Gary Rivlin (1 February 2016). "He's One of the Nation's Highest-Paid CEOs—and You've Never Heard of Him". Thedailybeast.com. Retrieved 2016-07-31.
On December 17, 2017, CBS's 60 Minutes implied that Hammergren's negligence allowed the opiate epidemic to kill thousands of Americans, documenting repeated failure of McKesson to monitor and report suspiciously large orders of opiates by small pharmacies in rural locations.
