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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

PROGRESSIVE HEMATOLOGY AND ONCOLOGY PLLC
NPI 1114271673
Internal Medicine - Hematology & Oncology in Brooklyn, NY

Active since November 06, 2012
6201 15TH AVE STE 306, BROOKLYN, NY 11219(718) 775-2700 Get Directions Write a Review

NPPES record last updated: August 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 13, 2026, Aug 5, 2026, Dec 30, 2025 (3 updates tracked since 2025).

About Progressive Hematology And Oncology Pllc NPPES

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

PROGRESSIVE HEMATOLOGY AND ONCOLOGY PLLC (NPI 1114271673) is a healthcare organization registered as a hematology & oncology in Brooklyn, New York and active in the NPI registry since November 2012. The organization maintains 2 additional practice locations and lists Mark Sonnenschine, Chairman, as its authorized official.

NPPES Registry Identity

NPI1114271673
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NamePROGRESSIVE HEMATOLOGY AND ONCOLOGY PLLC
Location Address6201 15TH AVE STE 306Brooklyn, NY 11219-5411
Mailing Address6201 15th Ave Ste 306Brooklyn, NY 11219-5411 · (718) 775-2700
Phone(718) 775-2700
Organization SubpartNo
Authorized OfficialMark SonnenschineChairman · (718) 283-4232
Enumeration DateNovember 6, 2012
Last NPPES UpdateAugust 13, 20263 updates tracked since enumeration
NPPES CertifiedAugust 13, 2026
✔ NPI 1114271673 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 · 242242
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.
6201 15TH AVE STE 306, Brooklyn, NY 11219
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Secondary Practice Locations 2

Location 16201 15th Ave Ste 306Brooklyn, NY 11219-5411 · Phone (718) 775-2700
Location 2235 W 135th St Ste 103New York, NY 10030-2861 · Phone (718) 775-2700

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

Other Providers at the Same Location NPPES

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

DR. MARK SONNENSCHINE D.O.
Internal Medicine (Hematology & Oncology)
6201 15TH AVE STE 306
BROOKLYN, NY 11219
Kings County (718) 775-2700

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 Progressive Hematology And Oncology PLLC's NPI number?

The NPI number for Progressive Hematology And Oncology PLLC is 1114271673. It was assigned to this organization in the NPPES registry on November 6, 2012.

Where is Progressive Hematology And Oncology PLLC located?

Progressive Hematology And Oncology PLLC is located at 6201 15th Ave Ste 306, Brooklyn, NY 11219. The listed phone number is (718) 775-2700.

What is Progressive Hematology And Oncology PLLC's specialty?

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

When was this NPI record last updated?

The NPPES record for Progressive Hematology And Oncology PLLC was last updated on August 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 days 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.