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Dr. Thomas C. O'Brien, MD
NPI1801246491PAC ID4183919202
- Medicare services, 2024
- 129
- Medicare patients, 2024
- 84
- Part D claims, 2024
- 79
- Publications
- 4
- Hospital affiliations
- 2
- Practice address
- 455 Toll Gate Rd, Warwick, RI 02886
- Practice phone
- Call (401) 737-7010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Thomas C. O'Brien is an infectious disease specialist in Warwick, Rhode Island
Dr. O'Brien practices at Kent Hospital in Warwick, Rhode Island, part of Care New England Health System.
Dr. O'Brien's NPI, 1801246491, was assigned on June 15, 2016. Dr. O'Brien graduated from Tufts University School of Medicine in 2016. Dr. O'Brien holds Rhode Island license MD17913.
NPI and contact details
- NPI
- 1801246491NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183919202
- NPI enumeration date
- June 15, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (401) 737-7010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas C. O'Brien practices at Kent Hospital in Warwick, Rhode Island
Dr. O'Brien's primary practice is Kent Hospital, at 455 Toll Gate Rd, Warwick, RI 02886 in Kent County. The practice phone is (401) 737-7010.
- Kent Hospital455 Toll Gate Rd, Warwick, RI 02886 · Kent CountyPhone(401) 737-7010
Source: Dmand AI Affiliation Data
Dr. Thomas C. O'Brien is affiliated with 2 sites of care and 1 medical group
Dr. O'Brien's primary practice is Kent Hospital in Warwick, Rhode Island, part of Care New England Health System. Dr. O'Brien is also affiliated with The Miriam Hospital. The medical group on file is Care New England Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas C. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kent Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas C. O'Brien is one of 56 infectious disease specialists in Rhode Island
Infectious disease is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. O'Brien is licensed in Rhode Island.
Specialties and state licenses
- Infectious disease, Rhode IslandPrimary
Infectious disease specialists near Dr. O'Brien
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
56infectious disease specialists in Rhode Island
3infectious disease specialists in Warwick
3infectious disease specialists at Kent HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas C. O'Brien billed Medicare for 129 services in 2024
CMS data shows 129 Medicare services from Dr. O'Brien across 4 procedure codes in 2024, for 84 Medicare patients. Medicare paid $11,797 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024129
Medicare patients84
Paid by Medicare$11,797
Procedure codes4
Dr. O'Brien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2042024: 12937%
Dr. O'Brien compared with the Rhode Island median for infectious disease specialists, 2024
- Dr. O'Brien
- Rhode Island median
- Medicare services
- 129vs 9142% above
- Medicare patients
- 84vs 6627% above
- Part D claims
- 147vs 10836% above
Medians across 55 infectious disease specialists in Rhode Island 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Brien and other infectious disease specialists in Rhode Island.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas C. O'Brien treated 84 Medicare patients in 2024, average age 75
CMS counts 84 Medicare patients who saw Dr. O'Brien in 2024. The largest group is 75 to 84, with 34 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 3.90, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 71, with 53% women.
Medicare patients, 202484
Average age75
Average risk score3.90
Also on Medicaid21%
Dr. O'Brien's Medicare patients by age, 2024
Dr. O'Brien's Medicare patients by sex, 2024
- Women3845%
- Men4655%
Chronic conditions among Dr. O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Ischemic heart disease57%
- Anxiety56%
- Diabetes56%
- Mood disorders55%
- Chronic kidney disease54%
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 71
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas C. O'Brien wrote 79 Medicare Part D claims in 2024
In 2024, Dr. O'Brien wrote 79 Medicare Part D claims for 36 patients. 85% of them were for generic drugs. They cover 8 drugs, with $38,706 in total drug cost. In 2022, CMS named 74 claims across 5 drugs.
Part D claims, 202479
Drugs named by CMS8
Total drug cost$38,706
Part D patients36
Dr. O'Brien's Part D claims by kind of drug, 2024
- Generic67 claims85%
- Brand-name12 claims15%
Dr. O'Brien's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. O'Brien's Part D claims, 2024
- Antibiotics47%37 of 79 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 742023: 14799%
Drugs named by CMS: 8 in 2023, 5 in 2022.
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
How Dr. Thomas C. O'Brien takes part in Medicare
Dr. O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas C. O'Brien has 4 publications on record
Dmand AI links 4 papers to Dr. O'Brien, published from 2017 to 2022. Dr. O'Brien's most frequent co-authors are Alexander Michael Abud, MD and Hadeel Zainah, MD.
Papers4
Years published2017 to 2022
Dr. O'Brien's most frequent co-authors
Recent publications by Dr. O'Brien
J Pers Soc Psychol
AggressionArmed ConflictsBelgium
Child BehaviorChileHispanic or Latino
See who Dr. O'Brien researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Brien works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas C. O'Brien received $15 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. O'Brien from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $15.
Companies that paid Dr. O'Brien the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas C. O'Brien graduated from Tufts University School of Medicine
Dr. O'Brien graduated from Tufts University School of Medicine in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas C. 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) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Thomas C. 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. Thomas C. O'Brien's NPI number?
Dr. Thomas C. O'Brien's NPI number is 1801246491. It was assigned on June 15, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas C. O'Brien?
Dr. Thomas C. O'Brien is an infectious disease specialist in Warwick, Rhode Island. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Thomas C. O'Brien practice?
Dr. O'Brien practices at 455 Toll Gate Rd, Warwick, RI 02886. Dr. O'Brien's primary practice is Kent Hospital in Warwick, Rhode Island, part of Care New England Health System.
What is Dr. Thomas C. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (401) 737-7010.
What is Dr. Thomas C. O'Brien's medical license number?
Dr. O'Brien holds Rhode Island license MD17913.
Which hospitals is Dr. Thomas C. O'Brien affiliated with?
Dr. O'Brien practices at Kent Hospital in Warwick, Rhode Island. Dr. O'Brien is also affiliated with The Miriam Hospital.
What medical group is Dr. Thomas C. O'Brien part of?
Dr. O'Brien is linked to Care New England Medical Group.
Does Dr. Thomas C. O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 129 services in 2024, and Dr. O'Brien accepts Medicare assignment.
How many Medicare patients does Dr. Thomas C. O'Brien see?
CMS counts 84 Medicare patients who saw Dr. O'Brien in 2024, with an average age of 75.
What services does Dr. Thomas C. O'Brien bill to Medicare?
In 2024, Dr. O'Brien's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99233) and hospital inpatient care (99223).
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Where did Dr. Thomas C. O'Brien go to medical school?
Dr. O'Brien graduated from Tufts University School of Medicine in 2016.
What drugs does Dr. Thomas C. O'Brien prescribe most?
In 2023 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Ethambutol HCl, Vancomycin HCl and Amikacin Sulfate.
Has Dr. Thomas C. O'Brien received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. O'Brien from 1 company from 2018 to 2018. The largest total came from Gilead Sciences, Inc.
How long has Dr. Thomas C. O'Brien been practicing?
Dr. O'Brien graduated from medical school in 2016, 10 years ago.
Does Dr. Thomas C. O'Brien do research?
Dmand AI links 4 publications to Dr. O'Brien, published from 2017 to 2022.
Who does Dr. Thomas C. O'Brien publish with?
Dr. O'Brien's most frequent co-authors are Alexander Michael Abud, MD (1 shared paper) and Hadeel Zainah, MD (1 shared paper).
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