Dr. Alexander Chi Chen, MD

Dr. Chen practices at Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health.

Dr. Chen's NPI, 1881802783, was assigned on May 21, 2007. Dr. Chen graduated from University of Missouri, Kansas City, School of Medicine in 2001. Dr. Chen holds Missouri license 2004016896.

Dr. Chen's primary practice is Barnes-Jewish Hospital, at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 in St. Louis City. The practice phone is (314) 747-3000. Dr. Chen also practices at Barnes-Jewish Hospital, 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110.

Dr. Chen's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. Dr. Chen is also affiliated with Missouri Baptist Medical Center. The medical group on file is WashU Medicine Psychiatry. Dmand AI also links Dr. Chen to 2 more hospitals and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 5 sites in all. Vendor and product names are available with a free account.

Pulmonary disease is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Chen is licensed in Missouri.

CMS data shows 352 Medicare services from Dr. Chen across 10 procedure codes in 2024, for 229 Medicare patients. Medicare paid $33,928 for them.

CMS counts 229 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 121 patients. 75% of them have high blood pressure, and 69% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.23, 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. Chen's median patient age at 72, with 55% women.

In 2024, Dr. Chen wrote 26 Medicare Part D claims for 14 patients. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $5,408 in total drug cost. In 2022, CMS named 12 claims across 1 drug.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Chen for performance year 2024, reported as part of a group. Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 38 papers to Dr. Chen, published from 2011 to 2025. 2019 was the busiest year, with 5. The most frequent topics are Bronchoscopy, Lung Neoplasms and Carcinoma, Non-Small-Cell Lung. Dr. Chen has published most often in Chest. Dr. Chen's most frequent co-authors are Gerard A. Silvestri, MD, Nicholas James Pastis, MD and Lonny Yarmus, DO.

Dmand AI links Dr. Chen to 7 clinical trials, 2 of them phase 1 studies. 1 is still active or recruiting. Conditions studied include Pleural Effusion, Carcinoma, Non-Small-Cell Lung and Pleural Effusion, Malignant. Washington University School of Medicine sponsors the most, 5.

CMS Open Payments shows 1,438 general payments to Dr. Chen from 29 drug and device companies from 2016 to 2025. Education make up the largest share, 53% of the total. Olympus Corporation of the Americas paid the most, $605,745. It also lists 1 research payment totaling $3,900 in 2018.

Dr. Chen graduated from University of Missouri, Kansas City, School of Medicine in 2001.