SIHO Insurance Services, headquartered in Columbus, Indiana, was established in 1987 through the cooperative efforts of local physicians, hospitals, and employers who were concerned about the rising cost of health care. SIHO was formed with a vision to provide affordable health care benefits by partnering with local medical providers and employers. One of the fastest growing Health Plan Administrators in the Midwest, SIHO strives to raise the standard of health care and the quality of life in its communities.