Ruben Marcado
Donoharm ruben
A headshot of Ruben


Ruben Marcado




Clinical pharmacologist

Relationship status


Portrayed by

Lin Manuel Miranda

Dr. Ruben Marcado is a character on Do No Harm. He is a clinical pharmacologist who helps suppress Dr. Jason Cole's alter ego Ian Price.

He is shown to be an awfully good friend throughout the series, helping Dr. Jason Cole out throughout the duration of the 11 episodes that he is seen in despite getting nothing in return. Jason truly did not deserve Ruben, he's too nice for his own good.

In fact, Ruben being such a great man lead to his demise in the episode "Im Allergic to Cats" when he leaves on a flight to Jamacia with Ian following him. It is hinted in both the end of that episode as well as episodes 12 and 13 that he never retrieved his bags, and that Ian was somehow involved in his disappearance.