Quick answers
- Which hospitals does Marcella Antoniewicz work at?
- Medicare's official clinician data lists Marcella Antoniewicz at 2 hospitals: Ellis Hospital and St Peter's Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marcella Antoniewicz see patients?
- Medicare's clinician data lists 2 practice locations, including Tarrytown, NY and Scotia, NY. Call before your visit to confirm the address.
- What is Marcella Antoniewicz's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Marcella Antoniewicz accept Medicare assignment?
- Yes. Medicare's clinician data says Marcella Antoniewicz 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 Marcella Antoniewicz?
- (914) 215-4748, as listed in official Medicare / NPI Registry data.
- What is Marcella Antoniewicz's NPI number?
- 1538551197. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marcella Antoniewicz works
Medicare's Facility Affiliation Data lists Marcella Antoniewicz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ellis HospitalSchenectady, NY · Acute Care Hospital · CCN 330153
- St Peter's HospitalAlbany, NY · Acute Care Hospital · CCN 330057
Practice locations
Addresses where Marcella Antoniewicz is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 White Plains Rd, Suite 110Tarrytown, NY 10591 (914) 215‑4748
- 297 N Ballston AveScotia, NY 12302 (914) 215‑4748
Group practices
Medicare enrollment lists Marcella Antoniewicz as a member of this group (CMS data updated 2026-10-02).
- Statline Medical PC9 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Tarrytown
Clinicians with the same Medicare primary specialty in Tarrytown, NY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538551197 |
| 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