NASHVILLE & MARSHFIELD, Wis. --(BUSINESS WIRE)--naviHealth and Security Health Plan of Wisconsin, Inc., today announced a multi-year extension of their collaboration in managing post-acute care services for Security Health Plan’s Medicare Advantage and commercial members. The agreement, initially signed in March 2014, will continue to leverage naviHealth’s decision-support technology and field-based clinicians to deliver high-touch care management services to Security Health Plan members receiv