Quick answers
- Which hospitals does Catherine O'Brien work at?
- Medicare's official clinician data lists Catherine O'Brien at 3 hospitals: Baystate Medical Center, Holyoke Medical Center and UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catherine O'Brien see patients?
- Medicare's clinician data lists 4 practice locations, including Worcester, MA, Springfield, MA and Holyoke, MA. Call before your visit to confirm the address.
- What is Catherine O'Brien's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Catherine O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine 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 Catherine O'Brien?
- (508) 831-1272, as listed in official Medicare / NPI Registry data.
- What is Catherine O'Brien's NPI number?
- 1235521758. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catherine O'Brien works
Medicare's Facility Affiliation Data lists Catherine O'Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baystate Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220077
- Holyoke Medical CenterHolyoke, MA · Acute Care Hospital · CCN 220024
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · CCN 220163
Practice locations
Addresses where Catherine O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 119 Belmont StWorcester, MA 01605 (508) 831‑1272
- 50 Wason Ave, Fl 2Springfield, MA 01107 (413) 794‑1800
- 55 Lake Ave NWorcester, MA 01655 (508) 334‑1000
- 575 Beech StHolyoke, MA 01040 (413) 534‑2500
Group practices
Medicare enrollment lists Catherine O'Brien as a member of these groups (CMS data updated 2026-10-02).
- UMass Memorial Medical Group Inc2,516 clinicians in the group
- Holyoke Medical Center Inc205 clinicians in the group
- Pulse Anesthesia Consultants PC16 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Massachusetts →
Other nurse anesthetists in Worcester
Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235521758 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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