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MR. WILLIAM PATRICK CALLAHAN
NPI 1194292318
Counselor - Mental Health in Orange, CA

Active since October 25, 2018
1855 W KATELLA AVE STE 150, ORANGE, CA 92867(714) 399-3480(714) 399-3481 Get Directions Write a Review

NPPES record last updated: February 3, 2022. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Feb 3, 2022, Jan 24, 2022, Nov 12, 2021 and 5 more (8 updates tracked since 2018).

About Mr. William Patrick Callahan NPPES

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

MR. WILLIAM PATRICK CALLAHAN (NPI 1194292318) is an individual mental health provider in Orange, California and active in the NPI registry since October 2018.

NPPES Registry Identity

NPI1194292318
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameMR. WILLIAM PATRICK CALLAHAN
Location Address1855 W KATELLA AVE STE 150Orange, CA 92867-3432
Mailing Address1646 Cabrillo Ave # 203Torrance, CA 90501-2819 · (310) 227-4885
Phone(714) 399-3480
Fax(714) 399-3481
Sole ProprietorYes
Enumeration DateOctober 25, 2018
Last NPPES UpdateFebruary 3, 20228 updates tracked since enumeration
NPPES CertifiedFebruary 3, 2022
✔ NPI 1194292318 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
1855 W KATELLA AVE STE 150, Orange, CA 92867
Open in Google Maps ↗

Other Identifiers 1

Other913744300FCA · Medi-cal

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.

MARIA DEL CARMEN BERNAL
Marriage & Family Therapist
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
GIANNY ALEXANDRA RUSSO SANTIAGO
Case Manager/Care Coordinator
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
TYLER JAMES ALLEN
Case Manager/Care Coordinator
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
ANTHONY CARMONA
Day Training/Habilitation Specialist
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
MELINDA JANE BERGE ECHEVERRIA LCSW
Social Worker (Clinical)
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
CHARLENE MA
Social Worker
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
JESSICA SHARP PMHNP
Nurse Practitioner
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480
IVONNE GUADALUPE MARTINEZ
Counselor (Mental Health)
1855 W KATELLA AVE STE 150
ORANGE, CA 92867
Orange County (714) 399-3480

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 Callahan's NPI number?

The NPI number for William Callahan is 1194292318. It was assigned to this individual provider in the NPPES registry on October 25, 2018.

Where is William Callahan located?

William Callahan practices at 1855 W Katella Ave Ste 150, Orange, CA 92867. The listed phone number is (714) 399-3480.

What is William Callahan's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for William Callahan was last updated on February 3, 2022. NPI Profile syncs with the weekly NPPES data releases published by CMS.