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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

WILLIAM MOISAN
NPI 1053668343
Counselor - Addiction (Substance Use Disorder) in Fullerton, CA

Active since August 06, 2012
218 E COMMONWEALTH AVE, FULLERTON, CA 92832(714) 992-4770 Get Directions Write a Review

NPPES record last updated: July 26, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About William Moisan NPPES

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

WILLIAM MOISAN (NPI 1053668343) is an individual addiction (substance use disorder) provider in Fullerton, California and active in the NPI registry since August 2012.

NPPES Registry Identity

NPI1053668343
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameWILLIAM MOISAN
Location Address218 E COMMONWEALTH AVEFullerton, CA 92832-1911
Mailing Address218 E Commonwealth AveFullerton, CA 92832-1911 · (714) 992-4770
Phone(714) 992-4770
Sole ProprietorYes
Enumeration DateAugust 6, 2012
Last NPPES UpdateJuly 26, 2026
✔ NPI 1053668343 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
218 E COMMONWEALTH AVE, Fullerton, CA 92832
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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.

FELICIA FLORES
Licensed Vocational Nurse
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
KAREN LIZETTE MONTIEL
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
DAWN ESTES
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
PAMELA LARA GARCIA A049780518
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
ABIGAIL JARNIGAN LVN
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
JULIE HIGGINBOTHAM
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
CHRIS ALMENDAREZ
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770
ZSA-MEE GAE MOOR
Counselor (Addiction (Substance Use Disorder))
218 E COMMONWEALTH AVE
FULLERTON, CA 92832
Orange County (714) 992-4770

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 Moisan's NPI number?

The NPI number for William Moisan is 1053668343. It was assigned to this individual provider in the NPPES registry on August 6, 2012.

Where is William Moisan located?

William Moisan practices at 218 E Commonwealth Ave, Fullerton, CA 92832. The listed phone number is (714) 992-4770.

What is William Moisan's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for William Moisan was last updated on July 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.