Dr. May C. Chien, MD

Dr. Chien practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Chien's NPI, 1417221326, was assigned on February 24, 2012. Dr. Chien holds California license A119918.

Dr. Chien's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Dr. Chien's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Chien to 1 more hospital, 2 group practices and clinics and 2 medical groups, each named with a free account. Dr. Chien's employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chien practices, 4 sites in all. Vendor and product names are available with a free account.

Pediatric hematology-oncology is Dr. Chien's primary specialty in the NPI Registry, under taxonomy code 2080P0207X. Dr. Chien is licensed in California.

CMS data shows 123 Medicare services from Dr. Chien across 5 procedure codes in 2024, for 97 Medicare patients. Medicare paid $15,793 for them.

CMS counts 97 Medicare patients who saw Dr. Chien in 2024. The largest group is 65 to 74, with 31 patients. 75% of them have high blood pressure, and 63% have high cholesterol. 36% are also on Medicaid. Their average risk score is 2.81, 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 34, with 54% women.

In 2024, Dr. Chien wrote 21 Medicare Part D claims. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $6,984 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 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 10 papers to Dr. Chien, published from 2020 to 2025. 2021 was the busiest year, with 2. The most frequent topics are Antibodies, Monoclonal and Lymphohistiocytosis, Hemophagocytic. Dr. Chien has published most often in Blood Adv. Dr. Chien's most frequent co-authors are Carl E. Allen, MD, Edward Malachi Behrens, MD and Deepika Bhatla, MD.

CMS Open Payments shows 5 general payments to Dr. Chien from 4 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 62% of the total. Sobi, Inc paid the most, $162.