Harold J. Pyun, MSW
Social Worker · Fullerton, CA
Harold J. Pyun, MSW is a social worker with a practice address in Fullerton, California, and NPI 1356613053, issued on Jan 27, 2012. 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
- Harold J. Pyun
- Credential
- MSW
- Primary taxonomy
- Social Worker 104100000X
- Practice location
- 2258 Rosecrans Ave, Fullerton, CA 92833
- Phone
- (818) 984-3757
- Enumerated
- Jan 27, 2012
- Record last updated
- Jan 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (714) 441-0718
- Entity
- Type 1 · individual
8 nearest social worker records → All 10,332 in California → Look up another NPI →
Also registered at 2258 Rosecrans Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Harold J. Pyun 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
Harold J. Pyun among 10,332 social worker records in California
Harold J. Pyun, MSW is one of 10,332 social worker records with a practice address in California. 2% 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 2012, is newer than 26% of them.
- NPI issued2012 · 26% of these records are older, 71% newer
- In a Medicare fileNo · 2% of these records are
- In the CMS Doctors and Clinicians fileNo · 3% of these records are
- Record last updated2012 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Social Worker providers in California
There are 10,332 social worker records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 10,332 in California → Every provider in Fullerton → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Mariacristina NavajaFullerton, CA 928321053271395
- Charlin Flores, MSWFullerton, CA 928311396318804
- Amanda Frye, MSWFullerton, CA 928311124141965
- Noemy GallegosFullerton, CA 928311174351522
- Sylvia GarciaFullerton, CA 928311841364791
- Amber GonzalezFullerton, CA 928311205600665
- Eunice GuevaraFullerton, CA 928311700547593
- Sandra Hayden, LCSWFullerton, CA 928351831381490
Common questions
What is Harold J. Pyun, MSW's NPI number?
Harold J. Pyun, MSW's National Provider Identifier (NPI) is 1356613053, issued on Jan 27, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Harold J. Pyun, MSW located?
The NPPES record lists a practice address at 2258 Rosecrans Ave, Fullerton, CA, 92833. Phone: (818) 984-3757. Providers update this record themselves, so call before visiting.
How can I verify Harold J. Pyun, MSW'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.