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MR. JOHN DENIS LEONHARDT RPA
NPI 1366644544
Physician Assistant in Roslyn, NY

Active since June 01, 2007
100 PORT WASHINGTON BLVD, ROSLYN, NY 11576(516) 562-6000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mr. John Denis Leonhardt Rpa NPPES

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

MR. JOHN DENIS LEONHARDT RPA (NPI 1366644544) is an individual physician assistant in Roslyn, New York, licensed in New York (002122) and active in the NPI registry since June 2007.

NPPES Registry Identity

NPI1366644544
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. JOHN DENIS LEONHARDTCredential: RPA
Location Address100 PORT WASHINGTON BLVDRoslyn, NY 11576
Mailing Address7 Crescent PlBrentwood, NY 11717-2317 · (631) 231-5479
Phone(516) 562-6000
Sole ProprietorNo
Enumeration DateJune 1, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1366644544 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in NY · 002122
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
100 PORT WASHINGTON BLVD, Roslyn, NY 11576
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Other Providers at the Same Location NPPES 20

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

ERIN MARIE MARKEY R.N.,M.S.,APRN-BC
Nurse Practitioner (Acute Care)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6351
DR. MENA YACOUB D.O
Internal Medicine (Clinical Cardiac Electrophysiology)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (718) 689-0316
JULIA COHEN
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6000
PEDIATRIC CARDIOLOGY OF LI PC
Pediatrics (Pediatric Cardiology)
100 PORT WASHINGTON BLVD, SUITE 108
ROSLYN, NY 11576
Nassau County (516) 365-3340
PATRICK BRENNAN P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
KENNETH ZIELINSKI P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
DR. STEFAN MILTON MUEHLBAUER M.D., PHD
Emergency Medicine
100 PORT WASHINGTON BLVD, DEPT OF EMERGENCY MEDICINE
ROSLYN, NY 11576
Nassau County (165) 626-6055
MRS. MELISSA A MORELLI FNP-C
Nurse Practitioner (Family)
100 PORT WASHINGTON BLVD, ST. FRANCIS HOSPITAL EMERGENCY ROOM
ROSLYN, NY 11576
Nassau County (516) 562-6600

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 John Leonhardt's NPI number?

The NPI number for John Leonhardt is 1366644544. It was assigned to this individual provider in the NPPES registry on June 1, 2007.

Where is John Leonhardt located?

John Leonhardt practices at 100 Port Washington Blvd, Roslyn, NY 11576. The listed phone number is (516) 562-6000.

What is John Leonhardt's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for John Leonhardt was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.