Skip to main content


General Surgery

General Surgery Associates provides exceptional general surgery services in Oswego Hospital's technologically advanced surgery center. Complementing this seven-suite surgery center is its caring and professional team of physicians, nurses, anesthesiologists and other clinical staff, who offer high quality care. General Surgery Associates offer experienced, caring surgeons who provide a complete range of general surgery services.

For your convenience, our general surgeons will see patients in three locations throughout Oswego County.

Seneca Hill Location
Howard Simon, MD
Jai Singh, MD
Duane Tull, MD
Monday - Friday
105 Co. Rte. 45A
Suite 100, Oswego

Central Square Location
Duane Tull, MD
3045 E. Ave., Central Square

Areas of Specialty Include:

  • Colonoscopy
  • Endoscopy
  • Gallbladder
  • Thyroid
  • Laparoscopic Surgery
    • appendectomy
    • colon
    • gallbladder
    • gastrointestinal
    • hernia


Jai Singh, MD

Dr. Singh earned his bachelor of medicine and surgery (MBBS) from Maulana Azad Medical College and his master's of surgery at Vardhman Mahavir Medical College, both are a part of the University in Delhi, India. Dr. Singh served as chief resident during his residency at the Westchester Medical Center/New York Medical College in Valhalla, NY.

Howard Simon, MD

Dr. Simon earned his medical degree from SUNY Health Science Center in Syracuse, as well as completed his surgical internship and residency there. His surgical trauma/critical care fellowship was completed at SUNY Health Science Center in Brooklyn.

Dr. Simon is board certified and also holds certification in surgical critical care. He will offer office visits also in suite 1300 of the Fulton Medical Office Building and will deliver care in Surgery Center at Oswego Hospital.

Duane Tull, MD

Dr. Tull has nearly 20 years of surgery experience and will be performing a range of services, including appendix, hernia, colon resections, and gall bladder surgeries, among others. Dr. Tull most recently served as chief of surgery at Geisinger Jersey Shore Hospital, Jersey Shore, Pennsylvania.

Dr. Tull earned his medical degree at Eastern Virginia Medical School. He completed his residency at the Christiana Care Health System. Headquartered in Wilmington, Delaware, Christiana Care is a not-for-profit teaching health system with more than 260 residents and fellows. The system is continually ranked by US News & World Report as a Best Hospital. In addition to providing surgical care, he served as a clinical assistant professor of surgery at Geisinger Commonwealth School of Medicine.

Find a Physician

Advanced search