Katherine Sumner, R-PAC
Physician Assistant · Williamsville, NY
Katherine Sumner, R-PAC is a physician assistant with a practice address in Williamsville, New York, and NPI 1033500988, issued on Feb 13, 2015. Check the license (New York 018399, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Sumner
- Credential
- R-PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 018399 NY
Self-reported in NPPES; status is on the state search - Practice location
- 18 Limestone Dr, Williamsville, NY 14221
- Phone
- (716) 632-1400
- Enumerated
- Feb 13, 2015
- Record last updated
- Feb 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (716) 632-5316
- Medicare enrollment
- Enrolled (PECOS I20150327001573); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 15,555 in New York → Look up another NPI →
Also registered at 18 Limestone Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zhipei Fu, ACUPUNCTURISTAcupuncturist1760551675
- Jacqueline Labelle, R-PACPhysician Assistant1033450143
- Madiha Mirza, MDPsychiatry Physician1295854362
- Talia Root, PAPhysician Assistant1184624348
Verify Katherine Sumner 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 018399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11.5 times the Medicare Part D claims of the average physician assistant in 2024
9,571 Medicare Part D claims for 1,629 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 82 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium611 claims
- Amlodipine Besylate451 claims
- Atorvastatin Calcium407 claims
- Metoprolol Succinate307 claims
- Levothyroxine Sodium276 claims
- Pantoprazole Sodium247 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.
Industry payments in 2024: $166.27
5 payments; by number, the most common kind was food and beverage; the largest payer was Solventum Corporation. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- General Physician PCDunkirk, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Sumner among 15,555 physician assistant records in New York
Katherine Sumner, R-PAC is one of 15,555 physician assistant records with a practice address in New York. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 40% of them.
- NPI issued2015 · 40% of these records are older, 57% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2014 · median 2018 among the 8,158 with a school on file
- Record last updated2015 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
178 physician assistant records list a practice address in Williamsville
They are 178 of the 3,530 NPPES records with a practice address in Williamsville, and 15,555 physician assistant records in New York.
All 15,555 in New York → Every provider in Williamsville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Gregory Czajka, RPA CWilliamsville, NY 142211740265537
- Tammy Ervolina-Kroll, RPA-CWilliamsville, NY 142211801852777
- Allison Fout, PAWilliamsville, NY 142211275501348
- Jill Hess, PAWilliamsville, NY 142211063471407
- Cara Innus, RPA-CWilliamsville, NY 142211538126388
- Jennifer Kielbasa, RPA CWilliamsville, NY 142211942283031
- Sherry Lyons, RPA-CWilliamsville, NY 142211134109903
- Robin Massing, RPA-CWilliamsville, NY 142211801869284
Common questions
What is Katherine Sumner, R-PAC's NPI number?
Katherine Sumner, R-PAC's National Provider Identifier (NPI) is 1033500988, issued on Feb 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Sumner, R-PAC located?
The NPPES record lists a practice address at 18 Limestone Dr, Williamsville, NY, 14221. Phone: (716) 632-1400. Providers update this record themselves, so call before visiting.
How can I verify Katherine Sumner, R-PAC's license?
NPPES lists New York license number 018399, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine Sumner, R-PAC prescribe under Medicare Part D?
In 2024, Katherine Sumner, R-PAC had 9,571 Medicare Part D claims for 1,629 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.