William Ayala, BA
Addiction (Substance Use Disorder) Counselor · Pasadena, CA
William Ayala, BA is an addiction (substance use disorder) counselor with a practice address in Pasadena, California, and NPI 1538327325, issued on May 28, 2008. Check the license with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Ayala
- Credential
- BA
- Primary taxonomy
- Addiction (Substance Use Disorder) Counselor 101YA0400X
- Practice location
- 1450 N Lake Ave # 150, Pasadena, CA 91104
- Phone
- (626) 794-1161
- Enumerated
- May 28, 2008
- Record last updated
- Jan 2, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (626) 794-6071
- Entity
- Type 1 · individual
8 nearest addiction (substance use disorder) counselor records → All 27,741 in California → Look up another NPI →
Also registered at 1450 N Lake Ave # 150
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rudy MarmolejoAddiction (Substance Use Disorder) Counselor1295208908
Verify William Ayala in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Ayala among 27,741 addiction (substance use disorder) counselor records in California
William Ayala, BA is one of 27,741 addiction (substance use disorder) counselor records with a practice address in California. under 1% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2008, is newer than 12% of them.
- NPI issued2008 · 12% of these records are older, 84% newer
- In a Medicare fileNo · under 1% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2018 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YA0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
401 addiction (substance use disorder) counselor records list a practice address in Pasadena
They are 401 of the 10,525 NPPES records with a practice address in Pasadena, and 27,741 addiction (substance use disorder) counselor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 27,741 in California → Every provider in Pasadena → Addiction (Substance Use Disorder) Counselor nationwide →
The 8 addiction (substance use disorder) counselor records with the nearest ZIP codes
- Liliyan Avansian AdeganiPasadena, CA 911041508265125
- Vanessa KanistanauxPasadena, CA 911041770766594
- Marnetta KimbellPasadena, CA 911041972789295
- Shannon KnightPasadena, CA 911041831593219
- Omar LizarragaPasadena, CA 911041316325459
- Michelle Mandap, LVNPasadena, CA 911041912048059
- Rodolfo MartinezPasadena, CA 911041598142796
- Jonathan MonsonPasadena, CA 911041689006074
Common questions
What is William Ayala, BA's NPI number?
William Ayala, BA's National Provider Identifier (NPI) is 1538327325, issued on May 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William Ayala, BA located?
The NPPES record lists a practice address at 1450 N Lake Ave # 150, Pasadena, CA, 91104. Phone: (626) 794-1161. Providers update this record themselves, so call before visiting.
How can I verify William Ayala, BA's license?
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.