 Sanford Health once again looking for a potential merger. The company announced plans to join Marshfield Clinic Wednesday. The two hospitals said their merger talks are only just beginning, but they're both hopeful. Both Marshfield and Sanford have tried to merge with other companies. Marshfield and talks to merge with Essentia Health last year, but that did fall through. Sanford has tried to merge with several other health care providers over the past five years as well.