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.