St. Mary's Surgical Associates
GENERAL SURGERY · ONCOLOGIC SURGERY · THORACIC SURGERY
OTOLARYNGOLOGIC SURGERY
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Welcome
The team at St. Mary's Surgical Associates has a tradition of excellence in clinical care that has earned them a reputation as medical leaders in our community. Their expertise is in combining life -saving medical technologies and surgeries with compassionate and individualized care. They are knowledgeable and experienced in a diverse array of procedures, including breast, thyroid, andthoracic surgery, surgical oncology, advanced laparoscopic procedures, and diagnostic endoscopy. Together, they performed nearly 640 surgeries last year. Open Monday through Friday. Please call 207-782-5424 to schedule an appointment or consultation with Dr. Clark, Dr. Ikossis, or Dr. Osborne or 207-777-8635 with Dr. Penner, or click here to fill out an online physician appointment request.
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Our Specialists
99 Campus Avenue, Suite 303
Lewiston, ME 04240
207-782-5424
Fax: 207-782-1226

Justin Clark, DO
Chief Surgeon
General Surgeon![]()
Clinical Instructor
Maria Ikossi, MD, PhD, FACS
General, Oncologic, and Thoracic Surgeon![]()
Clinical Instructor
Eric Osborne, DO
General Surgeon![]()
Clinical Instructor
Gregory L. Penner, MD
Otolaryngology (ENT) Surgeon






