Hazel B. Abaya

Hazel Abaya practices at UCI Health - Placentia Linda in Placentia, California, part of UC Irvine.

Hazel Abaya's NPI, 1780116186, was assigned on April 3, 2017. Hazel Abaya holds California license A169439.

Hazel Abaya's primary practice is UCI Health - Placentia Linda, at 1301 N Rose Drive, Placentia, CA 92870.

Hazel Abaya's primary practice is UCI Health - Placentia Linda in Placentia, California, part of UC Irvine. Hazel Abaya is also affiliated with UCI Health - Orange. The medical group on file is Chest and Critical Care Consultants. Dmand AI also links Hazel Abaya to 2 more hospitals, 3 group practices and clinics, 3 medical groups and 1 hospital outpatient department, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Hazel Abaya practices, 8 sites in all. Vendor and product names are available with a free account.

Internal medicine is Hazel Abaya's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Hazel Abaya is licensed in California.

CMS data shows 1,793 Medicare services from Hazel Abaya across 8 procedure codes in 2024, for 431 Medicare patients. Medicare paid $171,874 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 431 Medicare patients who saw Hazel Abaya in 2024. The largest group is 85 and over, with 156 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 35% are also on Medicaid. Their average risk score is 2.66, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Hazel Abaya's median patient age at 67, with 48% women.

In 2024, Hazel Abaya wrote 277 Medicare Part D claims for 137 patients. 90% of them were for generic drugs. CMS names the drug for 50 of them, across 4 drugs with 11 or more claims each, at $273 in total drug cost. In 2023, CMS named 134 claims across 9 drugs.

Hazel Abaya accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 28 general payments to Hazel Abaya from 12 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $220.