NPPES file of Aug 9, 2026

Walter Otha Clark, CATC II

Addiction (Substance Use Disorder) Counselor · Riverside, CA

Walter Otha Clark, CATC II is an addiction (substance use disorder) counselor with a practice address in Riverside, California, and NPI 1811230980, issued on Mar 27, 2013. Check the license (California 133051 II, 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.

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

NPPES recordNPPES file of Aug 9, 2026
1811230980
Name
Walter Otha Clark
Credential
CATC II
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License numbers
133051 II CA
3051-I CA
Self-reported in NPPES; status is on the state search
Practice location
3525 Presley Ave, Riverside, CA 92507
Phone
(951) 782-2400
Enumerated
Mar 27, 2013
Record last updated
Aug 22, 2013 (not updated in 13 years: call before relying on the address or phone)
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 3525 Presley Ave

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

  1. Lisa AlanizCase Manager/Care Coordinator1215612247
  2. Maribel BanuelosAddiction (Substance Use Disorder) Counselor1497259535
  3. Stacey BarnettCase Manager/Care Coordinator1033657721
  4. Lynn Basso, CADCIICase Manager/Care Coordinator1558683235
  5. Nerininfa BernabeCase Manager/Care Coordinator1588165120
  6. Joseph CluettAddiction (Substance Use Disorder) Counselor1770939720

Verify Walter Otha Clark in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 133051 II    Check 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
Find the California license search

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Walter Otha Clark among 27,741 addiction (substance use disorder) counselor records in California

Walter Otha Clark, CATC II 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 2013, is newer than 28% of them.

  • NPI issued2013 · 28% of these records are older, 69% 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 updated2013 · 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).

441 addiction (substance use disorder) counselor records list a practice address in Riverside

They are 441 of the 13,893 NPPES records with a practice address in Riverside, 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 Riverside → Addiction (Substance Use Disorder) Counselor nationwide →

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

  1. Kimberly ArchibekRiverside, CA 925071619010659
  2. Alfred BellRiverside, CA 925071073647996
  3. Sean Bills, CADC-IIRiverside, CA 925071427196823
  4. Keith BooneRiverside, CA 925071174667091
  5. Ralph BravoRiverside, CA 925071124232012
  6. Ron Brunelle, B.A.,CADC,IIRiverside, CA 925071255469243
  7. John Cahill, SUDCC IIRiverside, CA 925071598899106
  8. Rose CastroRiverside, CA 925071851434864

Common questions

What is Walter Otha Clark, CATC II's NPI number?

Walter Otha Clark, CATC II's National Provider Identifier (NPI) is 1811230980, issued on Mar 27, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Walter Otha Clark, CATC II located?

The NPPES record lists a practice address at 3525 Presley Ave, Riverside, CA, 92507. Phone: (951) 782-2400. Providers update this record themselves, so call before visiting.

How can I verify Walter Otha Clark, CATC II's license?

NPPES lists California license number 133051 II, 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.

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.