Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mount Sinai North Shore Medical Group

Internal Medicine Physician in Nesconset, NY · enumerated 2011 · authorized official Janet Street, Practice Administrator.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1659677037

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Registry record

Entity type Organization (Type 2)

Legal business name Mount Sinai North Shore Medical Group

Other name <Unavail>

Practice address 59 Southern Blvd, Nesconset, NY, 11767

Phone (631) 659-1700

Fax (631) 659-1750

Enumeration date Feb 2, 2011

Last updated in NPPES Feb 2, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians Secondary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Janet Street

Title Practice Administrator

Phone (631) 351-3703

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Mount Sinai North Shore Medical Group?

Mount Sinai North Shore Medical Group is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-02.