Quick answers
- Which hospitals does Karen A. Oconnor work at?
- Medicare's official clinician data lists Karen A. Oconnor at 1 hospital: Calverthealth Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Karen A. Oconnor see patients?
- Medicare's clinician data lists 1 practice location in Prince Frederick, MD. Call before your visit to confirm the address.
- What is Karen A. Oconnor's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Karen A. Oconnor accept Medicare assignment?
- Yes. Medicare's clinician data says Karen A. Oconnor 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 Karen A. Oconnor?
- (410) 414-4767, as listed in official Medicare / NPI Registry data.
- What is Karen A. Oconnor's NPI number?
- 1861449191. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karen A. Oconnor works
Medicare's Facility Affiliation Data lists Karen A. Oconnor at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calverthealth Medical CenterPrince Frederick, MD · Acute Care Hospital · CCN 210039
Practice locations
Addresses where Karen A. Oconnor is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Hospital RdPrince Frederick, MD 20678 (410) 414‑4767
Group practices
Medicare enrollment lists Karen A. Oconnor as a member of this group (CMS data updated 2026-10-02).
- Usacs Critical Care Medicine Services East, LLC30 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Prince Frederick
Clinicians with the same Medicare primary specialty in Prince Frederick, MD — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861449191 |
| 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