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MARISSA LYNN BONISZEWSKI
NPI 1780181347
Internal Medicine in Williamsville, NY

Active since April 10, 2018PECOS EnrolledAccepts Medicare Assignment
91.27/100
CMS Quality Rating
325 ESSJAY RD, WILLIAMSVILLE, NY 14221(716) 656-4868(716) 428-2393 Get Directions Write a Review

NPPES record last updated: March 26, 2025. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Mar 26, 2025, Jul 5, 2021, Apr 10, 2018 (3 updates tracked since 2018).

About Marissa Lynn Boniszewski NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARISSA LYNN BONISZEWSKI (NPI 1780181347) is an individual internal medicine provider in Williamsville, New York, licensed in New York (308573) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, is affiliated with Kaleida Health, and is a graduate of University Of Toledo College Of Medicine (2018).

NPPES Registry Identity

NPI1780181347
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARISSA LYNN BONISZEWSKI
Location Address325 ESSJAY RDWilliamsville, NY 14221-8243
Mailing Address425 Essjay Rd Ste 170Williamsville, NY 14221-8235 · (716) 630-1219 · Fax (716) 817-1726
Phone(716) 656-4868
Fax(716) 428-2393
Sole ProprietorNo
Medical School CMSUniversity Of Toledo College Of MedicineGraduated 2018
Enumeration DateApril 10, 2018
Last NPPES UpdateMarch 26, 20253 updates tracked since enumeration
NPPES CertifiedMarch 26, 2025
✔ NPI 1780181347 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 308573
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
325 ESSJAY RD, Williamsville, NY 14221
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marissa Lynn Boniszewski is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476890815
PECOS Enrollment IDI20250501002172
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
217 services79 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
79 services38 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
35 services35 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
34 services33 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Kaleida Health

Acute Care Hospitals · Buffalo, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330005
Location100 High StreetBuffalo, NY 14210 · Erie County
Emergency services Birthing friendly

Sisters Of Charity Hospital

Acute Care Hospitals · Buffalo, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330078
Location2157 Main StreetBuffalo, NY 14214 · Erie County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14221 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.87 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.27/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality73.6
Improvement Activities40
Cost85.96

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARIA KONTOS DO
Internal Medicine
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 656-4463
ANTHONY J RICOTTA JR. D.P.T.
Physical Therapist
325 ESSJAY RD, SUITE 305
WILLIAMSVILLE, NY 14221
Erie County (716) 631-3555
DR. LORI E. ULLMAN M.D.
Dermatology
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 630-1136
DR. SUKHWINDER SINGH KODIAL M.D.
Family Medicine (Adult Medicine)
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 630-1143
MARIA RUTH REGER PA
Physician Assistant (Medical)
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 631-3839
MANJU ALEX MD
Internal Medicine (Nephrology)
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 630-1138
MS. REEMA W BAWAB RPA-C
Physician Assistant
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 630-1146
NANCY KAWECKI
Nurse Practitioner (Family)
325 ESSJAY RD
WILLIAMSVILLE, NY 14221
Erie County (716) 857-8607

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marissa Boniszewski's NPI number?

The NPI number for Marissa Boniszewski is 1780181347. It was assigned to this individual provider in the NPPES registry on April 10, 2018.

Where is Marissa Boniszewski located?

Marissa Boniszewski practices at 325 Essjay Rd, Williamsville, NY 14221. The listed phone number is (716) 656-4868.

What is Marissa Boniszewski's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marissa Boniszewski enrolled in Medicare?

Yes. Marissa Boniszewski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Marissa Boniszewski affiliated with any hospitals?

According to CMS data, Marissa Boniszewski is affiliated with Kaleida Health and Sisters Of Charity Hospital.

When was this NPI record last updated?

The NPPES record for Marissa Boniszewski was last updated on March 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.