Police said they arrested 58-year-old David Waltz on Monday on an active warrant.
Waltz is charged with 15 counts of invasion of privacy, a Class D offense.
Police say those charges involve 12 victims from Northen Light Eastern Maine Medical Center.
They allege Waltz used a hidden camera to spy on the victims in a restroom.
Waltz posted bail and is set to be arraigned on Nov. 14 in Bangor.