Dr. Amy Jo Chien, MD

Dr. Chien practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.

Dr. Chien's NPI, 1922242932, was assigned on April 22, 2009. Dr. Chien graduated from Harvard Medical School in 2003. Dr. Chien's California license number on file is A95906.

Dr. Chien's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.

Dr. Chien's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Chien is also affiliated with UCSF Langley Porter Psychiatric Hospital. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Chien to 3 more medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chien practices, 2 sites in all. Vendor and product names are available with a free account.

Medical oncology is Dr. Chien's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Chien is board certified in medical oncology by the American Board of Internal Medicine. Dr. Chien has a license on file in California.

Dmand AI lists breast cancer, lung cancer and prostate cancer among the conditions Dr. Chien treats.

CMS data shows 494 Medicare services from Dr. Chien across 6 procedure codes in 2024, for 135 Medicare patients. Medicare paid $35,285 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 135 Medicare patients who saw Dr. Chien in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have cancer, and 59% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.91, 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. Chien's median patient age at 62, with 89% women.

In 2024, Dr. Chien wrote 178 Medicare Part D claims for 58 patients. 79% of them were for generic drugs. CMS names the drug for 136 of them, across 3 drugs with 11 or more claims each, at $372,121 in total drug cost. In 2023, CMS named 140 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Chien for performance year 2024, reported as part of a group. Dr. Chien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chien as offering telehealth.

Dmand AI links 56 papers to Dr. Chien, published from 2009 to 2023. 2021 was the busiest year, with 8. The most frequent topics are Breast Neoplasms, Receptor, ErbB-2 and Antineoplastic Combined Chemotherapy Protocols. Dr. Chien has published most often in Breast Cancer Res Treat. Dr. Chien's most frequent co-authors are Hope S. Rugo, MD, Laura J. Esserman, MD and Michelle Elizabeth Melisko, MD.

Dmand AI links Dr. Chien to 3 clinical trials. 1 is still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Pathologic Complete Response. University of California, San Francisco sponsors the most, 2.

CMS Open Payments shows 32 general payments to Dr. Chien from 10 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 88% of the total. Genentech, Inc. paid the most, $12,155. It also lists 1 research payment totaling $330 in 2025.

Dmand AI lists 1 award for Dr. Chien, most recently CMS Stage 1 EHR in 2013.

Dr. Chien graduated from Harvard Medical School in 2003.

Dr. Chien is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.