ADVANCED INTERNAL MEDICINE GROUP PC
NPI 1669548087
Internal Medicine in Greenvale, NY

Q: What is Advanced Internal Medicine Group PC's NPI number?

The NPI number for Advanced Internal Medicine Group PC is 1669548087. It was assigned to this organization in the NPPES registry on November 28, 2006.

Q: What is Advanced Internal Medicine Group PC's specialty?

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

Active since November 28, 2006CLIA 33D0155442 · Certificate of Compliance

2200 NORTHERN BLVD, SUITE 133, GREENVALE, NY 11548(516) 352-8100(516) 352-7348 Get Directions Write a Review

NPPES record last updated: April 29, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 29, 2026, Mar 27, 2025, Aug 31, 2020 and 1 more (4 updates tracked since 2017).

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About Advanced Internal Medicine Group Pc NPPES

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

ADVANCED INTERNAL MEDICINE GROUP PC (NPI 1669548087) is a healthcare organization registered as an internal medicine in Greenvale, New York and active in the NPI registry since November 2006. The organization holds a CLIA Certificate of Compliance certificate valid through May 17, 2028 and lists Leon Schwechter, President, as its authorized official.

NPPES Registry Identity

NPI1669548087

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameADVANCED INTERNAL MEDICINE GROUP PC

Location Address2200 NORTHERN BLVD, SUITE 133Greenvale, NY 11548-1219

Mailing Address2200 Northern Blvd Ste 133Greenvale, NY 11548-1226 · (516) 352-8100 · Fax (516) 352-7348

Phone(516) 352-8100

Fax(516) 352-7348

Organization SubpartNo

Authorized OfficialLeon SchwechterPresident · (516) 352-8100

Enumeration DateNovember 28, 2006

Last NPPES UpdateApril 29, 20264 updates tracked since enumeration

NPPES CertifiedApril 29, 2026

✔ NPI 1669548087 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NY · 138681

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 ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X

2200 NORTHERN BLVD, Greenvale, NY 11548

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Other Identifiers 3

Other1225078314NY · Leon Schwecher Npi #

Other1508806712NY · Javier Morales Npi #

OtherW87631NY · Group Medicare Provider #

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

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 Compliance 33D0155442

Advanced Internal Medicine Group · E Hills, NY

Active · expires May 17, 2028

CLIA Number33D0155442

Laboratory TypePhysician Office

Certificate Effective DateMay 18, 2026

Certificate Expiration DateMay 17, 2028

Laboratory DirectorDr. Leon Schwechter

Laboratory Phone(516) 352-8100

Laboratory LocationAdvanced Internal Medicine Group2200 Northern Boulevard, Suite 133, E Hills, NY 11548

CLIA data matches this NPI record on: Name Phone

This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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.

EAST HILLS DENTISTRY, PLLC

Dentist (General Practice)

2200 NORTHERN BLVD, SUITE 107
GREENVALE, NY 11548

Nassau County (516) 621-6100

ST. FRANCIS HOSPITAL

Pharmacy (Institutional Pharmacy)

2200 NORTHERN BLVD, SUITE 100A
GREENVALE, NY 11548

Nassau County (516) 563-7710

JEFFREY FARKAS MD LLC

Radiology (Vascular & Interventional Radiology)

2200 NORTHERN BLVD, SUITE 207
EAST HILLS, NY 11548

Nassau County (516) 466-1029

CHS PHYSICIAN PARTNERS, PC

Anesthesiology (Pain Medicine)

2200 NORTHERN BLVD
GREENVALE, NY 11548

Nassau County (631) 465-6225

JOHN A VENDITTO MD PC

Internal Medicine (Interventional Cardiology)

2200 NORTHERN BLVD, SUITE 132
GREENVALE, NY 11548

Nassau County (516) 626-0700

DR. KIRAN V REDDY M.D.

Internal Medicine (Interventional Cardiology)

2200 NORTHERN BLVD, SUITE 112
GREENVALE, NY 11548

Nassau County (516) 484-6777

MRS. KERI LYNN MESSINA ANP

Nurse Practitioner (Adult Health)

2200 NORTHERN BLVD
GREENVALE, NY 11548

Nassau County (516) 562-6000

WALLACE PETER CHAN M.D.

Internal Medicine (Hematology & Oncology)

2200 NORTHERN BLVD, SUITE 111
GREENVALE, NY 11548

Nassau County (516) 325-7500

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 Advanced Internal Medicine Group PC's NPI number?

The NPI number for Advanced Internal Medicine Group PC is 1669548087. It was assigned to this organization in the NPPES registry on November 28, 2006.

Where is Advanced Internal Medicine Group PC located?

Advanced Internal Medicine Group PC is located at 2200 Northern Blvd Suite 133, Greenvale, NY 11548. The listed phone number is (516) 352-8100.

What is Advanced Internal Medicine Group PC's specialty?

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

Does Advanced Internal Medicine Group PC hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 33D0155442) is associated with this NPI, valid through May 17, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Advanced Internal Medicine Group PC was last updated on April 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.