NPPES file of Aug 9, 2026

Catherine Ko, R.D.

Registered Dietitian · Arcadia, CA

Catherine Ko, R.D. is a registered dietitian with a practice address in Arcadia, California, and NPI 1598015810, issued on Sep 13, 2012. Check the license (California 1055191, 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
1598015810
Name
Catherine Ko
Credential
R.D.
Primary taxonomy
Registered Dietitian 133V00000X
License number
1055191 CA
Self-reported in NPPES; status is on the state search
Practice location
650 W Duarte RD, Arcadia, CA 91007
Phone
(626) 446-1740
Enumerated
Sep 13, 2012
Record last updated
Sep 13, 2012 (not updated in 14 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 650 W Duarte RD

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

  1. Wan-Kai Chao, PTPhysical Therapist1629363320
  2. Morgan Huang, MDOphthalmology Physician1790792281
  3. Albern Lee, RPTPhysical Therapist1770811572
  4. Leonard Lem, M.D., D.D.S.Oral and Maxillofacial Pathology Dentistry1356357636
  5. Siqing Li, M.D.Psychiatry Physician1942243910
  6. Ryan Lim, PT, DPTPhysical Therapist1265145205

Verify Catherine Ko 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 1055191    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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Catherine Ko among 7,148 registered dietitian records in California

Catherine Ko, R.D. 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 2012, is newer than 26% of them.

  • NPI issued2012 · 26% of these records are older, 71% newer
  • In a Medicare fileNo · 5% of these records are
  • In the CMS Doctors and Clinicians fileNo · 7% of these records are
  • Record last updated2012 · 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 Arcadia → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Christy Chang, RDNArcadia, CA 910071295318491
  2. Annie Chen, RDArcadia, CA 910071487081501
  3. Stephanie Esquivel, RDNArcadia, CA 910071508640368
  4. Yun Chieh Huang, MS, RDArcadia, CA 910071427659796
  5. Melody Meloserdoff, RDArcadia, CA 910071003524000
  6. Shirley Saker, RDNArcadia, CA 910071790647493
  7. Ashanty Soto, RDNArcadia, CA 910071558993709
  8. Courtney Woo, RDNArcadia, CA 910071982063301

Common questions

What is Catherine Ko, R.D.'s NPI number?

Catherine Ko, R.D.'s National Provider Identifier (NPI) is 1598015810, issued on Sep 13, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Catherine Ko, R.D. located?

The NPPES record lists a practice address at 650 W Duarte RD, Arcadia, CA, 91007. Phone: (626) 446-1740. Providers update this record themselves, so call before visiting.

How can I verify Catherine Ko, R.D.'s license?

NPPES lists California license number 1055191, 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.