Joseph D. Chun, M.D.
Allergy & Immunology Physician · Fullerton, CA
Joseph D. Chun, M.D. is an allergy & immunology physician with a practice address in Fullerton, California, and NPI 1710015425, issued on Mar 2, 2007. Check the license (California G61950, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph D. Chun
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- G61950 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1501 W Commonwealth Ave, Fullerton, CA 92833
- Phone
- (714) 410-3100
- Enumerated
- Mar 2, 2007
- Record last updated
- Feb 4, 2026
- Medicaid ID
- GR00088840 CA
- Medicare enrollment
- Enrolled (PECOS I20110615000398); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 1501 W Commonwealth Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Aldana, MDFamily Medicine Physician1528062106
- Alexis Galschiodt, DOFamily Medicine Physician1124606082
- Sonaina Imtiaz, MDEndocrinology, Diabetes & Metabolism Physician1376959510
- Jenny MoAcute Care Nurse Practitioner1679242960
- Ewelina Szymanowicz, NPFamily Nurse Practitioner1740674415
Verify Joseph D. Chun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G61950Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17.6 times the Medicare Part D claims of the average allergy & immunology physician in 2024
13,010 Medicare Part D claims for 847 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 68 claims were for opioids.
Most prescribed
- Atorvastatin Calcium973 claims
- Losartan Potassium885 claims
- Amlodipine Besylate816 claims
- Rosuvastatin Calcium605 claims
- Metformin Hcl509 claims
- Levothyroxine Sodium366 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: $37.53
2 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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 one group practice
- Healthcare Partners Affiliates Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph D. Chun among 444 allergy & immunology physician records in California
Joseph D. Chun, M.D. is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 38% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 281 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Fullerton → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Sahar Faghih, D.O.Fullerton, CA 928331194914226
- Maheshkumar Vyas, M.D.Anaheim, CA 928081942279633
- Raffaele Davidovich, MDAnaheim, CA 928011174528657
- Wan-Yin Chan, M.D.Orange, CA 928681932391471
- Stanley Galant, MDOrange, CA 928681780799809
- William Harris, MDOrange, CA 928681922065788
- Yela Jung, MDOrange, CA 928681780145573
- Donald Levy, MDOrange, CA 928681518055011
Common questions
What is Joseph D. Chun, M.D.'s NPI number?
Joseph D. Chun, M.D.'s National Provider Identifier (NPI) is 1710015425, issued on Mar 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Joseph D. Chun, M.D. located?
The NPPES record lists a practice address at 1501 W Commonwealth Ave, Fullerton, CA, 92833. Phone: (714) 410-3100. Providers update this record themselves, so call before visiting.
How can I verify Joseph D. Chun, M.D.'s license?
NPPES lists California license number G61950, 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 Joseph D. Chun, M.D. prescribe under Medicare Part D?
In 2024, Joseph D. Chun, M.D. had 13,010 Medicare Part D claims for 847 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.