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SCRANTON, Pa. – A trusted provider of primary care in Scranton will join Geisinger in the new year. Effective Monday, Jan. 15, 2024, the practice of Michael Gilhooley, M.D., will become Geisinger Primary Care Scranton. 

The clinic will remain at its location at 821 Oak St., Suite 1, where patients will be able to continue seeing the practitioners they know and rely on, and will keep the same phone number: 570-703-0539.

A Scranton native and board-certified internal medicine physician, Dr. Gilhooley has served Lackawanna County for nearly 30 years and has held clinical and academic leadership positions at several of the area’s institutions of medicine and learning. His partner, Marisa Siekierka, PA-C, has 20 years of experience evaluating, educating and treating patients and performing minor in-clinic procedures. 

Together, they specialize in prevention, diagnosis and treatment of diseases that affect adults and management of health conditions that range from simple to complex, chronic or acute. Dr. Gilhooley has a clinical interest in geriatric medicine, and he is experienced in working collaboratively with skilled nursing facilities to best care for his patients.

After attending The University of Scranton for his undergraduate education, Dr. Gilhooley earned his medical degree at Temple University in Philadelphia. Returning home, he completed his residency training in the Scranton-Temple Residency Program, which is now part of The Wright Center for Graduate Medical Education. 

“Scranton is my childhood home and my community,” said Dr. Gilhooley. “I’m proud to have served my neighbors for many years, and I’m honored to continue caring for them with Geisinger, a nationally renowned health system with the same focus on caring, excellence and quality that we’ve always maintained at our family-friendly practice.”

To transition to Geisinger, the practice will close from Jan. 8 through 12, during which time patients can visit ConvenientCare Scranton at 3 W. Olive St. for any urgent needs. ConvenientCare Scranton is open weekdays from 9 a.m. to 7:15 p.m. and weekends from 8 a.m. to 6 p.m. Patients can save their spot online at


About Geisinger
Geisinger is among the nation’s leading providers of value-based care, serving 1.2 million people in urban and rural communities across Pennsylvania. Founded in 1915 by philanthropist Abigail Geisinger, the nonprofit system generates $10 billion in annual revenues across 126 care sites — including 10 hospital campuses — and Geisinger Health Plan, with more than half a million members in commercial and government plans. Geisinger College of Health Sciences educates more than 5,000 medical professionals annually and conducts more than 1,400 clinical research studies. With 26,000 employees, including 1,700 employed physicians, Geisinger is among Pennsylvania’s largest employers with an estimated economic impact of $15 billion to the state’s economy. On March 31, 2024, Geisinger became the first member of Risant Health, a new nonprofit charitable organization created to expand and accelerate value-based care across the country. Learn more at or follow on Facebook, Instagram, LinkedIn and X.

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