David K. Ellwanger

HealthSpring, Inc. provides healthcare and medicare service plans. The company was founded on January 24, 1995 and is headquartered in Nashville, TN.

BMJ Medical Management, Inc. is principally a physician practice management company that provides management services to physician practices that focus on musculoskeletal care, which involves the medical and surgical treatment of conditions relating to bones, muscles, joints and related connective tissues. The company's broad spectrum of musculoskeletal care offered by the physician practices ranges from acute procedures, such as spine or other complex surgeries, to the treatment of chronic conditions, such as arthritis and back pain. The management services provided by the Company include physician practice and network development, marketing, payor contracting and financial, administrative and clinical information management.