William B. Holliday, MD
Psychiatry Physician · Torrance, CA
William B. Holliday, MD is a psychiatry physician with a practice address in Torrance, California, and NPI 1912402496, issued on Mar 27, 2018. Check the license (California A164022, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William B. Holliday
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A164022 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 W Carson St, Torrance, CA 90502
- Phone
- (206) 419-2023
- Enumerated
- Mar 27, 2018
- Record last updated
- Aug 23, 2022
- Medicare enrollment
- Enrolled (PECOS I20220825004101); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1000 W Carson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arjan AbarStudent in an Organized Health Care Education/Training Program1982309290
- Brenda Abarca, MDPsychiatry Physician1407485527
- Maleeha AbbasStudent in an Organized Health Care Education/Training Program1275203499
- Saamirah Abdul-MuminCommunity Health Worker1144683947
- Maria Elena AbedesAmbulatory Care Registered Nurse1184360992
- Hoda Abou-Ziab, PSYDClinical Psychologist1649618125
Verify William B. Holliday in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A164022Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average psychiatry physician in 2024
951 Medicare Part D claims for 134 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Trazodone Hcl92 claims
- Clonazepam84 claims
- Sertraline Hcl50 claims
- Fluoxetine Hcl45 claims
- Lorazepam41 claims
- Bupropion Xl39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLomita, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William B. Holliday among 8,673 psychiatry physician records in California
William B. Holliday, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2018 · median 2005 among the 3,295 with a school on file
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
150 psychiatry physician records list a practice address in Torrance
They are 150 of the 8,901 NPPES records with a practice address in Torrance, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Torrance → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Karl Burgoyne, M.D.Torrance, CA 905021518028943
- Andrea Caldwell, M.D.Torrance, CA 905021205907037
- Samson Cho, M.D.Torrance, CA 905021659448645
- Deborah Flores, M.D.Torrance, CA 905021306819586
- Benjamin Furst, MDTorrance, CA 905021033214010
- Charles Grob, M.D.Torrance, CA 905021396710307
- Andrew Ho, M.D.Torrance, CA 905021962465096
- Ira Lesser, M.D.Torrance, CA 905021477500460
Common questions
What is William B. Holliday, MD's NPI number?
William B. Holliday, MD's National Provider Identifier (NPI) is 1912402496, issued on Mar 27, 2018. An NPI identifies a provider in billing; it is not a license.
Where is William B. Holliday, MD located?
The NPPES record lists a practice address at 1000 W Carson St, Torrance, CA, 90502. Phone: (206) 419-2023. Providers update this record themselves, so call before visiting.
How can I verify William B. Holliday, MD's license?
NPPES lists California license number A164022, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William B. Holliday, MD prescribe under Medicare Part D?
In 2024, William B. Holliday, MD had 951 Medicare Part D claims for 134 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.