NPPES file of Aug 9, 2026

Oscar Jan, MS RD

Registered Dietitian · Garden Grove, CA

Oscar Jan, MS RD is a registered dietitian with a practice address in Garden Grove, California, and NPI 1386260826, issued on Jun 21, 2020. 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
1386260826
Name
Oscar Jan
Credential
MS RD
Primary taxonomy
Registered Dietitian 133V00000X
Practice location
13300 Garden Grove Blvd, Garden Grove, CA 92843
Phone
(714) 246-8400
Enumerated
Jun 21, 2020
Record last updated
Sep 17, 2025
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 registered dietitian records → All 7,148 in California → Look up another NPI →

Also registered at 13300 Garden Grove Blvd

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

  1. Cheryl Carnwath, RDRegistered Dietitian1386563401
  2. Erika ChavezMedical Physician Assistant1356261432
  3. Raul Diaz, RNGerontology Registered Nurse1770409179
  4. David Hernandez, LVNLicensed Vocational Nurse1265358873
  5. Lidia Hernandez, LCSWClinical Social Worker1417278144
  6. Brianne KennedySpeech-Language Pathologist1417826645

Verify Oscar Jan 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

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

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Oscar Jan among 7,148 registered dietitian records in California

Oscar Jan, MS RD is one of 7,148 registered dietitian records with a practice address in California. 5% 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 2020, is newer than 55% of them.

  • NPI issued2020 · 55% of these records are older, 39% newer
  • In a Medicare fileNo · 5% of these records are
  • In the CMS Doctors and Clinicians fileNo · 7% of these records are
  • Record last updated2025 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Registered Dietitian providers in California

There are 7,148 registered dietitian records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 7,148 in California → Every provider in Garden Grove → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Cheryl Carnwath, RDGarden Grove, CA 928431386563401
  2. Anna Morales, R.D.Garden Grove, CA 928431679943450
  3. Tu Nguyen, RDGarden Grove, CA 928431588090906
  4. Rhonda Ray, R.D.Garden Grove, CA 928431720132244
  5. Victor Blais, PH.D.Garden Grove, CA 928451194643064
  6. Pamela Qiao, RDGarden Grove, CA 928451558041848
  7. Jasmine Stoelting, RDNGarden Grove, CA 928411174309710
  8. Adriana Anestis, RDGarden Grove, CA 928401508647728

Common questions

What is Oscar Jan, MS RD's NPI number?

Oscar Jan, MS RD's National Provider Identifier (NPI) is 1386260826, issued on Jun 21, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Oscar Jan, MS RD located?

The NPPES record lists a practice address at 13300 Garden Grove Blvd, Garden Grove, CA, 92843. Phone: (714) 246-8400. Providers update this record themselves, so call before visiting.

How can I verify Oscar Jan, MS RD'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.