Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DONALD THOMAS HAY M.D.
NPI 1740288836
Urology in Concord, CA

Q: What is Donald Hay's NPI number?

The NPI number for Donald Hay is 1740288836. It was assigned to this individual provider in the NPPES registry on July 12, 2005.

Q: What is Donald Hay's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Q: When was this NPI record last updated?

The NPPES record for Donald Hay was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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 July 12, 2005

2222 EAST ST, STE 250, CONCORD, CA 94520(925) 689-6211(925) 689-3857 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Donald Thomas Hay M.d. NPPES

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

DONALD THOMAS HAY M.D. (NPI 1740288836) is an individual urology provider in Concord, California, licensed in California (A18121) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1740288836

Entity TypeIndividualMale

Primary Taxonomy208800000X

Provider Legal NameDONALD THOMAS HAYCredential: M.D.

Location Address2222 EAST ST, STE 250Concord, CA 94520-2084

Mailing Address2222 East St, Ste 250Concord, CA 94520-2084 · (925) 689-6211 · Fax (925) 689-3857

Phone(925) 689-6211

Fax(925) 689-3857

Sole ProprietorNo

Enumeration DateJuly 12, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1740288836 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians

Taxonomy Code208800000X

License✔ Licensed in CA · A18121

Definition

A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

2222 EAST ST, Concord, CA 94520

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Other Identifiers 1

MedicaidGR0067920CA

Other Providers at the Same Location NPPES 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ERIC R MARIOTTI MD

Surgery (Plastic and Reconstructive Surgery)

2222 EAST ST, #310
CONCORD, CA 94520

Contra Costa County (925) 685-4533

JEREMY ISAAC LIEB M.D.

Urology

2222 EAST ST, STE 250
CONCORD, CA 94520

Contra Costa County (925) 689-6211

CONTRA COSTA EYE MEDICAL CENTER INC

Ophthalmology

2222 EAST ST, STE 365
CONCORD, CA 94520

Contra Costa County (925) 687-8280

DR. KAREN THERESE GRAHAM MD

Ophthalmology

2222 EAST ST, STE 365
CONCORD, CA 94520

Contra Costa County (925) 687-8280

DIABLO DIALYSIS ACCESS CENTER A CA PROFESSIONAL MEDICAL CORP

Specialist

2222 EAST ST, STE 305
CONCORD, CA 94520

Contra Costa County (925) 686-1230

WILSON T LEE MD

Anesthesiology

2222 EAST ST
CONCORD, CA 94520

Contra Costa County (925) 691-5000

STEPHEN PAUL TAYLOR MD

Urology

2222 EAST ST, STE 250
CONCORD, CA 94520

Contra Costa County (925) 689-6211

DR. AARON SCOTT COHEN D.D.S.

Dentist (Endodontics)

2222 EAST ST, 350
CONCORD, CA 94520

Contra Costa County (925) 676-3000

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 Donald Hay's NPI number?

The NPI number for Donald Hay is 1740288836. It was assigned to this individual provider in the NPPES registry on July 12, 2005.

Where is Donald Hay located?

Donald Hay practices at 2222 East St Ste 250, Concord, CA 94520. The listed phone number is (925) 689-6211.

What is Donald Hay's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

When was this NPI record last updated?

The NPPES record for Donald Hay was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.