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Stephen J Marks, MD

Internal Medicine Physician in New York, NY · enumerated 2007 · practices at Robert P. Reichstein, MD, PC.

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

National Provider Identifier

1740301100

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Registry record

Entity type Individual (Type 1)
Name Stephen J Marks
Credential MD
Sex Male
Practice address 1185 Park Avenue, #1c 1d, New York, NY, 10128
Phone (212) 722-6613
Fax (212) 722-6835
Enumeration date Apr 3, 2007
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD124146 (NY) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Stephen Marks's NPI record?
Cross-check NPI 1740301100 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1740301100 active?
Yes, as of the latest NPPES snapshot, NPI 1740301100 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.