Dr. Hitomi Hosoya, MD

Dr. Hosoya practices at Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System.

Dr. Hosoya's NPI, 1265895817, was assigned on March 31, 2016. Dr. Hosoya graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo in 2009. Dr. Hosoya holds California license A163013.

Dr. Hosoya's primary practice is Cedars-Sinai Medical Center, at 8700 Beverly Blvd, Los Angeles, CA 90048 in Los Angeles County. The practice phone is (310) 423-5000.

Dr. Hosoya's primary practice is Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System. Dr. Hosoya is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is Cedars-Sinai Medical Center.

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

Internal medicine is Dr. Hosoya's primary specialty in the NPI Registry, under taxonomy code 207RH0000X. The record also lists hematology. Dr. Hosoya is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Hosoya's licenses on file in 2 states: California and Pennsylvania.

Dmand AI lists anemia among the conditions Dr. Hosoya treats.

CMS data shows 100 Medicare services from Dr. Hosoya across 1 procedure code in 2024, for 39 Medicare patients. Medicare paid $10,608 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 39 Medicare patients who saw Dr. Hosoya in 2024. The largest group is 65 to 74, with 22 patients. 69% of them have high cholesterol, and 64% have high blood pressure. Their average risk score is 3.15, 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. Hosoya's median patient age at 61, with 43% women.

In 2024, Dr. Hosoya wrote 157 Medicare Part D claims for 17 patients. 96% of them were for generic drugs. CMS names the drug for 99 of them, across 2 drugs with 11 or more claims each, at $1,508 in total drug cost. In 2023, CMS named 62 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Hosoya for performance year 2024, reported as part of a group. Dr. Hosoya accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 22 papers to Dr. Hosoya, published from 2015 to 2025. 2025 was the busiest year, with 5. The most frequent topics are Multiple Myeloma, Immunotherapy, Adoptive and Receptors, Chimeric Antigen. Dr. Hosoya has published most often in Blood Adv. Dr. Hosoya's most frequent co-authors are Surbhi Sidana, MD, David Bernard Miklos, MD, PhD and Matthew Joshua Frank, MD, PhD.

CMS Open Payments shows 8 general payments to Dr. Hosoya from 4 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $174.

Dr. Hosoya graduated from Graduate School of Medicine and Faculty of Medicine, The University of Tokyo in 2009.

Dr. Hosoya 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, 4. Check the plan with the practice before a visit.