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SIENA EMERGENCY MEDICAL SERVICES, P.C.
NPI 1356507099
Emergency Medicine in Smithtown, NY

Active since August 01, 2008
50 ROUTE 25A, SMITHTOWN, NY 11787(844) 474-4019(631) 514-7601 Get Directions Write a Review

NPPES record last updated: February 24, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 24, 2023, Jul 30, 2020, Jan 12, 2019 (3 updates tracked since 2019).

About Siena Emergency Medical Services, P.c. NPPES

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

SIENA EMERGENCY MEDICAL SERVICES, P.C. (NPI 1356507099) is a healthcare organization registered as an emergency medicine in Smithtown, New York and active in the NPI registry since August 2008. The organization lists Amy Charley, Vp Legal, as its authorized official.

NPPES Registry Identity

NPI1356507099
Entity TypeOrganization
Primary Taxonomy207P00000X
Legal Business NameSIENA EMERGENCY MEDICAL SERVICES, P.C.
Location Address50 ROUTE 25ASmithtown, NY 11787-1348
Mailing Address12420 Milestone Center Dr Ste 200Germantown, MD 20876-7111 · (240) 686-2300
Phone(844) 474-4019
Fax(631) 514-7601
Organization SubpartNo
Authorized OfficialAmy CharleyVp Legal · (240) 686-2300
Enumeration DateAugust 1, 2008
Last NPPES UpdateFebruary 24, 20233 updates tracked since enumeration
NPPES CertifiedFebruary 24, 2023
✔ NPI 1356507099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
50 ROUTE 25A, Smithtown, NY 11787
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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)

Siena Emergency Medical Services, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

54

Medicare enrollment records show 54 clinicians reassign Medicare billing to Siena Emergency Medical Services, P.C., which bills Medicare for the services they deliver. Of these, 5 practice at this address and 16 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Emergency Medicine45
Nurse Practitioner4
Internal Medicine2
Medical Toxicology2
Family Practice1

Nearest to this location (20)

See all 54
Johny George
Emergency Medicine
NPI 1184208878
50 NY-25A
Smithtown, NY 11787
(631) 862-3000
✔ PECOS✔ Accepts MedicareSame address
Beth Hayes, D.O.
Emergency Medicine
NPI 1336307602
50 NY-25A
Smithtown, NY 11787
(631) 862-3000
✔ PECOSSame address
Darshak Vekaria, MD
Emergency Medicine
NPI 1194302372
50 ROUTE 25A
Smithtown, NY 11787
(631) 862-3000
✔ PECOS✔ Accepts MedicareSame address
William Flader, M.D.
Emergency Medicine
NPI 1487678991
50 ROUTE 25A
Smithtown, NY 11787
(631) 862-3110
✔ PECOS✔ Accepts MedicareSame address
Joshua Bozek, D.O.
Emergency Medicine
NPI 1063672020
50 ROUTE 25A
Smithtown, NY 11787
(631) 862-3111
✔ PECOSSame address
Sarah Arzt, DO
Emergency Medicine
NPI 1184646176
519 W JERICHO TPKE
Smithtown, NY 11787
(631) 360-5900
✔ PECOS✔ Accepts Medicare0.8 mi
Courtney Baranek, DO
Emergency Medicine
NPI 1215564604
50 NEW YORK AVE # 25A
Smithtown, NY 11787
(631) 862-3000
✔ PECOS✔ Accepts Medicare1.6 mi
David Rapoport, MD
Emergency Medicine
NPI 1184374654
50 NEW YORK AVE # 25A
Smithtown, NY 11787
(631) 862-3000
✔ PECOS✔ Accepts Medicare1.6 mi
Andrus Alian, D.O.
Emergency Medicine
NPI 1306082326
STONY BROOK UNIVERSITY HOSPITAL HSC, LEVEL 4, ROOM 080
Stony Brook, NY 11794
(631) 444-2478
✔ PECOS✔ Accepts Medicare5.4 mi
Paul Taglienti, MD
Emergency Medicine
NPI 1447410840
STONY BROOK UNIVERSITY HOSPITAL MEDICAL STAFF OFFICE
Stony Brook, NY 11794
(631) 444-2754
✔ PECOS5.4 mi
Ayse Avcioglu, M.D.
Emergency Medicine
NPI 1811126642
STONY BROOK MEDICINE DEPT OF EMERGENCY HSC, LEVEL 4, ROOM 080
Stony Brook, NY 11794
(631) 444-2478
✔ PECOS✔ Accepts Medicare5.5 mi
Robert Levy, MD
Emergency Medicine
NPI 1568561108
STONY BROOK MEDICAL CTR HSC LEVEL 4 ROOM 080
Stony Brook, NY 11794
(631) 444-2499
✔ PECOS✔ Accepts Medicare5.5 mi
Sayed Khwaja, D.O.
Emergency Medicine
NPI 1780612648
UNIVERSITY HOSPITAL, L4
Stony Brook, NY 11794
(631) 444-2499
✔ PECOS✔ Accepts Medicare6.1 mi
David Lawrence, DO
Medical Toxicology
NPI 1144273228
STONY BROOK UNIVERSITY HOSPITAL HSC, LEVEL 4, ROOM 080
Stony Brook, NY 11794
(631) 444-2478
✔ PECOS✔ Accepts Medicare6.3 mi
Alexandra Donnelly, DO
Emergency Medicine
NPI 1518543156
101 NICOLLS ROAD HSC LEVEL 4, 050
Stony Brook, NY 11794
(631) 444-3880
✔ PECOS✔ Accepts Medicare6.3 mi
I'kyori Swaby, M.D.
Emergency Medicine
NPI 1821362948
34 HIGHVIEW AVE
Huntington Station, NY 11746
(646) 479-6415
✔ PECOS✔ Accepts Medicare9.7 mi
Leonard Pastula, D.O.
Emergency Medicine
NPI 1093774978
200 BELLE TERRE RD
Port Jefferson, NY 11777
(631) 474-6000
✔ PECOS10 mi
Anthony Kwan, MD
Emergency Medicine
NPI 1003312802
200 BELLE TERRE RD
Port Jefferson, NY 11777
(631) 474-6791
✔ PECOS✔ Accepts Medicare10 mi
Lisa Sammarco, FNP
Nurse Practitioner
NPI 1518578780
75 N COUNTRY RD
Port Jefferson, NY 11777
(631) 473-1320
✔ PECOS✔ Accepts Medicare10 mi
Robert Schwaner, MD
Medical Toxicology
NPI 1902959794
270 PARK AVE
Huntington, NY 11743
(631) 351-2000
✔ PECOS✔ Accepts Medicare10 mi
See all 54 clinicians

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 Siena Emergency Medical Services, P.C.'s NPI number?

The NPI number for Siena Emergency Medical Services, P.C. is 1356507099. It was assigned to this organization in the NPPES registry on August 1, 2008.

Where is Siena Emergency Medical Services, P.C. located?

Siena Emergency Medical Services, P.C. is located at 50 Route 25A, Smithtown, NY 11787. The listed phone number is (844) 474-4019.

What is Siena Emergency Medical Services, P.C.'s specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Siena Emergency Medical Services, P.C. enrolled in Medicare?

Yes. Siena Emergency Medical Services, P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Siena Emergency Medical Services, P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 54 clinicians in 5 Medicare specialties reassign their Medicare billing to Siena Emergency Medical Services, 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. The largest specialties are Emergency Medicine (45), Nurse Practitioner (4) and Internal Medicine (2). Of these, 5 practice at this address and 16 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Siena Emergency Medical Services, P.C. was last updated on February 24, 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.