William Halloran, M.D.
NPI 1023149739 · Child & Adolescent Psychiatry Physician · Chico, CA
William Halloran, M.D. is a Child & Adolescent Psychiatry Physician provider in Chico, CA (NPI 1023149739).
Provider details
- NPI number
- 1023149739
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G86643 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
Mailing address
Registry dates
- Enumerated
- 2007-03-07
- Last updated
- 2008-07-31
Frequently asked questions
- What is William Halloran's NPI number?
- William Halloran's National Provider Identifier (NPI) is 1023149739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Halloran's specialty?
- William Halloran is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Halloran located?
- William Halloran's practice location on file with NPPES is 130 Amber Grove Dr, Chico, CA 95973-5875.
- What is William Halloran's phone number?
- The practice phone number listed in the NPPES registry for William Halloran is (530) 895-7634.
- Is William Halloran's NPI active?
- Yes — William Halloran's NPI (1023149739) is active in the NPPES registry as of the last update on 2008-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.