Dr. Maria Catalina Merrick, DO

Dr. Merrick practices at Valleywise Health Medical Center in Phoenix, Arizona, part of Valleywise Health.

Dr. Merrick's NPI, 1629361829, was assigned on May 20, 2011. Dr. Merrick holds Illinois license 036140950.

Dr. Merrick's primary practice is Valleywise Health Medical Center, at 2601 East Roosevelt Street, Phoenix, AZ 85008 in Maricopa County. The practice phone is (602) 344-5011.

Dr. Merrick's primary practice is Valleywise Health Medical Center in Phoenix, Arizona, part of Valleywise Health. Dr. Merrick is also affiliated with Dignity Health St. Joseph's Hospital and Medical Center. The medical group on file is District Medical Group. Dmand AI also links Dr. Merrick to 1 more hospital, 2 medical groups and 1 dialysis center, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merrick practices, 4 sites in all. Vendor and product names are available with a free account.

Infectious disease is Dr. Merrick's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Merrick is licensed in Illinois.

CMS data shows 55 Medicare services from Dr. Merrick across 1 procedure code in 2024, all of them office visits, for 36 Medicare patients. Medicare paid $3,045 for them. Every service was in an office.

CMS counts 36 Medicare patients who saw Dr. Merrick in 2024. The largest group is under 65, with 18 patients. 72% of them have high cholesterol, and 67% have high blood pressure. 58% are also on Medicaid. Their average risk score is 2.04, 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. Merrick's median patient age at 50, with 42% women.

In 2024, Dr. Merrick wrote 3,535 Medicare Part D claims for 130 patients. 63% of them were for generic drugs. CMS names the drug for 3,058 of them, across 83 drugs with 11 or more claims each, at $3,131,918 in total drug cost. In 2023, CMS named 2,453 claims across 77 drugs.

Dr. Merrick accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 12 general payments to Dr. Merrick from 5 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 86% of the total. Gilead Sciences, Inc. paid the most, $418.