Mark Mishek plans to retire in 2021 after a more than 12-year run as Hazelden Betty Ford Foundation's top executive.
Mishek will stay on as chief executive until his successor is hired, the alcohol and drug addiction treatment clinic said Wednesday in a news release.
"While I'm excited about the next chapter in my life, I'm equally excited about the future of Hazelden Betty Ford and know that our mission is more important than ever before," Mishek said in a prepared statement.
Mishek became president and CEO of the Hazelden Foundation, based in Center City, in 2008 and led the 2015 merger of Hazelden and Rancho Mirage, Calif.-based Betty Ford Center.
Today, the combined organization operates 17 sites. A spokesman said the search for Mishek's successor begins next week and a new CEO is expected to be hired in the first half of 2021.
During Mishek's tenure, the organization has more than doubled the number of patients it serves yearly as it has moved away from a self-pay model and gained in-network status from major health plans.
"Mark not only brought two storied institutions together and significantly expanded our presence, but he also made our lifesaving care accessible to millions more people," said Lester Munson, who chairs the Hazelden Betty Ford Foundation board of trustees.
Mishek is credited with redefining abstinence-based treatment and leading the effort to develop an innovative approach to opioid addiction in 2012 that combined medication and psychosocial therapy.