Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Thomas O'Brien, MD

Individual provider Internal Medicine Physician · NPI 1801246491

Dr. Thomas O'Brien, MD is an Infectious Disease in Warwick, Rhode Island. Graduated from Tufts University School of Medicine in 2016, 10 years ago. Practices with Affinity Physicians LLC, a 734-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
10
Trained at
Tufts University School of Medicine
Licensed in
RI
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

455 Toll Gate Rd
Warwick, RI 02886-2759
Phone: (401) 273-0641
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 593 Eddy St, Providence, RI 02903-4923 — (401) 793-2930

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence MD17913 (RI)
Internal Medicine Physician Taxonomy 207R00000X · Licence LP03709 (RI)

Record details

NPI number1801246491
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 15, 2016
Last updated in NPPESJuly 28, 2021
Certification dateJuly 28, 2021
Mailing address593 Eddy St, Providence, RI 02903-4923

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Affinity Physicians Llc. — 734 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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