WILLIAM THOMAS RILEY M.D.
NPI 1639384118
Psychiatry & Neurology - Psychiatry in Palo Alto, CA

Q: What is William Riley's NPI number?

The NPI number for William Riley is 1639384118. It was assigned to this individual provider in the NPPES registry on May 10, 2007.

Q: What is William Riley's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for William Riley was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 10, 2007

451 CHAUCER ST, PALO ALTO, CA 94301(650) 740-2083(650) 289-9500 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About William Thomas Riley M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM THOMAS RILEY M.D. (NPI 1639384118) is an individual psychiatry provider in Palo Alto, California, licensed in California (G22128) and active in the NPI registry since May 2007.

NPPES Registry Identity

NPI1639384118

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameWILLIAM THOMAS RILEYCredential: M.D.

Location Address451 CHAUCER STPalo Alto, CA 94301-2202

Mailing Address451 Chaucer StPalo Alto, CA 94301-2202 · (650) 740-2083 · Fax (650) 289-9500

Phone(650) 740-2083

Fax(650) 289-9500

Sole ProprietorYes

Enumeration DateMay 10, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1639384118 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · G22128

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

451 CHAUCER ST, Palo Alto, CA 94301

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Riley's NPI number?

The NPI number for William Riley is 1639384118. It was assigned to this individual provider in the NPPES registry on May 10, 2007.

Where is William Riley located?

William Riley practices at 451 Chaucer St, Palo Alto, CA 94301. The listed phone number is (650) 740-2083.

What is William Riley's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

When was this NPI record last updated?

The NPPES record for William Riley was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.