NPPES file of Aug 9, 2026

Dorine Lam, RDN

Registered Dietitian · Tustin, CA

Dorine Lam, RDN is a registered dietitian with a practice address in Tustin, California, and NPI 1538772595, issued on Aug 28, 2020. Check the license (California 505180, 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
1538772595
Name
Dorine Lam
Credential
RDN
Primary taxonomy
Registered Dietitian 133V00000X
License number
505180 CA
Self-reported in NPPES; status is on the state search
Practice location
2492 Walnut Ave Ste 100, Tustin, CA 92780
Phone
(714) 709-8000
Enumerated
Aug 28, 2020
Record last updated
Aug 28, 2020 (not updated in 6 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 registered dietitian records → All 7,148 in California → Look up another NPI →

Also registered at 2492 Walnut Ave Ste 100

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

  1. Carrie Lam, M.D.Family Medicine Physician1669822284
  2. Jeremy Lam, M.D.Internal Medicine Physician1083140172
  3. Brittani Laski, FNPPrimary Care Nurse Practitioner1912528829
  4. Kellie Nguyen, FNP-CFamily Nurse Practitioner1932886991
  5. Ning Sun, FNP-BCFamily Nurse Practitioner1003340977

Verify Dorine Lam 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 505180    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.

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Dorine Lam among 7,148 registered dietitian records in California

Dorine Lam, RDN 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 updated2020 · 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 Tustin → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Lucia Doshi, RD/RDN, MPHTustin, CA 927801487194130
  2. Elizabeth Nguyen, RDTustin, CA 927801205312634
  3. Eileen Hsiung, RDNTustin, CA 927821912507708
  4. Shahin Rostami, RDTustin, CA 927821831932177
  5. Kari Duenas, RDAnaheim, CA 928011114373164
  6. Darren Johnson, MPH, RDAnaheim, CA 928011619410305
  7. Sherlyn LeeAnaheim, CA 928011093022535
  8. Minal Patel, M.S., R.D.Anaheim, CA 928011417237629

Common questions

What is Dorine Lam, RDN's NPI number?

Dorine Lam, RDN's National Provider Identifier (NPI) is 1538772595, issued on Aug 28, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Dorine Lam, RDN located?

The NPPES record lists a practice address at 2492 Walnut Ave Ste 100, Tustin, CA, 92780. Phone: (714) 709-8000. Providers update this record themselves, so call before visiting.

How can I verify Dorine Lam, RDN's license?

NPPES lists California license number 505180, 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.