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STEPHEN W. KOPF, M.D., P.C.
NPI 1881990448
Internal Medicine - Cardiovascular Disease in Ossining, NY

Active since January 31, 2011
43 S HIGHLAND AVE, OSSINING, NY 10562(914) 941-0570(914) 941-0778 Get Directions Write a Review

NPPES record last updated: January 31, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Stephen W. Kopf, M.d., P.c. NPPES

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

STEPHEN W. KOPF, M.D., P.C. (NPI 1881990448) is a healthcare organization registered as a cardiovascular disease in Ossining, New York and active in the NPI registry since January 2011. The organization lists Stephen W. Kopf, President, as its authorized official.

NPPES Registry Identity

NPI1881990448
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameSTEPHEN W. KOPF, M.D., P.C.
Location Address43 S HIGHLAND AVEOssining, NY 10562-5226
Mailing Address43 S Highland AveOssining, NY 10562-5226 · (914) 941-0570 · Fax (914) 941-0778
Phone(914) 941-0570
Fax(914) 941-0778
Organization SubpartNo
Authorized OfficialStephen W. KopfPresident · (914) 941-0570
Enumeration DateJanuary 31, 2011
✔ NPI 1881990448 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in NY · NY128345
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
43 S HIGHLAND AVE, Ossining, NY 10562
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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)

Stephen W. Kopf, M.d., P.c. 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 Stephen W. Kopf, M.D., P.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Stephen Kopf, MD
Internal Medicine
NPI 1164401345
43 SOUTH HIGHLAND AVENUE
Ossining, NY 10562
(914) 941-0570
✔ 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 Stephen W. Kopf, M.D., P.C.'s NPI number?

The NPI number for Stephen W. Kopf, M.D., P.C. is 1881990448. It was assigned to this organization in the NPPES registry on January 31, 2011.

Where is Stephen W. Kopf, M.D., P.C. located?

Stephen W. Kopf, M.D., P.C. is located at 43 S Highland Ave, Ossining, NY 10562. The listed phone number is (914) 941-0570.

What is Stephen W. Kopf, M.D., P.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Stephen W. Kopf, M.D., P.C. enrolled in Medicare?

Yes. Stephen W. Kopf, M.D., P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Stephen W. Kopf, M.D., P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Stephen W. Kopf, M.D., 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Stephen W. Kopf, M.D., P.C. was last updated on January 31, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.