Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Prof. Mary Ellen Warren, PHD

Q: What is the NPI number for Mary Warren?

The National Provider Identifier (NPI) for Mary Warren is 1902904477, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in Roanoke, VA · enumerated 2006.

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

National Provider Identifier

1902904477

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Registry record

Entity type Individual (Type 1)

Name Prof. Mary Ellen Warren

Credential PHD

Sex Female

Practice address 4348 Electric Rd, Roanoke, VA, 24018

Phone (540) 769-0976

Fax (540) 857-5385

Enumeration date Sep 20, 2006

Last updated in NPPES Apr 11, 2024

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 633 (SC) Secondary

103TF0000X Family Psychologist Behavioral Health & Social Service Providers · License 633 (SC) Secondary

103TS0200X School Psychologist Behavioral Health & Social Service Providers · License 633 (SC) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810008462 (VA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
PS0409	Medicaid	SC	-

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

Where does Mary Warren practice?

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

What is the NPI number for Mary Warren?

The National Provider Identifier (NPI) for Mary Warren is 1902904477, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-11.