Suffering from baldness, he always wears a toupee, a secret only seen by Wanda and Poof (and bribed them not to tell or say anything)
He loves to Golf and is good at it, being under par. He will often finish playing his golf game before attending to a patient.
He is voiced by and based on the show's creator and producer, Butch Hartman. Although during his first appearance, he was voiced by Jim Ward.
In the Swedish dub, his name is Doktor Karl Hingstlund. In the Latin American Spanish dub (made in Miami, FL), he's named "Doctor Ted Mata" only in The Gland Plan.
Oddly when he puts his glasses on he has pupils but when he takes them off he has purple eyes, this stopped when Poof came.
He doesn't pay much attention to other people when he's doing hobbies.
He got smacked by an umbrella by Wanda because (when Poof had the chickenpox) he drags Wanda on a wild goose chase just to get a discount on the antidote and he put the antidote in a cup (and didn't do it before he came).
He became more supportive after Poof was born.
In the first five seasons, his eyes were blind. Starting with Hairicane, he now has blue eyes.
He is one of the characters that doesn't call Timmy by his name.
Dr. Rip Studwell has a few things in common with Wanda’s ex-boyfriend, Juandissimo. They have black hair, are extremely vain and are self-proclaimed ladies men.