Undercover Doctor is a 1939 American crime film directed by Louis King, written by William R. Lipman and Horace McCoy.

The film stars Lloyd Nolan, Janice Logan, J. Carrol Naish, Heather Angel, Broderick Crawford and Robert Wilcox.

[1][2] Dr. Bartley Morgan appears to be a highly respectable doctor and runs a profitable private practice with his nurse Margaret Hopkins.

Underneath his respectable veneer, he is engaged in a range of illegal activities.

FBI agent Robert Anders investigates Morgan.