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

Dr. William R Halloran, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1023149739

Dr. William R Halloran, MD is a Child & Adolescent Psychiatry Physician in Chico, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

130 Amber Grove Dr Ste 130
Chico, CA 95973-5875
Phone: (530) 895-7634
Fax: (530) 342-2440
Show map & directions

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

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence G86643 (CA)

Record details

NPI number1023149739
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 7, 2007
Last updated in NPPESJuly 31, 2008