Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis Lindsey Hayden, D.O.

Anatomic Pathology & Clinical Pathology Physician in Washington, DC · enumerated 2005.

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

National Provider Identifier

1740264654

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis Lindsey Hayden

Credential D.O.

Sex Male

Practice address 6825 16th St Nw, Washington, DC, 20306

Phone (202) 782-1783

Fax (202) 782-5017

Enumeration date Dec 5, 2005

Last updated in NPPES Mar 14, 2008

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License DO-236 (AL) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Dennis Hayden?

The National Provider Identifier (NPI) for Dennis Hayden is 1740264654, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dennis Hayden practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-14.