Dr. Mostafa Mohamed Ezzat Hamza A Mazen, MD

Dr. Mazen practices at Endoscopy Center of St. Louis in Saint Louis, Missouri.

Dr. Mazen's NPI, 1497284731, was assigned on June 9, 2017. Dr. Mazen holds New York license 296424.

Dr. Mazen's primary practice is Endoscopy Center of St. Louis, at 12990 Manchester Rd, Saint Louis, MO 63131 in Saint Louis County. The practice phone is (314) 984-0550.

Dr. Mazen's primary practice is Endoscopy Center of St. Louis in Saint Louis, Missouri. Dr. Mazen is also affiliated with Beth Israel Deaconess Medical Center. The medical group on file is Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI also links Dr. Mazen 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. Mazen practices, 2 sites in all. Vendor and product names are available with a free account.

Ophthalmology is Dr. Mazen's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Mazen's licenses on file in 3 states: New York, Maine and Missouri.

CMS data shows 695 Medicare services from Dr. Mazen across 13 procedure codes in 2024, for 241 Medicare patients. Medicare paid $53,930 for them.

CMS counts 241 Medicare patients who saw Dr. Mazen in 2024. The largest group is 65 to 74, with 92 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Mazen's median patient age at 73, with 58% women.

In 2024, Dr. Mazen wrote 1,413 Medicare Part D claims for 376 patients. 60% of them were for generic drugs. CMS names the drug for 1,263 of them, across 17 drugs with 11 or more claims each, at $96,911 in total drug cost. In 2023, CMS named 1,241 claims across 16 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Mazen for performance year 2024, reported as part of a group. Dr. Mazen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 70 procedures of cataract surgery by Dr. Mazen, more than 69% of the clinicians it reports for that procedure.

CMS Open Payments shows 33 general payments to Dr. Mazen from 9 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 67% of the total. Abbvie Inc. paid the most, $1,193.