Dr. James Kildare

Lew Ayres

Dr. Leonard Gillespie

Lionel Barrymore

Alice Raymond

Lynne Carver

Joe Wayman

Nat Pendleton

Barbara Chanler

Jo Ann Sayers

Dr. Stephen Kildare

Samuel S. Hinds

Mrs. Martha Kildare

Emma Dunn

Dr. P. Walter Carew

Walter Kingsford

John Hamilton

Truman Bradley

Mrs. Chanler

Nella Walker

Dr. Lane-Porteus

Monty Woolley

Mr. Robert Chanler

Pierre Watkin

Dr. Vickery (uncredited)

Phillip Terry

Dr. Collins

Donald Barry

Dr. Bates (uncredited)

Don Castle

Blue Swan Waiter (uncredited)

Murray Alper

Dr. Joiner (uncredited)

Roger Converse

Harry Cook (uncredited)

Granville Bates

Nurse (uncredited)

Barbara Bedford

Lodger

James Mason

Little Boy's Mother (uncredited)

Margaret Bert

Sally, the Switchboard Operator

Marie Blake

Boardinghouse Landlady

Virginia Brissac

Stuart Walden

Leonard Penn

Coronary Patient

John Butler

Conover (uncredited)

Clinton Rosemond

Maggie (uncredited)

Janice Chambers

Nurse Parker (uncredited)

Nell Craig

Stout Lady

Grace Hayle

President, Board of Directors (uncredited)

Frank Dae

Nurse

Bess Flowers

Detective Herman (uncredited)

Emmett Vogan

Head Nurse

Brenda Fowler

Intern (uncredited)

Jack Murphy

Bartender

Harrison Greene

Mary Lamont

Laraine Day

Intern (uncredited)

Cyril Ring

Dr. Harris (uncredited)

Howard Hickman

Charlie (uncredited)

Cy Kendall

Lodger Bringing Blanket (uncredited)

Mary MacLaren

Lodger Going for Ambulance (uncredited)

James Pier Mason

Clancy (uncredited)

Tom McGuire

Mike Ryan (uncredited)

Frank Orth

Intern (uncredited)

Gilbert Russell

Resident Doctor (uncredited)

Edwin Stanley

Little Boy (uncredited)

Bobs Watson

Ed (uncredited)

Jack Woody

Board Member (uncredited)

William Worthington