Registry data as of Aug 27, 2026

Justin Ammen

Occupational Therapy Assistant · Rosemead, CA

Justin Ammen is an occupational therapy assistant with a practice address in Rosemead, California, and NPI 1972231074, issued on Aug 8, 2022. Check the license (California 462171, 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, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1972231074
Name
Justin Ammen
Primary taxonomy
Occupational Therapy Assistant 224Z00000X
License number
462171 CA
Self-reported in NPPES; status is on the state search
Practice location
9337 Marshall St, Rosemead, CA 91770
Phone
(626) 475-8680
Enumerated
Aug 8, 2022
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.
Download card Updates feed

Verify Justin Ammen 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 462171    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

Occupational Therapy Assistant providers in California

There are 1,875 occupational therapy assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,875 in California → Every provider in Rosemead →

Other occupational therapy assistant records in California

  1. Shanon AarupPalm Desert, CA1346487758
  2. Deo AbilleBurbank, CA1417619396
  3. Olanrewaju Abimbola, COTASacramento, CA1265812473
  4. Genevieve Ablola, COTA/LSan Diego, CA1336556471
  5. Terence Abram, COTA/LLa Mesa, CA1740745975
  6. Christopher AbroginaFullerton, CA1740829894
  7. Christine AbucejoRancho Cucamonga, CA1780397109
  8. Cristina AcevedoMerced, CA1700582558
  9. Keiko Achiwa, COTA/LArcadia, CA1750147542
  10. Jobelle Rose Acosta, COTA/LArcadia, CA1235062415

Common questions

What is Justin Ammen's NPI number?

Justin Ammen's National Provider Identifier (NPI) is 1972231074, issued on Aug 8, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Justin Ammen located?

The NPPES record lists a practice address at 9337 Marshall St, Rosemead, CA, 91770. Phone: (626) 475-8680. Providers update this record themselves, so call before visiting.

How can I verify Justin Ammen's license?

NPPES lists California license number 462171, 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.