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

WILLIAM S. ARNETT DDS
NPI 1265405112
Dentist - General Practice in Yountville, CA

Active since February 10, 2006
220 CALIFORNIA DR, YOUNTVILLE, CA 94599(707) 944-4772(707) 948-2530 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William S. Arnett Dds NPPES

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

WILLIAM S. ARNETT DDS (NPI 1265405112) is an individual general practice provider in Yountville, California, licensed in California (21687) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1265405112
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameWILLIAM S. ARNETTCredential: DDS
Location Address220 CALIFORNIA DRYountville, CA 94599-1412
Mailing Address220 California DriveYountville, CA 94599 · (707) 944-4772 · Fax (707) 948-2530
Phone(707) 944-4772
Fax(707) 948-2530
Sole ProprietorNo
Enumeration DateFebruary 10, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1265405112 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 · 21687
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.
220 CALIFORNIA DR, Yountville, CA 94599
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Other Providers at the Same Location NPPES 20

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

JOHN B BUDINGER D.O.
Psychiatry & Neurology (Psychiatry)
220 CALIFORNIA DR, C/O MEDICAL STAFF OFFICE
YOUNTVILLE, CA 94599
Napa County (707) 944-4716
DR. ROBERT P ALBANESE JR. MD
Psychiatry & Neurology (Psychiatry)
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4660
BARBARA G. REISMAN M.D.
Psychiatry & Neurology (Psychiatry)
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4772
RICHARD M MALAN M.D.
Dentist
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4716
CLYDE A. COOPER M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
220 CALIFORNIA DR, C/O MEDICAL STAFF OFFICE
YOUNTVILLE, CA 94599
Napa County (707) 944-4772
COURTNEY P. PERSINGER PSY.D.
Psychologist (Clinical)
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4771
SARAH SPANN MILLER PH.D.
Psychologist
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4716
DR. PAUL B. CHIN M.D.
Internal Medicine
220 CALIFORNIA DR
YOUNTVILLE, CA 94599
Napa County (707) 944-4716

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 Arnett's NPI number?

The NPI number for William Arnett is 1265405112. It was assigned to this individual provider in the NPPES registry on February 10, 2006.

Where is William Arnett located?

William Arnett practices at 220 California Dr, Yountville, CA 94599. The listed phone number is (707) 944-4772.

What is William Arnett'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 William Arnett 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 28 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.