Katherine A. Mahar

Katherine Mahar practices at Roswell Park Cancer Institute in Los Angeles, California.

Katherine Mahar's NPI, 1588210827, was assigned on August 13, 2019. Katherine Mahar holds New York license 023850.

Katherine Mahar's primary practice is Roswell Park Cancer Institute, at 344 S Hauser Blvd, Los Angeles, CA 90036 in Los Angeles County. The practice phone is (716) 845-2300.

Katherine Mahar's primary practice is Roswell Park Cancer Institute in Los Angeles, California. Katherine Mahar is also affiliated with Roswell Park Comprehensive Cancer Center. The medical group on file is Roswell Park Comprehensive Cancer Center.

Dmand AI tracks the electronic health record (EHR) system at each site where Katherine Mahar practices. Vendor and product names are available with a free account.

Physician assistant is Katherine Mahar's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Katherine Mahar is licensed in New York.

Dmand AI lists tobacco use among the conditions Katherine Mahar treats.

CMS data shows 289 Medicare services from Katherine Mahar across 3 procedure codes in 2024, all of them office visits, for 161 Medicare patients. Medicare paid $17,749 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 161 Medicare patients who saw Katherine Mahar in 2024. The largest group is 65 to 74, with 86 patients. 73% of them have high cholesterol, and 71% have high blood pressure. 25% are also on Medicaid. Their average risk score is 2.10, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Katherine Mahar's median patient age at 69, with 99% women.

In 2024, Katherine Mahar wrote 630 Medicare Part D claims for 206 patients. 82% of them were for generic drugs. CMS names the drug for 459 of them, across 18 drugs with 11 or more claims each, at $221,476 in total drug cost.

Katherine Mahar accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 4 general payments to Katherine Mahar from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $244.