Katharine Sapienza, PA-C
Physician Assistant · Riverhead, NY
Katharine Sapienza, PA-C is a physician assistant with a practice address in Riverhead, New York, and NPI 1326757568, issued on Nov 16, 2022. Check the license with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katharine Sapienza
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 74 Commerce Dr., Riverhead, NY 11901
- Phone
- (631) 727-3422
- Enumerated
- Nov 16, 2022
- Record last updated
- Dec 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20230131001966); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 15,555 in New York → Look up another NPI →
Verify Katharine Sapienza in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average physician assistant in 2024
589 Medicare Part D claims for 294 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.
Most prescribed
- Estradiol107 claims
- Clotrimazole-Betamethasone52 claims
- Fluconazole42 claims
- Valacyclovir42 claims
- Yuvafem31 claims
- Progesterone24 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: $528.07
17 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. 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
- University Associates IN Obstetrics And Gynecology University FacultyStony Brook, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katharine Sapienza among 15,555 physician assistant records in New York
Katharine Sapienza, PA-C 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 2022, is newer than 71% of them.
- NPI issued2022 · 71% of these records are older, 23% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2022 · median 2018 among the 8,158 with a school on file
- Record last updated2022 · 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).
51 physician assistant records list a practice address in Riverhead
They are 51 of the 982 NPPES records with a practice address in Riverhead, and 15,555 physician assistant records in New York.
All 15,555 in New York → Every provider in Riverhead → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- David Berezny Jr, RPA-C, MMSRiverhead, NY 119011609938851
- Karla Brantuk, PARiverhead, NY 119011255389250
- Louise Cardellina, PA-CRiverhead, NY 119011396808465
- Jeremiah Edington, RPA-CRiverhead, NY 119011134405632
- Kathleen Egner, RPA-CRiverhead, NY 119011841343324
- Leanne Ferretti, PARiverhead, NY 119011295013092
- Kristie Gering, PHYSICIAN ASSISTANTRiverhead, NY 119011366876914
- Allison Keneski, RPA-CRiverhead, NY 119011104091024
Common questions
What is Katharine Sapienza, PA-C's NPI number?
Katharine Sapienza, PA-C's National Provider Identifier (NPI) is 1326757568, issued on Nov 16, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Katharine Sapienza, PA-C located?
The NPPES record lists a practice address at 74 Commerce Dr., Riverhead, NY, 11901. Phone: (631) 727-3422. Providers update this record themselves, so call before visiting.
How can I verify Katharine Sapienza, PA-C's license?
Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Katharine Sapienza, PA-C prescribe under Medicare Part D?
In 2024, Katharine Sapienza, PA-C had 589 Medicare Part D claims for 294 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.