Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

George Nader Bishay Marcos

Pharmacist in Washington, DC · enumerated 2020.

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

National Provider Identifier

1477156909

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Registry record

Entity type Individual (Type 1)

Name George Nader Bishay Marcos

Sex Male

Practice address 320 40th St Ne, Washington, DC, 20019

Phone (202) 396-2331

Enumeration date Nov 18, 2020

Last updated in NPPES Nov 18, 2020

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License PH100002817 (DC) Primary

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

Where does George Marcos practice?

The practice location on file with NPPES is in Washington, DC. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for George Marcos?

The National Provider Identifier (NPI) for George Marcos is 1477156909, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-18.