Chillicothe's Adena Regional Medical Center has received the highest the hospital rating, five-star, in a rating given out by the Centers for Medicare and Medicaid services. Adena is among just 35 of Ohio’s 134 rated hospitals to receive a five-star rating. CMS looks at more than 50 measures that fall into five quality categories: mortality, safety of care, readmission, patient experience and timely and effective care. A hospital’s overall rating is calculated using only those measures for which data is available. Only 13% of hospitals nationally receive the five-star rating.