Ji Il Jeon, MD
Infectious Disease Physician · Fresno, CA
Ji Il Jeon, MD is an infectious disease physician with a practice address in Fresno, California, and NPI 1710629043, issued on Apr 7, 2022. Check the license (California A201109, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ji Il Jeon
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A201109 CA
Self-reported in NPPES; status is on the state search - Practice location
- 155 N Fresno St # 307, Fresno, CA 93701
- Phone
- (559) 459-4502
- Enumerated
- Apr 7, 2022
- Record last updated
- Jul 30, 2026
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Verify Ji Il Jeon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A201109Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average infectious disease physician in 2024
85 Medicare Part D claims for 32 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of 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.
Ji Il Jeon among 1,119 infectious disease physician records in California
Ji Il Jeon, MD is one of 1,119 infectious disease 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 2022, is newer than 98% of them.
- NPI issued2022 · 98% of these records are older, 1% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Fresno → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Nancy Dang-Orita, MDFresno, CA 937011376006429
- Hebah Ghanem, MDFresno, CA 937011750867453
- Sang Jo Hwang, DOFresno, CA 937011013560994
- Robert Libke, M.D.Fresno, CA 937011497780985
- Michele Maison-Fomotar, MDFresno, CA 937011407210453
- Jessica McFarland, MDFresno, CA 937011932661840
- Anandit Mu, D.O., MPHFresno, CA 937011841465192
- Naiel Nassar, MDFresno, CA 937011699743617
Common questions
What is Ji Il Jeon, MD's NPI number?
Ji Il Jeon, MD's National Provider Identifier (NPI) is 1710629043, issued on Apr 7, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Ji Il Jeon, MD located?
The NPPES record lists a practice address at 155 N Fresno St # 307, Fresno, CA, 93701. Phone: (559) 459-4502. Providers update this record themselves, so call before visiting.
How can I verify Ji Il Jeon, MD's license?
NPPES lists California license number A201109, 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 Ji Il Jeon, MD prescribe under Medicare Part D?
In 2024, Ji Il Jeon, MD had 85 Medicare Part D claims for 32 beneficiaries; the average among infectious disease physician prescribers was 689. 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.