Catalyst Medical Group, PLLC Lewiston Orthopaedic Associates and Valley Medical Center Divisions Share: Medical and Dental Catalyst Medical Group, PLLC Lewiston Orthopaedic Associates and Valley Medical Center Divisions Visit Website 2315 8th Street Lewiston, ID 83501 (208) 746-1383 ext 6200 (208) 298-4521 (fax) About About Multi-specialty group practice. Our care staff consists of health care physicians and professionals in over fifteen fields. Another way we are ''Building Better Health Care.''