Dr. James Y. Hyun, MD

Dr. Hyun practices at Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center.

Dr. Hyun's NPI, 1518941624, was assigned on December 1, 2005. Dr. Hyun graduated from New York Medical College in 1994. Dr. Hyun holds California license A67698.

Dr. Hyun's primary practice is Pomona Valley Hospital Medical Center, at 1798 N Garey Ave, Pomona, CA 91767 in Los Angeles County. The practice phone is (909) 865-9500.

Dr. Hyun's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center. Dr. Hyun is also affiliated with CHRISTUS Health. The medical group on file is Harbor-UCLA Medical Center. Dmand AI also links Dr. Hyun to 2 more hospitals, 10 medical groups and 7 group practices and clinics, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hyun practices, 11 sites in all. Vendor and product names are available with a free account.

Diagnostic radiology is Dr. Hyun's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Hyun is board certified in diagnostic radiology by the American Board of Radiology. Dmand AI has Dr. Hyun's licenses on file in 15 states: California, New Mexico, Florida, Nevada, Arizona, Georgia, Illinois, Kentucky, New York, Ohio, Virginia, Kansas, South Carolina, Idaho and Colorado.

CMS data shows 719 Medicare services from Dr. Hyun across 16 procedure codes in 2024, for 588 Medicare patients. Medicare paid $28,198 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 588 Medicare patients who saw Dr. Hyun in 2024. The largest group is 75 to 84, with 229 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Hyun's median patient age at 54, with 47% women.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Hyun for performance year 2024, reported as part of a group. Dr. Hyun accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 4 papers to Dr. Hyun, published from 2019 to 2024. The most frequent topics are Endothelial Cells, Receptor, Notch1 and Receptors, Notch. Dr. Hyun's most frequent co-author is Jalees Rehman, MD.

CMS Open Payments shows 2 general payments to Dr. Hyun from 2 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Telix Pharmaceuticals paid the most, $25.

Dr. Hyun graduated from New York Medical College in 1994.

Dr. Hyun is in network with 10 carriers, including Elevance, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.