NPPES file of Aug 9, 2026

James Leon Kay, D.O.

Pediatrics Physician · Lake Forest, CA

James Leon Kay, D.O. is a pediatrics physician with a practice address in Lake Forest, California, and NPI 1962616656, issued on May 10, 2007. Check the license (California 20A9075, as entered in NPPES) on the Medical Board of California; 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
1962616656
Name
James Leon Kay
Credential
D.O.
Primary taxonomy
Pediatrics Physician 208000000X
License number
20A9075 CA
Self-reported in NPPES; status is on the state search
Practice location
24432 Muirlands Blvd, Lake Forest, CA 92630
Phone
(949) 364-2229
Enumerated
May 10, 2007
Record last updated
Dec 16, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(949) 364-1104
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 pediatrics physician records → All 9,272 in California → Look up another NPI →

Also registered at 24432 Muirlands Blvd

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

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  3. Michael Grossman, M.D.Family Medicine Physician1942367008
  4. Azin Meshkinpour, M.D., M.P.H.Dermatology Physician1205802089
  5. Darren Terry, D.P.T.Physical Therapist1336412998

Verify James Leon Kay in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 20A9075    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
Open the California license search

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James Leon Kay among 9,272 pediatrics physician records in California

James Leon Kay, D.O. is one of 9,272 pediatrics physician records with a practice address in California. 31% 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 2007, is newer than 44% of them.

  • NPI issued2007 · 44% of these records are older, 43% newer
  • In a Medicare fileNo · 31% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • Record last updated2014 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatrics Physician providers in California

There are 9,272 pediatrics physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 9,272 in California → Every provider in Lake Forest → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Eric Ball, M.D.Lake Forest, CA 926301316032972
  2. Regina Brown, M.D.Lake Forest, CA 926301891892204
  3. Terence Chu, M.D.Lake Forest, CA 926301801991864
  4. James Su, MDLake Forest, CA 926301457980278
  5. Katherine Williamson, MDLake Forest, CA 926301982916375
  6. Roman Misiow, M.D.Dana Point, CA 926291205999000
  7. Iman Bar, MDCosta Mesa, CA 926271326127804
  8. Eugene Chen, MDCosta Mesa, CA 926271417933243

Common questions

What is James Leon Kay, D.O.'s NPI number?

James Leon Kay, D.O.'s National Provider Identifier (NPI) is 1962616656, issued on May 10, 2007. An NPI identifies a provider in billing; it is not a license.

Where is James Leon Kay, D.O. located?

The NPPES record lists a practice address at 24432 Muirlands Blvd, Lake Forest, CA, 92630. Phone: (949) 364-2229. Providers update this record themselves, so call before visiting.

How can I verify James Leon Kay, D.O.'s license?

NPPES lists California license number 20A9075, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.