Home Locations Tri-State Obstetrics and Gynecology, Inc. – Beaver Tri-State Obstetrics and Gynecology, Inc. – Beaver Tri-State Obstetrics and Gynecology, Inc. – Beaver 1000 Dutch Ridge Road, Floor 0 Beaver, PA 15009 Christopher Palombo, MD Patricia Vigder, DO Paula Youngdahl, MD Practice Information