Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark L Bernstein, MD

Rheumatology Physician in Stony Brook, NY · enumerated 2006.

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

National Provider Identifier

1710909502

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Registry record

Entity type Individual (Type 1)

Name Mark L Bernstein

Credential MD

Sex Male

Practice address 2500 Route 347, Bldg 8d, Stony Brook, NY, 11790

Phone (631) 689-7780

Fax (631) 689-5669

Enumeration date Jul 24, 2006

Last updated in NPPES Jun 29, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 1419400 (NY) Secondary

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 1419400 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
CP571	Other	-	OXFORD HEALTHCARE
4288912	Other	-	AETNA
00710467	Medicaid	NY	-

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.

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Frequently asked questions

How do I verify Mark Bernstein's NPI record?

Cross-check NPI 1710909502 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1710909502 active?

Yes, as of the latest NPPES snapshot, NPI 1710909502 is active (record last updated 2010-06-29).

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Brooke Moore Nephrology Physician · Stony Brook, NY NPI 1205833704 Carmichael Angeles Nephrology Physician · Stony Brook, NY NPI 1689671190 Mark Finger Nephrology Physician · Stony Brook, NY NPI 1710984125 Suffolk Nephrology Consultants PC Nephrology Physician · Stony Brook, NY NPI 1508866492 Nicolae Caraiani Nephrology Physician · Stony Brook, NY NPI 1700887924 Trevor Wong Physical Therapist · Stony Brook, NY NPI 1184614935 Elyse Rafal Dermatology Physician · Stony Brook, NY NPI 1477515781 Ophthalmic Consultants of Long Island Ophthalmology Physician · Stony Brook, NY NPI 1245271600

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-29.