Quick answers
- Where does James C. O'Brien see patients?
- Medicare's clinician data lists 1 practice location in Farmington, CT. Call before your visit to confirm the address.
- What is James C. O'Brien's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Internal Medicine.
- Does James C. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says James C. O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for James C. O'Brien?
- (860) 284-4950, as listed in official Medicare / NPI Registry data.
- What is James C. O'Brien's NPI number?
- 1962465070. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where James C. O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 599 Farmington Ave, Suite 102Farmington, CT 06032 (860) 284‑4950
Group practices
Medicare enrollment lists James C. O'Brien as a member of this group (CMS data updated 2026-10-02).
- Ear Nose and Throat Institute of Connecticut PLLC26 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in Farmington
Clinicians with the same Medicare primary specialty in Farmington, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962465070 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians