Zach Braff
John 'J.D.' Dorian (18 eps)
Donald Faison
Christopher Turk (18 eps)
John C. McGinley
Perry Cox (18 eps)
Sarah Chalke
Elliot Reid (18 eps)
Judy Reyes
Carla Espinosa (18 eps)
Ken Jenkins
Bob Kelso (18 eps)
Neil Flynn
Janitor (18 eps)
Robert Maschio
Todd (13 eps)
Sam Lloyd
Ted Buckland (10 eps)
Eliza Coupe
Dr. Denise Mahoney (10 eps)
Christa Miller
Jordan Sullivan (9 eps)
Betsy Beutler
Dr. Katie Collins (8 eps)
Sonal Shah
Dr. Sunny Day (6 eps)
Kit Pongetti
Lady (5 eps)
Todd Bosley
Howie (5 eps)
Taran Killam
Jimmy (4 eps)
Aziz Ansari
Ed (4 eps)
Kate Micucci
Stephanie Gooch (4 eps)
Lee Thompson Young
Derek (3 eps)
Courteney Cox
Dr. Maddox (3 eps)
Randall Keenan Winston
Leonard (3 eps)
Travis Schuldt
Keith (3 eps)
Aloma Wright
Laverne Roberts (2 eps)
Bill Lawrence
Justice of the Peace (2 eps)
Elizabeth Banks
Dr. Kim Briggs (2 eps)
Jack Grinnage
Marvell (2 eps)
Frank Encarnacao
Dr. Mickhead (2 eps)
Deonte Gordon
Shawn (2 eps)
Manley Henry
Snoop Dogg Attending (2 eps)
Stephanie D'Abruzzo
A.M. Muppet (Ex Ray) (voice) (2 eps)
Johnny Kastl
Doug Murphy (2 eps)
Cabot McMullen
Med School Professor (2 eps)
Bob Clendenin
Dr. Zeltzer (2 eps)
George Miserlis
Crispin (2 eps)
Philip McNiven
Roy (2 eps)
Paul F. Perry
Randall (2 eps)
Andrew Miller
Baby Jack (2 eps)
Scott Foley
Sean Kelly (1 eps)
Barry Williams
Barry Williams (1 eps)
Frank Novak
Pat Rosell (1 eps)
Tim DeKay
Mr. Hill (1 eps)
Tim Moore
Mr. Gold (1 eps)
Glynn Turman
George (1 eps)
Caroll Spinney
Oscar the Grouch (voice) (1 eps)
Anthony Russell
Mr. Lawton (1 eps)
Julia Campbell
Mrs. Fremont (1 eps)
Eric Jacobson
Grover (voice) (1 eps)
Michael Spiller
The Balloon Guy (1 eps)
Kevin Clash
Elmo (voice) (1 eps)
Eric Artell
Rodney (1 eps)
Aseem Batra
Josephine (1 eps)
James Ritz
Mr. Hicks (1 eps)
Marcus Folmar
Mr. Tillman (1 eps)
Jennifer Jostyn
Dr. Simmons (1 eps)
Annie Little
Christine (1 eps)
Scott Rinker
Mr. Halford (1 eps)
Cathleen Kaelyn
Mrs. Halford (1 eps)
Michael Potter
Patient (1 eps)
Dave Goryl
Mr. Fremont (1 eps)
Lak Rana
Intern (1 eps)
Bob Bencomo
Colonel Doctor (1 eps)
Lewis Dauber
Mr. Vaughn (1 eps)
Helen Geller
Mrs. Fishman (1 eps)
Marcy Minton
Nurse Barbara (1 eps)
Mary Passeri
Nurse Nelly (1 eps)
Blair Williamson
Craig (1 eps)
Marcia Ann Burrs
Peggy (1 eps)
Julie Pop
Lulu Tarasi (1 eps)
Amanda Thorp
Brianna Tarasi (1 eps)
Geoff Stevenson
Dr. Beardface (1 eps)
Scott Palmason
Dr. Kelso Intern (1 eps)
Daniel Saltos
Dr. Wen Intern (1 eps)
Phoebe Dorin
Mrs. Jensen (1 eps)
Adam Conger
Charles (1 eps)
Linda Tomassone
Paige (1 eps)
Mark Ankeny
Mr. Swick (1 eps)
Debra Fordham
Dr. Fordham (1 eps)
Jean St. James
Mrs. Powell (1 eps)
Sara Van Horn
Mrs. Emmett (1 eps)
Corena Chase
Robyn (1 eps)
Mike Schwartz
Lloyd (1 eps)
Clark DeVol
Red Headed Kid (1 eps)
Arleen Grace
Woman (1 eps)
Shalina Waterman
Mermaid (1 eps)
Korbi Ghosh
Nurse Korbi (1 eps)
Arielle Byron
Barista (1 eps)
Nancy Daly
Mrs. Gallin (1 eps)
Judy Jean Berns
Mrs. Stonewater (1 eps)
John Kahle
Ethan (1 eps)
Josh Cooke
Dan (1 eps)
Elizabeth Bogush
Alex Hanson (1 eps)
Charles Rahi Chun
Dr. Wen (1 eps)
Tom Cavanagh
Dan Dorian (1 eps)
Shaughn Buchholz
Cabbage (1 eps)
Colin Hay
Colin Hay (1 eps)
Phill Lewis
Hooch (1 eps)
Kathryn Joosten
Mrs. Tanner (1 eps)
Amy Smart
Jamie Moyer (1 eps)
Jay Kenneth Johnson
Dr. Matthews (1 eps)
Joe Rose
Troy (1 eps)
Michael Learned
Mrs. Wilk (1 eps)
Nicole Sullivan
Jill Tracy (1 eps)
Martin Klebba
Randall (1 eps)
Michael McDonald
Mike Davis (1 eps)
Tyler Poelle
Boon (1 eps)
Katie O'Rourke
Coffee Nurse (1 eps)
Jill Tracy
Elaine (1 eps)
Michael Hobert
Lonnie (1 eps)
Meredith Roberts Quill
Kathy (1 eps)
Christina Miles
Gloria (1 eps)
Bob Rumnock
Patient (1 eps)
Lindsay Ravage
Slagathor (1 eps)
Bellamy Young
Dr. Miller (1 eps)
Matt Winston
Jeffrey Steadman (1 eps)
Hannah Storm
Self (uncredited) (1 eps)