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AUSUBEL & AUSUBEL PHYSICIANS, LLP
NPI 1447274063
Internal Medicine - Hematology & Oncology in Valley Stream, NY

Active since July 27, 2006
509 W MERRICK ROAD, VALLEY STREAM, NY 11580(516) 561-8188(516) 561-8192 Get Directions Write a Review

NPPES record last updated: January 6, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ausubel & Ausubel Physicians, Llp NPPES

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

AUSUBEL & AUSUBEL PHYSICIANS, LLP (NPI 1447274063), doing business as Drs Ausubel Ausubel & Bienstock Physicians, Llp, is a healthcare organization registered as a hematology & oncology in Valley Stream, New York and active in the NPI registry since July 2006. The organization lists Janet Larsen, Biller, as its authorized official.

NPPES Registry Identity

NPI1447274063
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NameAUSUBEL & AUSUBEL PHYSICIANS, LLP
Location Address509 W MERRICK ROADValley Stream, NY 11580
Mailing Address509 W Merrick RoadValley Stream, NY 11580 · (516) 561-8188 · Fax (516) 561-8192
Phone(516) 561-8188
Fax(516) 561-8192
Organization SubpartNo
Authorized OfficialJanet LarsenBiller · (516) 561-8188
Enumeration DateJuly 27, 2006
Last NPPES UpdateJanuary 6, 2023
NPPES CertifiedJanuary 6, 2023
✔ NPI 1447274063 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ 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 ListedInternal MedicineTaxonomy 207R00000X
509 W MERRICK ROAD, Valley Stream, NY 11580
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Other Names 1

Former Legal Business NameDrs Ausubel Ausubel & Bienstock Physicians, Llp

Other Identifiers 1

OtherCD7120Railroadmedicare

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)

Ausubel & Ausubel Physicians, Llp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Ausubel & Ausubel Physicians, LLP, which bills Medicare for the services this clinician delivers.

Clinician (1)

Ian Ausubel, M.D.
Internal Medicine
NPI 1588673552
509 MERRICK ROAD
Valley Stream, NY 11580
(516) 561-8188
✔ 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.

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 Ausubel & Ausubel Physicians, LLP's NPI number?

The NPI number for Ausubel & Ausubel Physicians, LLP is 1447274063. It was assigned to this organization in the NPPES registry on July 27, 2006. The provider was formerly known as Drs Ausubel Ausubel & Bienstock Physicians, LLP.

Where is Ausubel & Ausubel Physicians, LLP located?

Ausubel & Ausubel Physicians, LLP is located at 509 W Merrick Road, Valley Stream, NY 11580. The listed phone number is (516) 561-8188.

What is Ausubel & Ausubel Physicians, LLP's specialty?

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

Is Ausubel & Ausubel Physicians, LLP enrolled in Medicare?

Yes. Ausubel & Ausubel Physicians, LLP is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Ausubel & Ausubel Physicians, LLP?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Ausubel & Ausubel Physicians, LLP. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Ausubel & Ausubel Physicians, LLP was last updated on January 6, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.