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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 committed to making better health easier for the more than 1 million people it serves. Founded more than 100 years ago by Abigail Geisinger, the system now includes 10 hospital campuses, a health plan with more than half a million members, a research institute and the Geisinger College of Health Sciences, which includes schools of medicine, nursing and graduate education. With more than 25,000 employees and 1,700+ employed physicians, Geisinger boosts its hometown economies in Pennsylvania by billions of dollars annually. Learn more at or connect with us on Facebook, Instagram, LinkedIn and Twitter.

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R. Matthew Mattei
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