Johnson City Medical Center And Holston Valley Medical Center Have Received A One-Star Ranking From The Centers For Medicare And Medicaid Services. Hospitals Are Ranked On A Scale Of One To Five Stars, With Five Stars Being The Highest Quality. Rankings Are Determined By A Number Of Qualities. The American Hospital Association Said CMS “Flawed Approach” To Star Ratings Provides An Inaccurate, Misleading Picture Of Hospital Quality.