Dr. Chun Joey Chang, MD

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

Dr. Chang's NPI, 1003015462, was assigned on July 16, 2007. Dr. Chang graduated from David Geffen School of Medicine at UCLA in 2006. Dr. Chang holds California license A106131.

Dr. Chang'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. Chang's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center. Dr. Chang is also affiliated with Providence St. Mary Medical Center. The medical group on file is Vituity. Dmand AI also links Dr. Chang to 5 more hospitals and 17 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 7 sites in all. Vendor and product names are available with a free account.

Emergency medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chang is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Maryland.

CMS data shows 949 Medicare services from Dr. Chang across 6 procedure codes in 2024, for 586 Medicare patients. Medicare paid $92,832 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 586 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 213 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 59% are also on Medicaid. Their average risk score is 2.90, 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. Chang's median patient age at 44, with 57% women.

In 2024, Dr. Chang wrote 695 Medicare Part D claims for 352 patients. 96% of them were for generic drugs. CMS names the drug for 571 of them, across 20 drugs with 11 or more claims each, at $3,782 in total drug cost. In 2023, CMS named 668 claims across 19 drugs.

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

Dmand AI links 16 papers to Dr. Chang, published from 2009 to 2021. 2014 was the busiest year, with 3. The most frequent topics are Carcinoma, Squamous Cell, Breast Neoplasms and Cell Line, Tumor.

CMS Open Payments shows 23 general payments to Dr. Chang from 7 drug and device companies from 2023 to 2025. Travel and lodging make up the largest share, 62% of the total. Merz North America, Inc. paid the most, $2,486.

Dmand AI lists 5 awards for Dr. Chang, most recently Appreciation Award for Clinical Excellence in 2018. Dr. Chang serves on Doctors Medical Center Pharmacy Committee.

Dr. Chang graduated from David Geffen School of Medicine at UCLA in 2006. Dr. Chang is a member of AAFP, American Board of Physician Specialties, ACEP, California Academy of Family Physicians and California ACEP.

Dr. Chang is in network with 4 carriers, including United Healthcare, Blue Cross Blue Shield of Massachusetts and CMS Medicare. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.