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DOSIK HEMATOLOGY AND ONCOLOGY, P.C.
NPI 1851647580
Internal Medicine - Hematology & Oncology in Brooklyn, NY

Active since July 31, 2012CLIA 33D2054712 · Certificate of Compliance
500 4TH AVE, STE 1, BROOKLYN, NY 11215(718) 208-1820(718) 780-7337 Get Directions Write a Review

NPPES record last updated: September 28, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dosik Hematology And Oncology, P.c. NPPES

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

DOSIK HEMATOLOGY AND ONCOLOGY, P.C. (NPI 1851647580) is a healthcare organization registered as a hematology & oncology in Brooklyn, New York and active in the NPI registry since July 2012. The organization holds a CLIA Certificate of Compliance certificate valid through March 26, 2027 and lists David Dosik, President, as its authorized official.

NPPES Registry Identity

NPI1851647580
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NameDOSIK HEMATOLOGY AND ONCOLOGY, P.C.
Location Address500 4TH AVE, STE 1Brooklyn, NY 11215-4881
Mailing Address500 4th Ave, Ste 1Brooklyn, NY 11215-4881 · (718) 208-1820 · Fax (718) 780-7337
Phone(718) 208-1820
Fax(718) 780-7337
Organization SubpartNo
Authorized OfficialDavid DosikPresident · (718) 208-1820
Enumeration DateJuly 31, 2012
Last NPPES UpdateSeptember 28, 2021
NPPES CertifiedSeptember 28, 2021
✔ NPI 1851647580 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in NY · 187815
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.
500 4TH AVE, Brooklyn, NY 11215
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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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dosik Hematology And Oncology, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Dosik Hematology And Oncology, P.C., which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Alan Dosik, MD
Hematology/Oncology
NPI 1528010386
500 4TH AVENUE SUITE 1
Brooklyn, NY 11215
(718) 208-1820
✔ PECOS✔ Accepts MedicareSame address
David Dosik, MD
Hematology/Oncology
NPI 1770534653
500 4TH AVENUE SUITE 1
Brooklyn, NY 11205
(718) 208-1820
✔ PECOS✔ Accepts MedicareSame address
Masumeh Rafati Javidan, M.D.
Hematology/Oncology
NPI 1467699942
500 4TH AVE STE 1
Brooklyn, NY 11215
(718) 208-1820
✔ PECOS✔ Accepts MedicareSame address
Valeria Kreyner, D.O.
Hematology/Oncology
NPI 1528216264
500 4TH AVNEUE SUITE 1
Brooklyn, NY 11215
(718) 208-1820
✔ PECOS✔ Accepts MedicareSame address

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

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 33D2054712

Dosik Hematology And Oncology · Brooklyn, NY
Active · expires Mar 26, 2027
CLIA Number33D2054712
Laboratory TypeIndependent
Certificate Effective DateFebruary 15, 2020
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorDr. Alejandro R. Zuretti
Laboratory Phone(718) 208-1820
Laboratory LocationDosik Hematology And Oncology500 4th Avenue, Suite 1, Brooklyn, NY 11215
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.

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 Dosik Hematology And Oncology, P.C.'s NPI number?

The NPI number for Dosik Hematology And Oncology, P.C. is 1851647580. It was assigned to this organization in the NPPES registry on July 31, 2012.

Where is Dosik Hematology And Oncology, P.C. located?

Dosik Hematology And Oncology, P.C. is located at 500 4th Ave Ste 1, Brooklyn, NY 11215. The listed phone number is (718) 208-1820.

What is Dosik Hematology And Oncology, P.C.'s specialty?

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

Is Dosik Hematology And Oncology, P.C. enrolled in Medicare?

Yes. Dosik Hematology And Oncology, P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Dosik Hematology And Oncology, P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Hematology/Oncology, reassign their Medicare billing to Dosik Hematology And Oncology, P.C.. 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. Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Dosik Hematology And Oncology, P.C. hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 33D2054712) is associated with this NPI, valid through March 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Dosik Hematology And Oncology, P.C. was last updated on September 28, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.