Blues eye major conversion to managed care.
D054598:Blue Cross Blue Shield Insurance Plans / Q000639:trends*; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D007350:Insurance, Hospitalization / Q000639:trends*; D007357:Insurance, Physician Services / Q000639:trends*; D010347:Patient Care Planning / Q000379:methods; D014481:United States