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RPCI ONCOLOGY PC
NPI 1952703985
Internal Medicine - Hematology & Oncology in Williamsville, NY

Active since September 22, 2014CLIA Certified · 4 labs
199 PARK CLUB LN STE 200, WILLIAMSVILLE, NY 14221(716) 634-3340(716) 634-3350 Get Directions Write a Review

NPPES record last updated: June 3, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 3, 2026, Jun 11, 2025, Jul 15, 2024 and 5 more (8 updates tracked since 2019).

About Rpci Oncology Pc NPPES

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

RPCI ONCOLOGY PC (NPI 1952703985), doing business as Breast Care Of Western New York, is a healthcare organization registered as a hematology & oncology in Williamsville, New York and active in the NPI registry since September 2014. The organization holds 4 active CLIA laboratory certificates, maintains 11 additional practice locations, and lists Sharon Ann Winkler, Compliance And Privacy Officer, as its authorized official.

NPPES Registry Identity

NPI1952703985
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NameRPCI ONCOLOGY PC
Location Address199 PARK CLUB LN STE 200Williamsville, NY 14221-5269
Mailing Address199 Park Club Ln Ste 500Williamsville, NY 14221-5271 · (716) 845-1300
Phone(716) 634-3340
Fax(716) 634-3350
Organization SubpartNo
Authorized OfficialSharon Ann WinklerCompliance And Privacy Officer · (716) 845-5841
Enumeration DateSeptember 22, 2014
Last NPPES UpdateJune 3, 20268 updates tracked since enumeration
NPPES CertifiedJune 3, 2026
✔ NPI 1952703985 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 10

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedDermatologyTaxonomy 207N00000X
Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X
Also ListedObstetrics & Gynecology · Gynecologic OncologyTaxonomy 207VX0201X
Also ListedOtolaryngologyTaxonomy 207Y00000X
Also ListedSurgeryTaxonomy 208600000X
Also ListedSurgery · Surgical OncologyTaxonomy 2086X0206X
Also ListedUrologyTaxonomy 208800000X
Also ListedThoracic Surgery (Cardiothoracic Vascular Surgery)Taxonomy 208G00000X
199 PARK CLUB LN STE 200, Williamsville, NY 14221
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Other Names 12

Doing Business AsBreast Care Of Western New York
Doing Business AsCare Network Member Cheektowaga
Doing Business AsCare Network Member Lockport
Doing Business AsCare Network Member Wehrle Drive
Doing Business AsJamestown Medical Hematology And Oncology
Doing Business AsPulmonary Group Of Wny
Doing Business AsRoswell Park Dermatology
Doing Business AsRoswell Park Hematology Oncology Northtowns
Doing Business AsRoswell Park Hematology Oncology Southtowns
Doing Business AsRoswell Park Niagara Falls Boulevard
Doing Business AsSouthtowns Ent
Doing Business AsSouthtowns Multi-specialty

Secondary Practice Locations 11

Location 1310 Sterling Dr Ste 105Orchard Park, NY 14127-1500 · Phone (716) 677-9220
Location 23075 Southwestern Blvd Ste 102Orchard Park, NY 14127-1236 · Phone (716) 675-0616 · Fax (716) 675-7101
Location 310175 Niagara Falls BlvdNiagara Falls, NY 14304-2941 · Phone (716) 285-0853 · Fax (716) 322-3283
Location 46000 Brockton DrLockport, NY 14094-9273 · Phone (716) 845-3400 · Fax (716) 438-1430
Location 52150 Wehrle Dr Ste 100Williamsville, NY 14221-7099 · Phone (716) 881-9077 · Fax (716) 881-6367
Location 6100 College Pkwy Ste 110Williamsville, NY 14221-6885 · Phone (716) 631-8863 · Fax (716) 631-1265
Location 721 Porter AveJamestown, NY 14701-6247 · Phone (716) 664-1909 · Fax (716) 664-2214
Location 82560 Walden Ave Ste 107Cheektowaga, NY 14225-4757 · Phone (716) 651-0726 · Fax (716) 651-0729
Location 93041 Orchard Park Rd Ste COrchard Park, NY 14127-1238 · Phone (716) 332-6834 · Fax (716) 674-0666
Location 106420 Transit Rd Ste ADepew, NY 14043-1033 · Phone (716) 845-1600 · Fax (716) 242-0201
Location 11199 Park Club Ln Ste 100Williamsville, NY 14221-5269 · Phone (716) 332-6834 · Fax (716) 332-6856

Other Identifiers 1

Medicaid04010440NY

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter from Arkansas Health & Wellness and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rpci Oncology Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

63

Medicare enrollment records show 63 clinicians reassign Medicare billing to Rpci Oncology PC, which bills Medicare for the services they deliver. Of these, 9 practice at this address and 23 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 15

Nurse Practitioner15
Diagnostic Radiology7
Hematology/Oncology6
Pathology6
Internal Medicine4
Pulmonary Disease4
Dermatology3
General Surgery3
7 other specialties15

Nearest to this location (20)

See all 63
Marcus Dempster, MD
Internal Medicine
NPI 1881223519
199 PARK CLUB LN STE 200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
Saifuddin Soniwala, M.D.
Hematology/Oncology
NPI 1982620027
199 PARK CLUB LN #200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
Katherine Chojnicki, FNP
Nurse Practitioner
NPI 1831697713
199 PARK CLUB LN STE 200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
David Crooks, MD
General Surgery
NPI 1376615492
199 PARK CLUB LN STE 100
Williamsville, NY 14221
(716) 332-6834
✔ PECOS✔ Accepts MedicareSame address
Frederick Hong, MD
Hematology/Oncology
NPI 1366436198
199 PARK CLUB LN STE 200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
Adam Kotowski, MD
Hematology/Oncology
NPI 1992813828
199 PARK CLUB LN SUITE 200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
Michael Krabak, MD
Internal Medicine
NPI 1578557302
199 PARK CLUB LN STE 200
Williamsville, NY 14221
(716) 634-3340
✔ PECOS✔ Accepts MedicareSame address
Mariola Poss, MD
General Surgery
NPI 1669516423
199 PARK CLUB LN STE 100
Williamsville, NY 14221
(716) 332-6834
✔ PECOS✔ Accepts MedicareSame address
Margaret Tynski, NP
Nurse Practitioner
NPI 1902539653
199 PARK CLUB LN SUITE 100
Williamsville, NY 14221
(716) 332-6834
✔ PECOS✔ Accepts MedicareSame address
Ernesto Diaz Ordaz, MD
Otolaryngology
NPI 1114965738
180 PARK CLUB LN SUITE 200
Williamsville, NY 14221
(716) 634-7350
✔ PECOS✔ Accepts Medicare0.1 mi
Hartwig Boepple, M.D.
Pulmonary Disease
NPI 1568426344
100 COLLEGE PKWY SUITE 110
Williamsville, NY 14221
(716) 631-8863
✔ PECOS✔ Accepts Medicare2.0 mi
Anthony Freundel, MD
Pulmonary Disease
NPI 1881658672
100 COLLEGE PKWY SUITE 110
Williamsville, NY 14221
(716) 631-8863
✔ PECOS✔ Accepts Medicare2.0 mi
Alexander Gelfer, MD.
Pulmonary Disease
NPI 1689638462
100 COLLEGE PARKWAY SUITE 110
Williamsville, NY 14221
(716) 631-8863
✔ PECOS✔ Accepts Medicare2.0 mi
Mitchell Kerner, ANP
Nurse Practitioner
NPI 1356975940
100 COLLEGE PKWY STE 110
Williamsville, NY 14221
(716) 631-8863
✔ PECOS✔ Accepts Medicare2.0 mi
Linda Miller, FNP
Nurse Practitioner
NPI 1679530208
100 COLLEGE PKWY STE 110
Williamsville, NY 14221
(716) 681-1895
✔ PECOS✔ Accepts Medicare2.0 mi
John Deberry, M.D.
Urology
NPI 1457314197
2150 WEHRLE DR STE 100
Ambst, NY 14221
(716) 881-9077
✔ PECOS✔ Accepts Medicare2.6 mi
Marcelle Grassi, MD
Dermatology
NPI 1881690915
2560 WALDEN AVE SUITE 107
Cheektowaga, NY 14225
(716) 651-0726
✔ PECOS✔ Accepts Medicare3.9 mi
Melissa Hoffman, MD
Dermatology
NPI 1912392903
6420 TRANSIT RD STE A
Depew, NY 14043
(716) 845-1600
✔ PECOS✔ Accepts Medicare3.9 mi
Apoorva Trivedi, MD
Pathology
NPI 1386149276
6420 TRANSIT RD STE A
Depew, NY 14043
(716) 845-1600
✔ PECOS✔ Accepts Medicare3.9 mi
Andrew Soh, MD
Internal Medicine
NPI 1649276189
2157 MAIN ST
Buffalo, NY 14214
(716) 862-2700
✔ PECOS✔ Accepts Medicare4.8 mi
See all 63 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA 4

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 33D0170237

Rpci Oncology PC Dba Roswell Care Network Member Northtown · Williamsville, NY
Active · expires Mar 26, 2027
CLIA Number33D0170237
Laboratory TypePhysician Office
Certificate Effective DateJuly 25, 2016
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorDr. Adam S. Kotowski
Laboratory Phone(716) 634-3340
Laboratory LocationRpci Oncology PC Dba Roswell Care Network Member Northtown199 Park Club Lane, Suite 200, Williamsville, NY 14221
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Certificate of Waiver 33D2302052

Rpci Oncology PC - Lockport Location · Lockport, NY
Active · expires Mar 26, 2027
CLIA Number33D2302052
Laboratory TypePhysician Office
Certificate Effective DateApril 4, 2024
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorDr. Jorge A. Daza
Laboratory Phone(716) 845-3400
Laboratory LocationRpci Oncology PC - Lockport Location6000 Brockton Dr, Lockport, NY 14094
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Compliance 33D2347205

Rpci Oncology PC Dba James Medical Oncology Hemato · Jamestown, NY
Active · expires Mar 26, 2027
CLIA Number33D2347205
Laboratory TypePhysician Office
Certificate Effective DateJuly 14, 2026
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorDr. Bethany L. Burns
Laboratory Phone(716) 664-1919
Laboratory LocationRpci Oncology PC Dba James Medical Oncology Hemato21 Porter Ave, Jamestown, NY 14701
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Certificate of Compliance 33D2261388

Rpci Laboratories · Depew, NY
Active · expires Mar 26, 2027
CLIA Number33D2261388
Laboratory TypePhysician Office
Certificate Effective DateMay 31, 2022
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorPaul Bogner
Laboratory Phone(716) 845-1600
Laboratory LocationRpci Laboratories6420 Transit Rd, Depew, NY 14043
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 Rpci Oncology PC's NPI number?

The NPI number for Rpci Oncology PC is 1952703985. It was assigned to this organization in the NPPES registry on September 22, 2014. The provider is doing business as Breast Care of Western New York, Care Network Member Cheektowaga, Care Network Member Lockport and Care Network Member Wehrle Drive. Additional names are listed in the Other Names section above.

Where is Rpci Oncology PC located?

Rpci Oncology PC is located at 199 Park Club Ln Ste 200, Williamsville, NY 14221. The listed phone number is (716) 634-3340.

What is Rpci Oncology PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Rpci Oncology PC enrolled in Medicare?

Yes. Rpci Oncology PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Rpci Oncology PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 63 clinicians in 15 Medicare specialties reassign their Medicare billing to Rpci Oncology PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (15), Diagnostic Radiology (7) and Hematology/Oncology (6). Of these, 9 practice at this address and 23 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Rpci Oncology PC hold CLIA laboratory certificates?

Yes. 4 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Rpci Oncology PC accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter Health of Delaware, Ambetter from Absolute Total Care and Ambetter from Arkansas Health & Wellness and 30 other insurers list Rpci Oncology PC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Rpci Oncology PC was last updated on June 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.