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NORTH SHORE MEDICAL GROUP OF THE MOUNT SINAI SCHOOL OF MEDICINE
NPI 1275640609
Internal Medicine in Greenlawn, NY

Active since August 23, 2006CLIA 33D2160731 · Waiver
5 CUBA HILL RD, GREENLAWN, NY 11740(631) 628-5000(631) 351-8247 Get Directions Write a Review

NPPES record last updated: May 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 14, 2026, May 25, 2022, Jun 25, 2020 (3 updates tracked since 2020).

About North Shore Medical Group Of The Mount Sinai School Of Medicine NPPES

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

NORTH SHORE MEDICAL GROUP OF THE MOUNT SINAI SCHOOL OF MEDICINE (NPI 1275640609), doing business as Mount Sinai Doctors Long Island, is a healthcare organization registered as an internal medicine in Greenlawn, New York and active in the NPI registry since August 2006. The organization holds a CLIA Waiver certificate valid through March 26, 2027, maintains 18 additional practice locations, and lists Janet Street, Vp Operations, as its authorized official.

NPPES Registry Identity

NPI1275640609
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameNORTH SHORE MEDICAL GROUP OF THE MOUNT SINAI SCHOOL OF MEDICINE
Location Address5 CUBA HILL RDGreenlawn, NY 11740-1624
Mailing Address5 Cuba Hill RdGreenlawn, NY 11740-1624 · (631) 628-5000 · Fax (631) 351-8247
Phone(631) 628-5000
Fax(631) 351-8247
Organization SubpartNo
Authorized OfficialJanet StreetVp Operations · (646) 354-3680
Enumeration DateAugust 23, 2006
Last NPPES UpdateMay 14, 20263 updates tracked since enumeration
NPPES CertifiedMay 14, 2026
✔ NPI 1275640609 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 15

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedAllergy & ImmunologyTaxonomy 207K00000X
Also ListedFamily MedicineTaxonomy 207Q00000X
Also ListedFamily Medicine · Adolescent MedicineTaxonomy 207QA0000X
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X
Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X
Also ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X
Also ListedInternal Medicine · NephrologyTaxonomy 207RN0300X
Also ListedOphthalmologyTaxonomy 207W00000X
Also ListedOrthopaedic SurgeryTaxonomy 207X00000X
Also ListedOtolaryngology · Facial Plastic SurgeryTaxonomy 207YS0123X
Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X
Also ListedSurgery · Vascular SurgeryTaxonomy 2086S0129X
Also ListedClinical Medical LaboratoryTaxonomy 291U00000X
5 CUBA HILL RD, Greenlawn, NY 11740
Open in Google Maps ↗

Other Names 2

Doing Business AsMount Sinai Doctors Long Island
Doing Business AsNorth Shore Medical Group

Secondary Practice Locations 18

Location 12510 30th AveLong Island City, NY 11102-2448 · Phone (718) 932-1000
Location 22020 Wantagh AveWantagh, NY 11793-3931 · Phone (516) 961-4545
Location 31086 N BroadwayYonkers, NY 10701-1112 · Phone (914) 968-3535
Location 41 Healthy WayOceanside, NY 11572-1551 · Phone (516) 632-3000
Location 51 Gustave L Levy PlNew York, NY 10029-6504 · Phone (212) 241-6500
Location 61441 South AveStaten Island, NY 10314-3779 · Phone (332) 243-6900
Location 71977 Flatbush AveBrooklyn, NY 11234-2811 · Phone (718) 758-7070
Location 83131 Kings Hwy Ste 3-03Brooklyn, NY 11234-2644 · Phone (718) 758-7022
Location 91100 Franklin Ave Ste 203Garden City, NY 11530-1601 · Phone (516) 248-2422
Location 102520 30th AveAstoria, NY 11102-2448 · Phone (718) 808-7777
Location 113722 82nd StJackson Heights, NY 11372-7040 · Phone (718) 879-1600
Location 123712 82nd StJackson Heights, NY 11372-7032 · Phone (718) 879-1600
Location 133014 Crescent StAstoria, NY 11102-3249 · Phone (718) 808-7777
Location 14341 Central Park AveScarsdale, NY 10583-1301 · Phone (914) 370-5000
Location 151436 BroadwayHewlett, NY 11557-1405 · Phone (516) 563-7200
Location 16510 Broadhollow RdMelville, NY 11747-3671 · Phone (516) 248-2422
Location 179901 Queens BlvdRego Park, NY 11374-4512 · Phone (718) 520-6100
Location 181155 Northern BlvdManhasset, NY 11030-3040 · Phone (516) 407-4000

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)

North Shore Medical Group Of The Mount Sinai School Of Medicine is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

571

Medicare enrollment records show 571 clinicians reassign Medicare billing to North Shore Medical Group Of The Mount Sinai School Of Medicine, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 81 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 43

Diagnostic Radiology143
Internal Medicine71
Cardiovascular Disease (Cardiology)38
Family Practice34
Nurse Practitioner32
Obstetrics/Gynecology30
Gastroenterology27
General Surgery19
35 other specialties177

Nearest to this location (20)

See all 571
Stella Chin, MD
Neurology
NPI 1578141784
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 444-2599
✔ PECOSSame address
Mark Goldman, MD
Cardiovascular Disease (Cardiology)
NPI 1053512285
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts MedicareSame address
Trevor Prashad, DO
Family Practice
NPI 1740740513
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts MedicareSame address
Semyon Gurgov, M.D.
Urology
NPI 1023364643
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Mutiat Akinsemoyin, M.D
Pediatric Medicine
NPI 1255783387
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 659-4000
✔ PECOS✔ Accepts Medicare0.4 mi
Eric Arguelles, MD
Cardiovascular Disease (Cardiology)
NPI 1104138627
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Neha Arora, D.O.
Endocrinology
NPI 1275953572
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Eric Ballecer
Gastroenterology
NPI 1760833602
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Mathew Birnbaum, MD
Dermatology
NPI 1306334388
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Tyler Cappello, MD
Internal Medicine
NPI 1538746896
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Cecilia Cassidy, APRN, CDE
Nurse Practitioner
NPI 1124410634
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS0.4 mi
Maria Davila, M.D.
Endocrinology
NPI 1659643104
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Ning Ding, MD, SCM
Internal Medicine
NPI 1700462587
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Lisa Fleece, CNM
Certified Nurse Midwife (CNM)
NPI 1649757642
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Katharine Frost, MD
Obstetrics/Gynecology
NPI 1548898869
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Sunil George, M.D.
Nephrology
NPI 1194929364
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Tianyuan Liu, M.D.
Diagnostic Radiology
NPI 1669904322
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Alyssa Rehm
Neurology
NPI 1265875041
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Marvi Rizwan, MD
Allergy/Immunology
NPI 1821527995
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
Vaish Sekar, M.D.
Hospitalist
NPI 1285028571
5 CUBA HILL RD
Greenlawn, NY 11740
(631) 628-5000
✔ PECOS✔ Accepts Medicare0.4 mi
See all 571 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D2160731

North Shore Medical Group · Manhasset, NY
Active · expires Mar 26, 2027
CLIA Number33D2160731
Laboratory TypePhysician Office
Certificate Effective DateJanuary 17, 2019
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorDr. Stephen Tranchina
Laboratory Phone(516) 407-4000
Laboratory LocationNorth Shore Medical Group1155 Northern Blvd, Manhasset, NY 11030
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 North Shore Medical Group Of The Mount Sinai School Of Medicine's NPI number?

The NPI number for North Shore Medical Group Of The Mount Sinai School Of Medicine is 1275640609. It was assigned to this organization in the NPPES registry on August 23, 2006. The provider is doing business as Mount Sinai Doctors Long Island and North Shore Medical Group.

Where is North Shore Medical Group Of The Mount Sinai School Of Medicine located?

North Shore Medical Group Of The Mount Sinai School Of Medicine is located at 5 Cuba Hill Rd, Greenlawn, NY 11740. The listed phone number is (631) 628-5000.

What is North Shore Medical Group Of The Mount Sinai School Of Medicine's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is North Shore Medical Group Of The Mount Sinai School Of Medicine enrolled in Medicare?

Yes. North Shore Medical Group Of The Mount Sinai School Of Medicine is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through North Shore Medical Group Of The Mount Sinai School Of Medicine?

According to the CMS Revalidation Reassignment List (October 2026 release), 571 clinicians in 43 Medicare specialties reassign their Medicare billing to North Shore Medical Group Of The Mount Sinai School Of Medicine. 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 Diagnostic Radiology (143), Internal Medicine (71) and Cardiovascular Disease (Cardiology) (38). Of these, 3 practice at this address and 81 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does North Shore Medical Group Of The Mount Sinai School Of Medicine hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D2160731) is associated with this NPI, valid through March 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for North Shore Medical Group Of The Mount Sinai School Of Medicine was last updated on May 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.