Marissa Lynn Boniszewski
Internal Medicine Physician · Williamsville, NY
Marissa Lynn Boniszewski is an internal medicine physician with a practice address in Williamsville, New York, and NPI 1780181347, issued on Apr 10, 2018. Check the license (New York 308573, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marissa Lynn Boniszewski
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 308573 NY
Self-reported in NPPES; status is on the state search - Practice location
- 325 Essjay RD, Williamsville, NY 14221
- Phone
- (716) 656-4868
- Enumerated
- Apr 10, 2018
- Record last updated
- Mar 26, 2025
- Fax
- (716) 428-2393
- Medicare enrollment
- Enrolled (PECOS I20250501002172); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 325 Essjay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marissa Lynn Boniszewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 308573Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
137 Medicare Part D claims for 63 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $93.97
4 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 50,334 providers of this specialty with any payment received $1,303.06 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
- Buffalo Medical Group, P.C.Williamsville, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa Lynn Boniszewski among 12,067 internal medicine physician records in New York
Marissa Lynn Boniszewski is one of 12,067 internal medicine physician records with a practice address in New York. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · median 2002 among the 7,221 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
64 internal medicine physician records list a practice address in Williamsville
They are 64 of the 3,530 NPPES records with a practice address in Williamsville, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Williamsville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Burnett, MDWilliamsville, NY 142211679559934
- Jeffrey Burnett, DOWilliamsville, NY 142211346226271
- Lynn Cieslak, M.D.Williamsville, NY 142211518951011
- Peter Elkin, M.D.Williamsville, NY 142211568432656
- Shuman Hua, M.D.Williamsville, NY 142211245219229
- Bonnie McMichael, M.D.Williamsville, NY 142211881692267
- Larisa Meras, M.D.Buffalo, NY 142211962474262
- Margaret Mitchell, M.D.Williamsville, NY 142211477551331
Common questions
What is Marissa Lynn Boniszewski's NPI number?
Marissa Lynn Boniszewski's National Provider Identifier (NPI) is 1780181347, issued on Apr 10, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Lynn Boniszewski located?
The NPPES record lists a practice address at 325 Essjay RD, Williamsville, NY, 14221. Phone: (716) 656-4868. Providers update this record themselves, so call before visiting.
How can I verify Marissa Lynn Boniszewski's license?
NPPES lists New York license number 308573, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marissa Lynn Boniszewski prescribe under Medicare Part D?
In 2024, Marissa Lynn Boniszewski had 137 Medicare Part D claims for 63 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Marissa Lynn Boniszewski's MIPS final score?
The 2023 MIPS final score is 91.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.