Diplomat Pharmacy Inc. named Brian Griffin CEO and chairman of the board, effective June 4.

CFO Atul Kavthekar will remain interim CEO until Griffin's appointment becomes effective.

Griffin's addition as chairman will increase the company's board size to eight members.

Griffin was most recently the executive vice president and CEO of IngenioRx, the pharmacy benefit manager of Anthem Inc. Prior to heading IngenioRx, he was the executive vice president and president of Anthem's commercial and specialty business unit.

Flint, Mich.-based Diplomat Pharmacy provides specialty pharmacy services.