Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Barney Rubenstein, MD

Internal Medicine Physician in Greenwich, NY · enumerated 2005.

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

National Provider Identifier

1356339469

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Registry record

Entity type Individual (Type 1)

Name Barney Rubenstein

Credential MD

Sex Male

Practice address 1134 State Route 29, Greenwich Medical Center, Greenwich, NY, 12834

Phone (518) 692-9861

Fax (518) 692-7947

Enumeration date Oct 12, 2005

Last updated in NPPES Jun 8, 2021

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 162668 (NY) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 162668 (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
P00010324	Other	NY	RR MEDICARE
01083930	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1356339469 active?

Yes, as of the latest NPPES snapshot, NPI 1356339469 is active (record last updated 2021-06-08).

How do I verify Barney Rubenstein's NPI record?

Cross-check NPI 1356339469 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-08.