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Dr. Nicholas Duff Hazen, M.D.

Obstetrics & Gynecology Physician in Washington, DC · enumerated 2014.

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

National Provider Identifier

1205254174

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Registry record

Entity type Individual (Type 1)
Name Dr. Nicholas Duff Hazen
Credential M.D.
Sex Male
Practice address 3800 Reservoir Rd Nw # 3phc, Washington, DC, 20007
Phone (202) 444-8531
Fax (877) 544-7752
Enumeration date Mar 28, 2014
Last updated in NPPES Aug 10, 2020

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License D85528 (MD) Secondary
207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 0101269802 (VA) Secondary
207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License MD046205 (DC) 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

What is the NPI number for Nicholas Hazen?
The National Provider Identifier (NPI) for Nicholas Hazen is 1205254174, a Type 1 (individual) record in the CMS NPPES registry.
Where does Nicholas Hazen practice?
The practice location on file with NPPES is in Washington, DC. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-10.