Margaret E. Gruarin, PA-C
Physician Assistant · Buffalo, NY
Margaret E. Gruarin, PA-C is a physician assistant with a practice address in Buffalo, New York, and NPI 1518341882, issued on Jul 16, 2015. Check the license (New York 018801, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret E. Gruarin
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 018801 NY
Self-reported in NPPES; status is on the state search - Practice location
- Elm And Carlton Streets, Buffalo, NY 14263
- Phone
- (716) 845-2300
- Enumerated
- Jul 16, 2015
- Record last updated
- Jan 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (716) 845-7608
- Medicare enrollment
- Enrolled (PECOS I20151027002828); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at Elm And Carlton Streets
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ajay Abad, MDNeurology Physician1639311244
- Ronald Alberico, MDDiagnostic Radiology Physician1366447567
- Nikolaos Almyroudis, MDInfectious Disease Physician1962407163
- Marycatherine Aungst, FNPNurse Practitioner1881188639
- Molly Aungst, ANPNurse Practitioner1699117606
- Barbara Bambach, MDPediatric Hematology & Oncology Physician1710982418
Verify Margaret E. Gruarin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 018801Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average physician assistant in 2024
421 Medicare Part D claims for 153 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 20 claims were for opioids.
Most prescribed
- Gabapentin60 claims
- Duloxetine Hcl33 claims
- Prochlorperazine Maleate29 claims
- Eliquis28 claims
- Megestrol Acetate28 claims
- Lynparza26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Roswell Park Cancer InstituteNiagara Falls, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
488 physician assistant records list a practice address in Buffalo
They are 488 of the 13,287 NPPES records with a practice address in Buffalo, and 15,555 physician assistant records in New York.
All 488 in Buffalo → All 15,555 in New York → Every provider in Buffalo →
Other physician assistant records in New York
- Brynn Aakjar, P.A.Yonkers, NY1447592456
- Andrea Aaron, PABronx, NY1427103555
- Gabriella AaronCentral Islip, NY1790605376
- Danielle AaronsSmithtown, NY1881207520
- John AbadeerBrooklyn, NY1801434949
- Zenebou Abalo-Toga, PANew York, NY1124556154
- Kevin Alfred Abalos, PA-CCambria Heights, NY1700286424
- Clarisse AbanillaNew York, NY1598445579
- Vincent Abanilla, PA-CBrooklyn, NY1366201808
- Marie Abate, PA-CValhalla, NY1285225524
Common questions
What is Margaret E. Gruarin, PA-C's NPI number?
Margaret E. Gruarin, PA-C's National Provider Identifier (NPI) is 1518341882, issued on Jul 16, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Margaret E. Gruarin, PA-C located?
The NPPES record lists a practice address at Elm And Carlton Streets, Buffalo, NY, 14263. Phone: (716) 845-2300. Providers update this record themselves, so call before visiting.
How can I verify Margaret E. Gruarin, PA-C's license?
NPPES lists New York license number 018801, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret E. Gruarin, PA-C prescribe under Medicare Part D?
In 2024, Margaret E. Gruarin, PA-C had 421 Medicare Part D claims for 153 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.