Our Physicians

Our physicians are board-certified. What does that mean?

To attain board certification, physicians must meet high standards for education, training and clinical skills set by national boards in colon-rectal surgery and in general surgery. Not all physicians meet this standard of excellence. Board certification in general surgery is required before a doctor can become board-certified in colon-rectal surgery. Drs. Lapos, Sinnott, Rakhmanine and Park are board-certified in colon-rectal surgery.

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Linda L. Lapos, M.D.

Dr. Lapos is a graduate of Muhlenberg College and Temple University School of Medicine. She completed her residency in general surgery and her residency in colon-rectal surgery at Lehigh Valley Hospital.

Dr. Lapos is past president of the medical staff of Lehigh Valley Health Network. She has a special interest in colonoscopy and ano-rectal problems, and is experienced in transanal endoscopic microsurgery. She has been in practice since 1991.
Dr. Lapos is board-certified in colon-rectal surgery. She is a fellow of the American Society of Colon & Rectal Surgeons and of the American College of Surgeons.

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Robert J. Sinnott, D.O.

Dr. Sinnott is a graduate of Lycoming College and the Philadelphia College of Osteopathic Medicine. He completed his general surgery residency and his colon-rectal surgery residency at Lehigh Valley Hospital.

Specializing in minimally invasive robotic laparoscopic surgical techniques, he has been in practice since 1992. He has a special interest in sphincter-saving procedures that avoid permanent ostomy for rectal cancer. He also has a special interest in colonoscopy.
Dr. Sinnott is board-certified in colon-rectal surgery and in general surgery. He is a fellow of the American Society of Colon & Rectal Surgeons and of the American College of Surgeons. He is chief of the division of colon-rectal surgery at Lehigh Valley Health Network, and is program director of the network’s residency in colon-rectal surgery.

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Mikhail I. Rakhmanine, M.D.

Dr. Rakhmanine graduated from St. Petersburg Medical School in 1989. He completed his general surgery residency and a burn fellowship at Nassau County Medical Center, East Meadow, N.Y., and a fellowship in surgical critical care at North Shore University Hospital in Manhasset, N.Y. He completed his colon-rectal surgery residency at Lehigh Valley Hospital in Allentown, Pa.

Dr. Rakhmanine has a special interest in difficult colonoscopy, minimally invasive robotic laparoscopic colon and rectal surgery, nonsurgical treatment of hemorrhoids, treatment of fecal incontinence, and transanal endoscopic microsurgery. He began his colon-rectal practice in the Lehigh Valley in 2000.
Dr. Rakhmanine is board-certified in colon-rectal surgery, surgical critical care and general surgery. He is a fellow of the American Society of Colon & Rectal Surgeons and of the American College of Surgeons.

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John S. Park, M.D.

Dr. Park is a graduate of Cornell University and the University of Medicine and Dentistry of New Jersey. He completed his general surgery residency at Graduate Hospital, Philadelphia, and his colon-rectal surgery residency at the Robert Wood Johnson University Hospital in New Jersey.

Specializing in minimally invasive robotic laparoscopic surgical techniques, Dr. Park also has a special interest in inflammatory bowel disease, colon and rectal cancer, and colonoscopy. He began practice in colon-rectal surgery in 2001.
Dr. Park is board-certified in colon-rectal surgery and in general surgery. He is a fellow of the American Society of Colon & Rectal Surgeons and of the American College of Surgeons.

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Physician Assistant A.J. Peiffer

Mrs. Peiffer earned a bachelor’s degree in biology from Moravian College and a bachelor of science degree as a Physician Assistant from Rutgers University, University of Medicine and Dentistry of New Jersey. She is a board-certified and Pennsylvania state-licensed Physician Assistant, and has been in practice since 1991. She is a member of the American Academy of Physician Assistants and the Pennsylvania State Society of Physician Assistants.

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Giovanni Bonomo MD

Dr. Bonomo is a graduate of New York University with Honors and he completed his medical education at Stony Brook University School of Medicine. He completed his general surgery residency at Mount Sinai, Beth Israel in New York, and his colon-rectal surgery residency at Penn State Milton S Hershey Medical Center He is trained in the management or both benign and malignant colorectal pathology with expertise in minimally invasive surgery, robotic surgery, and anorectal procedures. He has particular interest in the surgical management of inflammatory bowel disease as well as trans-anal minimally invasive surgery. He joined the practice in September 2017.  Dr. Bonomo is board-certified in general surgery and board-eligible in colon and rectal surgery. He is a member of the American Society of Colon & Rectal Surgeons and or the American College of Surgeons.