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Michael Felsen, MD

Internal Medicine Physician in New York, NY · enumerated 2005.

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

National Provider Identifier

1891784286

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Registry record

Entity type Individual (Type 1)
Name Michael Felsen
Credential MD
Sex Male
Practice address 10 Union Sq E, Suite 3g, New York, NY, 10003
Phone (212) 844-8100
Fax (212) 844-8152
Enumeration date Oct 18, 2005
Last updated in NPPES Apr 17, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 1939381 (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
01725424 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 Michael Felsen's NPI record?
Cross-check NPI 1891784286 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891784286 active?
Yes, as of the latest NPPES snapshot, NPI 1891784286 is active (record last updated 2019-04-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-17.