Dr. Eugene Jay Yoon, MD

Dr. Yoon practices at St. Jude Medical Center - Unit in Fullerton, California.

Dr. Yoon's NPI, 1861618449, was assigned on April 18, 2007. Dr. Yoon graduated from UVA School of Medicine in 2001. Dr. Yoon holds California license A81190.

Dr. Yoon's primary practice is St. Jude Medical Center - Unit, at 101 E. Valencia Mesa Drive, Fullerton, CA 92835 in Orange County. The practice phone is (714) 578-8706.

Dr. Yoon's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dr. Yoon is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Yoon to 1 more group practice or clinic, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yoon practices, 3 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Yoon's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Yoon is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Yoon is licensed in California.

Dmand AI lists acid reflux, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, fatty liver, gastroenteritis and intestinal diverticulosis among the conditions Dr. Yoon treats.

CMS data shows 814 Medicare services from Dr. Yoon across 15 procedure codes in 2024, for 498 Medicare patients. Medicare paid $76,178 for them.

CMS counts 498 Medicare patients who saw Dr. Yoon in 2024. The largest group is 65 to 74, with 244 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Yoon's median patient age at 67, with 55% women.

In 2024, Dr. Yoon wrote 1,086 Medicare Part D claims for 284 patients. 83% of them were for generic drugs. CMS names the drug for 837 of them, across 27 drugs with 11 or more claims each, at $226,613 in total drug cost. In 2023, CMS named 924 claims across 32 drugs.

Dr. Yoon accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Yoon as offering telehealth. CMS counts 276 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Yoon, more than 94% of the clinicians it reports for that procedure.

Dmand AI links 4 papers to Dr. Yoon, published from 2006 to 2007. Dr. Yoon's most frequent co-authors are Jae C Chang, MD, Kenneth J J. Chang, MD and John C. Hoefs, MD.

CMS Open Payments shows 851 general payments to Dr. Yoon from 48 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 93% of the total. Abbvie Inc. paid the most, $3,444.

Dmand AI lists 1 award for Dr. Yoon, most recently CMS Stage 1 EHR in 2012.

Dr. Yoon graduated from UVA School of Medicine in 2001. Dr. Yoon is a member of ASGE.

Dr. Yoon is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.