Arthur O'Connell
Intern (uncredited)
Lew Ayres
Dr. James Kildare
Emma Dunn
Mrs. Martha Kildare
Lionel Barrymore
Dr. Leonard Gillespie
Samuel S. Hinds
Dr. Stephen Kildare
Claire McDowell
Nurse for Mr. Winslow (uncredited)
Gene Lockhart
George Winslow
Frank Orth
Mike Ryan (uncredited)
Alma Kruger
Molly Byrd
Nat Pendleton
Joe Wayman
Henry Wadsworth
Collins
Walter Kingsford
Dr. Walter Carew
Nell Craig
Nurse Parker
George Chandler
Parkersville Counterman (uncredited)
Eddie Acuff
Clifford Genet - an Orderly (uncredited)
Laraine Day
Nurse Mary Lamont
Horace McMahon
Foghorn Murphy (uncredited)
Arthur Aylesworth
Mr. Cobb - a Farmer (uncredited)
Charles Trowbridge
Atkinson
Archie Twitchell
Bates
Milton Parsons
Parkersville Crazy Man (uncredited)
Jane Drummond
Nurse Probationer (uncredited)
Ralph Dunn
Motorcycle Cop (uncredited)
Marie Blake
Sally
John Shelton
Dr. Davidson
Barbara Bedford
Carew's Secretary (uncredited)
Ken Christy
Dickson - City Council Member (uncredited)
Jack Carr
Dr. Marsh (uncredited)
Erville Alderson
Boylston - City Council Member (uncredited)
Ferris Taylor
Dr. Coldridge (uncredited)
Ruth Robinson
Mother of Baby (uncredited)
Mary Cecil
Mrs. Deering (uncredited)
Leona Maricle
Mrs. Brownlee
Donald Briggs
Mr. Brownlee
Cliff Danielson
Dr. Jordan
Bob Ingersoll
Carpenter Adding Sign on Door (uncredited)
Kay Vallon
Nurse Shaw (uncredited)