NPPES file of Aug 9, 2026

Jay Westphal, M.D.

Preventive Medicine/Occupational Environmental Medicine Physician · Irvine, CA

Jay Westphal, M.D. is a preventive medicine/occupational environmental medicine physician with a practice address in Irvine, California, and NPI 1457605115, issued on Nov 2, 2012. Check the license (California G49416, 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
1457605115
Name
Jay Westphal
Credential
M.D.
Primary taxonomy
Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
License number
G49416 CA
Self-reported in NPPES; status is on the state search
Practice location
4 Park Plz, Irvine, CA 92614
Phone
(949) 351-9890
Enumerated
Nov 2, 2012
Record last updated
Nov 2, 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.
Download card Updates feed

8 nearest preventive medicine/occupational environmental medicine physician records → All 129 in California → Look up another NPI →

Also registered at 4 Park Plz

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

  1. Thanh-Lan Ly, NP-CFamily Nurse Practitioner1619150893
  2. Steven Rosen, M.D.Occupational Medicine Physician1457612236

Verify Jay Westphal in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G49416    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

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

Is this page about you? You can ask us to correct, restrict or remove it: how.

Jay Westphal among 129 preventive medicine/occupational environmental medicine physician records in California

Jay Westphal, M.D. is one of 129 preventive medicine/occupational environmental medicine physician records with a practice address in California. 32% 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 78% of them.

  • NPI issued2012 · 78% of these records are older, 16% newer
  • In a Medicare fileNo · 32% of these records are
  • In the CMS Doctors and Clinicians fileNo · 11% of these records are
  • Record last updated2012 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Preventive Medicine/Occupational Environmental Medicine Physician providers in California

There are 129 preventive medicine/occupational environmental medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 129 in California → Every provider in Irvine → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →

The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes

  1. Herbert Jennings, MDIrvine, CA 926141730246083
  2. Ronald Wempen, MDIrvine, CA 926181497880538
  3. Gonzalo Ruiz, M.D.Lake Forest, CA 926301982613253
  4. Scott Nelson, D.O., FACEPLaguna Woods, CA 926371285696278
  5. Roger Hinkson, MDHuntington Beach, CA 926461902923147
  6. David Cheshire, M.D.Huntington Beach, CA 926481134261829
  7. Virginia Schaefer, MDLaguna Beach, CA 926511790952190
  8. Jeffrey Vogel, M.D.Rancho Santa Margarita, CA 926881114218682

Common questions

What is Jay Westphal, M.D.'s NPI number?

Jay Westphal, M.D.'s National Provider Identifier (NPI) is 1457605115, issued on Nov 2, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Jay Westphal, M.D. located?

The NPPES record lists a practice address at 4 Park Plz, Irvine, CA, 92614. Phone: (949) 351-9890. Providers update this record themselves, so call before visiting.

How can I verify Jay Westphal, M.D.'s license?

NPPES lists California license number G49416, 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.