Dr. Merrill K. Shum, MD

Dr. Shum practices at Cancer and Blood Specialty Clinic in Torrance, California.

Dr. Shum's NPI, 1982819702, was assigned on May 14, 2007. Dr. Shum holds California license A98845.

Dr. Shum's primary practice is Cancer and Blood Specialty Clinic, at 23600 Telo Ave, Torrance, CA 90505 in Los Angeles County. The practice phone is (627) 254-3675.

Dr. Shum's primary practice is Cancer and Blood Specialty Clinic in Torrance, California. Dr. Shum is also affiliated with PIH Health Whittier Hospital. The medical group on file is PIH Health Physicians. Dmand AI also links Dr. Shum to 3 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shum practices, 6 sites in all. Vendor and product names are available with a free account.

Hematology and oncology is Dr. Shum's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dmand AI has Dr. Shum's licenses on file in 2 states: California and Pennsylvania.

CMS data shows 33,083 Medicare services from Dr. Shum across 27 procedure codes in 2024, for 461 Medicare patients. Medicare paid $763,352 for them.

CMS counts 461 Medicare patients who saw Dr. Shum in 2024. The largest group is 65 to 74, with 177 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 51% are also on Medicaid. Their average risk score is 3.55, 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. Shum's median patient age at 71, with 61% women.

In 2024, Dr. Shum wrote 576 Medicare Part D claims for 117 patients. 61% of them were for generic drugs. CMS names the drug for 289 of them, across 12 drugs with 11 or more claims each, at $839,460 in total drug cost.

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

Dmand AI links 2 papers to Dr. Shum in 2020. Dr. Shum's most frequent co-authors are David Berz, MD, MPH, PhD, Viralkumar K. Bhanderi, MD and Bo Chao, MD.

Dmand AI links Dr. Shum to 10 clinical trials, 4 of them phase 1/2 studies. 4 are still active or recruiting. Conditions studied include Endometrial Neoplasms, Inhibition, Psychological and Lymphoma, Large B-Cell, Diffuse. Aeglea Biotherapeutics sponsors the most, 2.

CMS Open Payments shows 541 general payments to Dr. Shum from 72 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 55% of the total. Sanofi and Genzyme US Companies paid the most, $3,802.