Dr. Brian Yunon Feng, DO

Dr. Feng practices at Mission Hospital - Unit in Mission Viejo, California.

Dr. Feng's NPI, 1508245473, was assigned on May 26, 2015. Dr. Feng graduated from Touro College of Osteopathic Medicine - New York in 2015. Dr. Feng holds California license 20A17160.

Dr. Feng's primary practice is Mission Hospital - Unit, at 27700 Medical Center Rd, Mission Viejo, CA 92691 in Orange County. The practice phone is (949) 365-2447.

Dr. Feng's primary practice is Mission Hospital - Unit in Mission Viejo, California. The medical group on file is Vituity. Dmand AI also links Dr. Feng to 2 more medical groups, each named with a free account.

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

Emergency medicine is Dr. Feng's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Feng is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Feng is licensed in California.

CMS data shows 622 Medicare services from Dr. Feng across 5 procedure codes in 2024, for 514 Medicare patients. Medicare paid $80,990 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 514 Medicare patients who saw Dr. Feng in 2024. The largest group is 75 to 84, with 192 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.01, 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. Feng's median patient age at 53, with 56% women.

In 2024, Dr. Feng wrote 287 Medicare Part D claims for 205 patients. 92% of them were for generic drugs. CMS names the drug for 131 of them, across 8 drugs with 11 or more claims each, at $712 in total drug cost. In 2023, CMS named 57 claims across 3 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Feng for performance year 2024, reported as part of a group.

Dmand AI links 10 papers to Dr. Feng, published from 2011 to 2025. 2018 was the busiest year, with 3. The most frequent topics are Escherichia coli, Anti-Bacterial Agents and Microbial Sensitivity Tests. Dr. Feng has published most often in ACS Infect Dis. Dr. Feng's most frequent co-author is Anthony Eugene Oro, MD.

CMS Open Payments shows 3 general payments to Dr. Feng from 2 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 95% of the total. Eli Lilly and Company paid the most, $128.

Dr. Feng graduated from Touro College of Osteopathic Medicine - New York in 2015.

Dr. Feng is in network with 1 carrier, including NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.