Quick answers
- Where does Cornelius J. Oconnor see patients?
- Medicare's clinician data lists 1 practice location in Somerville, MA. Call before your visit to confirm the address.
- What is Cornelius J. Oconnor's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Cornelius J. Oconnor accept Medicare assignment?
- Medicare's clinician data says Cornelius J. Oconnor may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Cornelius J. Oconnor?
- (617) 629-6000, as listed in official Medicare / NPI Registry data.
- What is Cornelius J. Oconnor's NPI number?
- 1295831766. 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 Cornelius J. Oconnor is enrolled with Medicare (CMS data updated 2026-10-02).
- 40 Holland StSomerville, MA 02144 (617) 629‑6000
Group practices
Medicare enrollment lists Cornelius J. Oconnor as a member of this group (CMS data updated 2026-10-02).
- Capa Anesthesia LLC70 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Somerville
Clinicians with the same Medicare primary specialty in Somerville, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1295831766 |
| 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