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

DR. ARLENE IGNACIO COTAS D.M.D.
NPI 1770521767
Dentist - General Practice in Hayward, CA

Q: What is Arlene Cotas's NPI number?

The NPI number for Arlene Cotas is 1770521767. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Q: What is Arlene Cotas's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for Arlene Cotas 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 41 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 June 03, 2006

786 B ST, HAYWARD, CA 94541(510) 733-6825(510) 733-6835 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Arlene Ignacio Cotas D.m.d. NPPES

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

DR. ARLENE IGNACIO COTAS D.M.D. (NPI 1770521767) is an individual general practice provider in Hayward, California, licensed in California (47062) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1770521767

Entity TypeIndividualFemale

Primary Taxonomy1223G0001X

Provider Legal NameDR. ARLENE IGNACIO COTASCredential: D.M.D.

Location Address786 B STHayward, CA 94541-5008

Mailing Address786 B StHayward, CA 94541-5008 · (510) 733-6825 · Fax (510) 733-6835

Phone(510) 733-6825

Fax(510) 733-6835

Sole ProprietorNo

Enumeration DateJune 3, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1770521767 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in CA · 47062

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

786 B ST, Hayward, CA 94541

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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 Arlene Cotas's NPI number?

The NPI number for Arlene Cotas is 1770521767. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Where is Arlene Cotas located?

Arlene Cotas practices at 786 B St, Hayward, CA 94541. The listed phone number is (510) 733-6825.

What is Arlene Cotas's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

When was this NPI record last updated?

The NPPES record for Arlene Cotas 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 41 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.