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Robert Mark Eisdorfer, MD

Gastroenterology Physician in Rockville, MD · enumerated 2005.

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

National Provider Identifier

1891789046

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Registry record

Entity type Individual (Type 1)
Name Robert Mark Eisdorfer
Credential MD
Sex Male
Practice address 14955 Shady Grove Rd, Suite 150, Rockville, MD, 20850
Phone (301) 340-3252
Fax (301) 340-1423
Enumeration date Sep 2, 2005
Last updated in NPPES Mar 4, 2013

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License D0041731 (MD) 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
597761400 Medicaid MD -
100005281 Other MD RAILROAD MEDICARE

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 Robert Eisdorfer's NPI record?
Cross-check NPI 1891789046 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891789046 active?
Yes, as of the latest NPPES snapshot, NPI 1891789046 is active (record last updated 2013-03-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-04.