Quick answers
- Which hospitals does Margaret E. Gruarin work at?
- Medicare's official clinician data lists Margaret E. Gruarin at 1 hospital: Brooks-Tlc Hospital System, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Margaret E. Gruarin see patients?
- Medicare's clinician data lists 2 practice locations, including Niagara Falls, NY and Buffalo, NY. Call before your visit to confirm the address.
- What is Margaret E. Gruarin's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Margaret E. Gruarin accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret E. Gruarin 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 Margaret E. Gruarin?
- (716) 845-3500, as listed in official Medicare / NPI Registry data.
- What is Margaret E. Gruarin's NPI number?
- 1518341882. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margaret E. Gruarin works
Medicare's Facility Affiliation Data lists Margaret E. Gruarin at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Brooks-Tlc Hospital System, IncDunkirk, NY · Acute Care Hospital · CCN 330229
Practice locations
Addresses where Margaret E. Gruarin is enrolled with Medicare (CMS data updated 2026-10-02).
- 6934 Williams Rd, Suite 300Niagara Falls, NY 14304 (716) 845‑3500
- Elm and Carlton StBuffalo, NY 14263 (716) 845‑2300
Group practices
Medicare enrollment lists Margaret E. Gruarin as a member of this group (CMS data updated 2026-10-02).
- Roswell Park Cancer Institute488 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Niagara Falls
Clinicians with the same Medicare primary specialty in Niagara Falls, NY — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518341882 |
| 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