William Chau
Mental Health Counselor · Los Angeles, CA
William Chau is a mental health counselor with a practice address in Los Angeles, California, and NPI 1093169450, issued on Apr 21, 2016. Check the license (California 81458, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Chau
- Primary taxonomy
- Mental Health Counselor 101YM0800X
- License number
- 81458 CA
Self-reported in NPPES; status is on the state search - Practice location
- 515 Columbia Ave Ste 100, Los Angeles, CA 90017
- Phone
- (213) 553-1884
- Enumerated
- Apr 21, 2016
- Record last updated
- Nov 7, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (213) 236-9662
- Entity
- Type 1 · individual
Also registered at 515 Columbia Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles AndersonStudent in an Organized Health Care Education/Training Program1932079381
- Brianna ArandaCase Manager/Care Coordinator1871364331
- Samantha ArandaCase Manager/Care Coordinator1811695265
- Seohyun ChoiStudent in an Organized Health Care Education/Training Program1902769300
- Stephanie HinojosaStudent in an Organized Health Care Education/Training Program1275350811
- Judith IbarraStudent in an Organized Health Care Education/Training Program1417663360
Verify William Chau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 81458Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1,643 mental health counselor records list a practice address in Los Angeles
They are 1,643 of the 69,537 NPPES records with a practice address in Los Angeles, and 28,617 mental health counselor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,643 in Los Angeles → All 28,617 in California → Every provider in Los Angeles →
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Common questions
What is William Chau's NPI number?
William Chau's National Provider Identifier (NPI) is 1093169450, issued on Apr 21, 2016. An NPI identifies a provider in billing; it is not a license.
Where is William Chau located?
The NPPES record lists a practice address at 515 Columbia Ave Ste 100, Los Angeles, CA, 90017. Phone: (213) 553-1884. Providers update this record themselves, so call before visiting.
How can I verify William Chau's license?
NPPES lists California license number 81458, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.