAMA Health Forum
InpatientsMedicare Part CPatient Acceptance of Health Care
COVID-19COVID-19 VaccinesPandemics
JAMA Health Forum
Insurance CarriersMedicare Part BPolicy
JAMA Netw Open
Anticholesteremic AgentsAssessment of Medication AdherenceCardiovascular Diseases
See who Dr. Brennan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Brennan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Troyen A. Brennan'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Troyen A. Brennan
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. Troyen A. Brennan's NPI number?
Dr. Troyen A. Brennan's NPI number is 1174686265. It was assigned on December 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Troyen A. Brennan?
Dr. Troyen A. Brennan is an internist in Woonsocket, Rhode Island. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Troyen A. Brennan practice?
Dr. Brennan practices at 1 Cvs Dr, Woonsocket, RI 02895-6146.
What is Dr. Troyen A. Brennan's office phone number?
The practice phone on file for Dr. Brennan is (401) 770-4801.
What is Dr. Troyen A. Brennan's medical license number?
Dr. Brennan holds Massachusetts license 55445.
What drugs does Dr. Troyen A. Brennan prescribe most?
In 2024 Medicare Part D data, Dr. Brennan's most prescribed drugs by claims were Naloxone HCl.
How long has Dr. Troyen A. Brennan been practicing?
Dr. Brennan's NPI was assigned in 2006.
Does Dr. Troyen A. Brennan do research?
Dmand AI links 90 publications to Dr. Brennan, published from 2011 to 2024.
Who does Dr. Troyen A. Brennan publish with?
Dr. Brennan's most frequent co-authors are Niteesh Kumar Choudhry, MD, PhD (48 shared papers), Michael A. Fischer, MD (14 shared papers) and Aaron S. Kesselheim, MD (5 shared papers).
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