Dr. Gerald D. Hagin, MD

Dr. Hagin practices at Toi Oro Valley in Cerritos, California.

Dr. Hagin's NPI, 1285606483, was assigned on February 2, 2006. Dr. Hagin graduated from Icahn School of Medicine at Mount Sinai in 1975. Dr. Hagin holds Arizona license 10570.

Dr. Hagin's primary practice is Toi Oro Valley, at 18000 Studebaker Rd, Cerritos, CA 90703 in Los Angeles County. The practice phone is (520) 276-2270.

Dr. Hagin's primary practice is Toi Oro Valley in Cerritos, California. Dr. Hagin is also affiliated with Verde Valley Medical Center. The medical group on file is The Oncology Institute of Hope and Innovation. Dmand AI also links Dr. Hagin to 1 more group practice or clinic and 1 medical group, each named with a free account.

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

Medical oncology is Dr. Hagin's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Hagin is licensed in Arizona.

CMS data shows 92 Medicare services from Dr. Hagin across 3 procedure codes in 2024, all of them office visits, for 82 Medicare patients. Medicare paid $5,896 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 82 Medicare patients who saw Dr. Hagin in 2024. The largest group is 65 to 74, with 38 patients. 68% of them have high cholesterol, and 65% have high blood pressure. Their average risk score is 1.73, 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. Hagin's median patient age at 72, with 55% women.

In 2024, Dr. Hagin wrote 56 Medicare Part D claims for 29 patients. 77% of them were for generic drugs. CMS names the drug for 55 of them, across 3 drugs with 11 or more claims each, at $421,348 in total drug cost. In 2021, CMS named 103 claims across 7 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Hagin for performance year 2024, reported as part of a group. Dr. Hagin accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hagin as offering telehealth.

CMS Open Payments shows 75 general payments to Dr. Hagin from 37 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Merck Sharp & Dohme Corporation paid the most, $209.

Dr. Hagin graduated from Icahn School of Medicine at Mount Sinai in 1975.