IndividualActive
William Callahan
NPI 1194292318 · Mental Health Counselor · Orange, CA
William Callahan is a Mental Health Counselor provider in Orange, CA (NPI 1194292318).
Provider details
- NPI number
- 1194292318
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(61/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1855 W Katella Ave Ste 150
Orange, CA 92867-3432
Phone: (714) 399-3480
Fax: (714) 399-3481
Street-level locationGet directions
Mailing address
1646 Cabrillo Ave # 203
Torrance, CA 90501-2819
Registry dates
- Enumerated
- 2018-10-25
- Last updated
- 2022-02-03
- Certified
- 2022-02-03
Frequently asked questions
- What is William Callahan's NPI number?
- William Callahan's National Provider Identifier (NPI) is 1194292318, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Callahan's specialty?
- William Callahan is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Callahan located?
- William Callahan's practice location on file with NPPES is 1855 W Katella Ave Ste 150, Orange, CA 92867-3432.
- What is William Callahan's phone number?
- The practice phone number listed in the NPPES registry for William Callahan is (714) 399-3480.
- Is William Callahan's NPI active?
- Yes — William Callahan's NPI (1194292318) is active in the NPPES registry as of the last update on 2022-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.