Jonathan Gefen, MD

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Practice Philosophy

I tailor every operation to the patient. For example, each method of hernia repair has distinct advantages. I listen to patients, pay attention to what is important to them, and together we determine the best approach.

Practice Name
  • Main Line Surgeons
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This doctor is employed by Main Line HealthCare, the multispecialty physician network of Main Line Health, including more than 350 community and hospital-based physicians.

Locations and Appointments

Lankenau Medical Science Building
100 East Lancaster Avenue, Suite 275
Wynnewood, PA 19096
  • Phone: 610.642.1908
  • Fax: 610.642.6808
  • Accessibility: Public Transportation, Handicap Access

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About Jonathan Gefen, MD

I am a surgeon with broad expertise in the field of general surgery and advanced training in minimally invasive surgical techniques. I am committed to providing surgical care that is carefully matched to a patient’s needs and situation.

Much of my clinical practice is dedicated to treating patients suffering from pain or other complications of hernias. I repair all types of hernias, tailoring operations to the approach that is best for each patient—whether open, laparoscopic or robotic-assisted. As a general surgeon, I also provide surgical treatment of a wide range of medical conditions.

Clinical expertise

  • Surgical repair of all types of hernias, including hernias of the groin, abdominal wall, and diaphragm
  • Surgical removal of the gallbladder to treat gallstones and their complications
  • Surgical removal of all or part of the spleen when indicated to treat various disorders
  • Surgical treatment of adrenal gland tumors
  • Surgical treatment of gastric reflux disease (GERD)
  • Open, laparoscopic, and robotic-assisted surgical procedures tailored to each patient

I believe it is important for patients to understand their medical condition and why surgery is recommended. I take time to explain a patient’s diagnosis and surgical options, as well as what to expect after an operation.

A signature feature of my surgical approach is exquisite care in closing incisions. This makes a significant difference in the degree of post surgical scarring and improves the appearance of the skin after surgery.

In addition to my clinical practice, I have a strong commitment to surgical education and am actively involved in training and mentoring future surgeons. I served as associate program director of Lankenau’s general surgery residency program for eight years before advancing to the role of acting program director in 2017.

I am an active member of the American Hernia Society and publish research in the field of hernia repair.

  • Gender: Male
  • Language: English
Specialties Accepting New Patients
General Surgery Board certified since 2004
Primary Affiliation
Primary Conditions
Clinical Titles
  • Associate Program Director, General Surgery Residency Program, Lankenau Medical Center


Medical school
  • Jefferson Medical College
  • Jefferson Medical College
  • St. Luke's-Roosevelt Hospital
  • St. Luke's-Roosevelt Hospital
  • Long Island Jewish Medical Center
  • Long Island Jewish Medical Center

*Members of the Main Line Health medical staff are affiliated with Bryn Mawr Hospital, Lankenau Medical Center, Paoli Hospital and Riddle Hospital. Membership on the medical staff of any of our hospitals does not constitute an employment or agency relationship.

Awards & Memberships

Current Membership & Activities
  • American College of Surgeons
  • Association for Surgical Education
  • American Hernia Society