NPPES file of Aug 9, 2026

Alison Catherine Dirienzo

Addiction (Substance Use Disorder) Counselor · Mission Viejo, CA

Alison Catherine Dirienzo is an addiction (substance use disorder) counselor with a practice address in Mission Viejo, California, and NPI 1497300560, issued on Aug 6, 2019. Check the license with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1497300560
Name
Alison Catherine Dirienzo
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
Practice location
27281 Las Ramblas Ste 140, Mission Viejo, CA 92691
Phone
(949) 540-0170
Enumerated
Aug 6, 2019
Record last updated
Aug 12, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(949) 540-0173
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest addiction (substance use disorder) counselor records → All 27,741 in California → Look up another NPI →

Also registered at 27281 Las Ramblas Ste 140

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brett BerryAddiction (Substance Use Disorder) Counselor1538723515
  2. Zachary BoikeAddiction (Substance Use Disorder) Counselor1144794389
  3. Rita ChastainAddiction (Substance Use Disorder) Counselor1528666542
  4. Michael CoyneAddiction (Substance Use Disorder) Counselor1780219048
  5. Maarten DijkstraAddiction (Substance Use Disorder) Counselor1235774498
  6. Elise Graves, MA RADT1Addiction (Substance Use Disorder) Counselor1629511704

Verify Alison Catherine Dirienzo in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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Alison Catherine Dirienzo among 27,741 addiction (substance use disorder) counselor records in California

Alison Catherine Dirienzo 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 2019, is newer than 52% of them.

  • NPI issued2019 · 52% of these records are older, 41% 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 updated2020 · 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).

27 addiction (substance use disorder) counselor records list a practice address in Mission Viejo

They are 27 of the 2,156 NPPES records with a practice address in Mission Viejo, 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 Mission Viejo → Addiction (Substance Use Disorder) Counselor nationwide →

The 8 addiction (substance use disorder) counselor records with the nearest ZIP codes

  1. Jeffrey Benon, CATC 102373Mission Viejo, CA 926911669777819
  2. Brett BerryMission Viejo, CA 926911538723515
  3. Zachary BoikeMission Viejo, CA 926911144794389
  4. Jon ClementsMission Viejo, CA 926911912478850
  5. Heather GarciaMission Viejo, CA 926911124236955
  6. Elise Graves, MA RADT1Mission Viejo, CA 926911629511704
  7. Larry JablinMission Viejo, CA 926911962066944
  8. Joy JoshuaMission Viejo, CA 926911376198143

Common questions

What is Alison Catherine Dirienzo's NPI number?

Alison Catherine Dirienzo's National Provider Identifier (NPI) is 1497300560, issued on Aug 6, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Alison Catherine Dirienzo located?

The NPPES record lists a practice address at 27281 Las Ramblas Ste 140, Mission Viejo, CA, 92691. Phone: (949) 540-0170. Providers update this record themselves, so call before visiting.

How can I verify Alison Catherine Dirienzo'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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.