When an ASC’s controlled drug license is set to expire and requires renewal, the surgery center has options for the go-forward “registrant” designation. This also can be the case if the assigned registrant on the license—usually the ASC’s medical director—changes, since a change of that kind also prompts a re-registration. As an aside, whoever the current registrant is, the address that should be used is the location of the facility, not the one used for the registrant’s personal, licensed office practice.