POCATELLO, Idaho (KIFI)– Several thousand southeast Idaho residents could lose in-network access to Portneuf Medical Center, along with their affiliates —Pocatello Health Services, PHS Ambulatory Services, and Portneuf Ambulatory Surgical Center — this June as contract negotiations with Regence BlueShield of Idaho fail to produce an agreement. The dispute centers on a disagreement over costs. Portneuf Medical Center is operated by Ardent Health,…