NPPES file of Aug 9, 2026

Peter C. Kwok, M.D.

Emergency Medicine Physician · Martinez, CA

Peter C. Kwok, M.D. is an emergency medicine physician with a practice address in Martinez, California, and NPI 1912945023, issued on Jun 2, 2006. Check the license (California G46548, 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
1912945023
Name
Peter C. Kwok
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
G46548 CA
Self-reported in NPPES; status is on the state search
Practice location
150 Muir RD, Martinez, CA 94553
Phone
(925) 372-2735
Enumerated
Jun 2, 2006
Record last updated
Jul 13, 2026
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 emergency medicine physician records → All 7,751 in California → Look up another NPI →

Also registered at 150 Muir RD

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

  1. Tanya Aaen, PH.D.Clinical Psychologist1477518561
  2. Pamela AdhlakhaOccupational Therapist1013016575
  3. Maria Affinito, LCSWClinical Social Worker1962395905
  4. Janet Alexander, MS-SLPSpeech-Language Pathologist1649214578
  5. Nigina Ali, PHARM.D.Oncology Pharmacist1760022545
  6. Anna AllenPharmacist1164909875

Verify Peter C. Kwok in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G46548    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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Peter C. Kwok among 7,751 emergency medicine physician records in California

Peter C. Kwok, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 60% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2026 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Emergency Medicine Physician providers in California

There are 7,751 emergency medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 7,751 in California → Every provider in Martinez → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Pyra Aarden, MDMartinez, CA 945531417058199
  2. Joseph BargerMartinez, CA 945531609934801
  3. Jon Beauchamp, M. D.Martinez, CA 945531396822193
  4. David Goldstein, MDMartinez, CA 945531215010962
  5. Ritu MalikMartinez, CA 945531265575815
  6. Rebecca Miller, MDMartinez, CA 945531184884595
  7. David Reedy, MDMartinez, CA 945531881636058
  8. Patrice RingoMartinez, CA 945531497968457

Common questions

What is Peter C. Kwok, M.D.'s NPI number?

Peter C. Kwok, M.D.'s National Provider Identifier (NPI) is 1912945023, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Peter C. Kwok, M.D. located?

The NPPES record lists a practice address at 150 Muir RD, Martinez, CA, 94553. Phone: (925) 372-2735. Providers update this record themselves, so call before visiting.

How can I verify Peter C. Kwok, M.D.'s license?

NPPES lists California license number G46548, 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.