Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. William Patrick Callahan

Individual provider Mental Health Counselor · NPI 1194292318

Mr. William Patrick Callahan is a Mental Health Counselor in Orange, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2018

Practice location Address checks out

1855 W Katella Ave Ste 150
Orange, CA 92867-3432
Phone: (714) 399-3480
Fax: (714) 399-3481
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X (CA)

Record details

NPI number1194292318
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedOctober 25, 2018
Last updated in NPPESFebruary 3, 2022
Certification dateFebruary 3, 2022
Mailing address1646 Cabrillo Ave # 203, Torrance, CA 90501-2819

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