NPPES file of Aug 9, 2026

Marilyn Koo

Addiction (Substance Use Disorder) Counselor · Long Beach, CA

Marilyn Koo is an addiction (substance use disorder) counselor with a practice address in Long Beach, California, and NPI 1700454709, issued on Jun 15, 2021. 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
1700454709
Name
Marilyn Koo
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
Practice location
1360 E Anaheim St, Long Beach, CA 90813
Phone
(562) 218-9530
Enumerated
Jun 15, 2021
Record last updated
Jun 15, 2021 (not updated in 5 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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Also registered at 1360 E Anaheim St

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

  1. Kelly JavonilloAddiction (Substance Use Disorder) Counselor1437764362
  2. Brandon Nguyen, D.M.DGeneral Practice Dentistry1841315611

Verify Marilyn Koo 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
Find the California license search

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624 addiction (substance use disorder) counselor records list a practice address in Long Beach

They are 624 of the 13,650 NPPES records with a practice address in Long Beach, 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 624 in Long Beach → All 27,741 in California → Every provider in Long Beach →

Other addiction (substance use disorder) counselor records in California

  1. Sean A Jerome, CADCIICosta Mesa, CA1831884550
  2. Carrie AamodtVisalia, CA1932661311
  3. Emory Aaron, CCAPP C4321214Los Angeles, CA1073980801
  4. Lisa Aaron, CASACCulver City, CA1356090849
  5. Michael Abacherli, JD, RADTSan Jacinto, CA1235826983
  6. Victor AbadEl Cajon, CA1205562238
  7. Sean AbairTaft, CA1174084347
  8. Maira AbalosDelano, CA1508452038
  9. Jazmine AbanicoVentura, CA1851964613
  10. Israel Abarca, CAADESan Francisco, CA1114126950

Common questions

What is Marilyn Koo's NPI number?

Marilyn Koo's National Provider Identifier (NPI) is 1700454709, issued on Jun 15, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Marilyn Koo located?

The NPPES record lists a practice address at 1360 E Anaheim St, Long Beach, CA, 90813. Phone: (562) 218-9530. Providers update this record themselves, so call before visiting.

How can I verify Marilyn Koo'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.