John Thomas Chon, D.O.
Emergency Medicine Physician · Covina, CA
John Thomas Chon, D.O. is an emergency medicine physician with a practice address in Covina, California, and NPI 1184691644, issued on Mar 3, 2006. Check the license (California 20A9192, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Thomas Chon
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A9192 CA
Self-reported in NPPES; status is on the state search - Practice location
- 210 W San Bernardino RD, Covina, CA 91723
- Phone
- (626) 375-1935
- Enumerated
- Mar 3, 2006
- Record last updated
- Oct 25, 2024
- Medicare enrollment
- Enrolled (PECOS I20050629000494); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 2002
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 210 W San Bernardino RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shaheen Akram, RNGeneral Practice Registered Nurse1730711037
- Wencylito Alivia, REGISTERED NURSEAdult Psychiatric/Mental Health Registered Nurse1861173189
- Ghada Assassa-Solh, M.DDiagnostic Radiology Physician1457313017
- Frishta Ataie, MDEmergency Medicine Physician1487940102
- Chase Atckison, DOFamily Medicine Physician1326576539
- John Bouz, DOAnesthesiology Physician1386210029
Verify John Thomas Chon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9192Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average emergency medicine physician in 2024
642 Medicare Part D claims for 363 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Nitrofurantoin Mono-Macro89 claims
- Prednisone84 claims
- Ibuprofen76 claims
- Amoxicillin-Clavulanate Potass46 claims
- Azithromycin41 claims
- Clindamycin Hcl39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $684.37
20 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Gem Medical Group CorporationWhittier, CA
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thomas Chon among 7,751 emergency medicine physician records in California
John Thomas Chon, D.O. 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. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 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.
All 7,751 in California → Every provider in Covina → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Sarah Anh, M.D.Covina, CA 917231104037159
- Frishta Ataie, MDCovina, CA 917231487940102
- Peter Kennedy, MDCovina, CA 917231619025665
- David Lee, D.OCovina, CA 917231265791529
- Robert Leonard, MDCovina, CA 917231013337641
- Rebeca Martin, MDCovina, CA 917231104313220
- Rio Sutikno-Ong, MDCovina, CA 917231629104526
- Thuy Nguyen, MDRancho Cucamonga, CA 917301336162858
Common questions
What is John Thomas Chon, D.O.'s NPI number?
John Thomas Chon, D.O.'s National Provider Identifier (NPI) is 1184691644, issued on Mar 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Chon, D.O. located?
The NPPES record lists a practice address at 210 W San Bernardino RD, Covina, CA, 91723. Phone: (626) 375-1935. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Chon, D.O.'s license?
NPPES lists California license number 20A9192, 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.
How much does John Thomas Chon, D.O. prescribe under Medicare Part D?
In 2024, John Thomas Chon, D.O. had 642 Medicare Part D claims for 363 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.