"Dr. Krahn did my rny with the ring 1/5/16 and I couldn't be happier, I've already lost 103lbs since my surgery with another 50 to go. I had a couple minor issues after surgery and I loved that I could always get a hold of Dr. Krahn even after hours. His bedside manner is great and you can tell he really wants the best for his patients. The staff he has is great too they will help you in any way they possibly can, I couldn't have hoped for a better Dr and staff to have my surgery with. "