All 109 actors in both Chicago Med and ER
109 actors have appeared in both Chicago Med and ER, across 552 episodes. The most-credited is CCH Pounder, Dr. Eleanor Hess in Chicago Med and Dr. Angela Hicks in ER.
| Actor | In Chicago Med | In ER | Eps | Eps |
|---|---|---|---|---|
| CCH Pounder | Dr. Eleanor Hess | Dr. Angela Hicks | 1 | 24 |
| Eddie Jemison | Dr. Stanley Stohl | Lysander Martin | 19 | 1 |
| David Eigenberg | Firefighter Christopher Herrmann | Detective Trent Mallory | 14 | 1 |
| Sharif Atkins | Joe Thomas | Dr. Michael Gallant | 1 | 12 |
| Christian Stolte | Lieutenant Randy "Mouch" McHolland | Driver | 5 | 1 |
| Gregg Henry | Dr. David Downey | Officer Mark Downey | 8 | 1 |
| Michael Rady | Dr. Matt Cooper | Brian Moretti | 11 | 2 |
| Paula Newsome | Caroline "Cece" Charles | Rehab Receptionist Margaret | 12 | 1 |
| Reiko Aylesworth | Emily Matthews | Chaplain Julia Dupree | 1 | 7 |
| Beth Lacke | Dr. Margo Collins, Ms. Lake | Cheryl | 9 | 1 |
| Erica Gimpel | Lydia Singleton | Adele Newman | 1 | 19 |
| Julie Berman | Dr. Samantha Zanetti | Jessamyn Chadsey | 8 | 1 |
| Carlos Gómez | James Young | Paramedic Raul Melendez | 1 | 6 |
| Eamonn Walker | Battalion Chief Wallace Boden | Dr. Stephen Dakarai | 4 | 3 |
| Merrin Dungey | Dr. Jennifer Kingston | Daphina | 6 | 1 |
| James Vincent Meredith | Barry Vaughn | Speaker | 8 | 1 |
| Scott Michael Campbell | Gavin Harley | EMT Reilly Brown | 1 | 7 |
| Amy Morton | Desk Sergeant Trudy Platt | Mrs. Walters | 5 | 1 |
| Coburn Goss | Everett James, Edward Thompson | Stan Griswold | 4 | 1 |
| Julie Ariola | Ms. Holloway | Emily | 1 | 4 |
| Eva Kaminsky | Jenifer Baker | Mrs. Andrews | 4 | 1 |
| Meg Thalken | Eleanor Holt | Flight Nurse Dee McManus, Rottman | 2 | 7 |
| Dennis Cockrum | Ray Burke | Little League Player's Father | 4 | 1 |
| Raphael Sbarge | Murphy Costello | Mr. Kirkendall | 1 | 2 |
| Brigid Brannagh | Cynthia Parker | Jamie Hendricks | 1 | 1 |
| Corbin Bleu | Tommy | Little Boy | 1 | 1 |
| Evan Arnold | Leonard Schmidt | Barry Sadler | 1 | 1 |
| Francis Guinan | Jimmy Finnegan, Nathan Clay | Police Negotiator | 2 | 1 |
| Howard Hesseman | Clyde Glickman | Dr. James Broderick | 1 | 1 |
| Jessica Tuck | Janice Anderson | Dr. Hemmings | 1 | 1 |
| JoNell Kennedy | Sheryl Russell | Judy Munder | 1 | 1 |
| Raymond Cham Jr. | Jay Keene | Max | 1 | 2 |
| Janelle Snow | Dr. Audrey Lee | Doherty | 5 | 1 |
| Robert Gossett | Reggie Dixon | Dr. Everett Daniels | 1 | 2 |
| Anthony Irons | Alvin Booker | Rowdy Man #1 | 4 | 1 |
| Gino Montesinos | Leo Ochoa | Officer Nunez | 1 | 1 |
| Mandy June Turpin | Kathy Duncan | Viv Rafferty | 1 | 1 |
| Mike Pniewski | Mark Asher | Bailiff WIlson | 2 | 1 |
| Tom Choi | Martin Lieu | Zafares | 1 | 1 |
| Vanessa Martinez | Neela Desai | Tiffany James | 1 | 1 |
| Bruce Nozick | Fred Anderson | Craig Simon | 1 | 2 |
| Caroline Lagerfelt | Carol Donovan | Andrea | 1 | 1 |
| Deidrie Henry | Deb Morgan | Nichelle Richardson | 1 | 1 |
| Elden Henson | Lucas Charles | Fingerless Guy | 1 | 1 |
| Ilyssa Fradin | Dr. Kimberly Gillin, Kathleen Pierce | Lori | 3 | 1 |
| Juliette Jeffers | Annette Hill | Elena Flemming | 1 | 1 |
| Lynn Milgrim | Sylvia Rosenblatt | Ms. Crandell | 1 | 1 |
| Rene L. Moreno | Hector Campos | Ed | 1 | 1 |
| Eric Ladin | Wyett Dupere | Pvt. Thomas Perry | 2 | 1 |
| François Chau | Patrick Choi | Neuro Resident | 1 | 2 |
| Austin Tichenor | Darryl Johnson | Mr. Sumpter | 1 | 1 |
| Danielle Larracuente | Becca Eason | Lizzie | 1 | 1 |
| Drew Powell | Harris Shorr | Dennis Voltaire | 1 | 1 |
| Erica Hubbard | Dina Morris | Girl on El | 1 | 1 |
| Jamie Renee Smith | Larissa Taggart | Emily Perrault | 1 | 1 |
| Lily Mojekwu | Abena's Aunt | Voice #2 | 1 | 1 |
| Marla Gibbs | Ruth Williams | Cherise Barnes | 1 | 1 |
| Nancy Linehan Charles | Elinor Whipple | Glenda Walton | 1 | 1 |
| Rebecca Field | Susan Miller | Psych Woman | 1 | 1 |
| Rusty Schwimmer | Celeste Belkin | Grollman | 1 | 1 |
| Scott Lawrence | Spencer Cook | Children's Services Rep | 1 | 1 |
| Amy Pietz | Deborah Miller | Loren | 1 | 1 |
| Christie Lynn Smith | Lisa Kramer | Marina Grasso | 1 | 1 |
| Dayo Ade | Dorian Harwell | James Rollins | 1 | 1 |
| Jim Ortlieb | Dr. Richard Cohen | Cook | 1 | 1 |
| Lewis T. Powell | Frank Shelton | Workman | 1 | 1 |
| Michael J. Harney | Dr. Ron Unger | Mr. Stehly | 1 | 1 |
| Arnell Powell | John Phillips | Del | 1 | 1 |
| Cedric Young | Gary Taylor | Leon | 1 | 1 |
| Jeff Kober | Doug Green | Stuart | 1 | 1 |
| Kristolyn Lloyd | Alicia Palmer | Laura Banfield | 1 | 1 |
| Lily Knight | Heidi | Mary Cochran | 1 | 1 |
| Rachel Cerda | Candace Hedges | Mirsa | 1 | 1 |
| Romy Rosemont | Lydia Reed | Joanne Bairos | 1 | 1 |
| Shelley Robertson | Pamela Moore | Tanya Phillips | 1 | 1 |
| Audrey Francis | Margie Cavanaugh | Young Woman | 1 | 1 |
| Brady Smith | Lawrence Givens | Rod | 1 | 1 |
| Dan Martin | Paul Michaels | Lieutenant | 1 | 1 |
| Edwin EdVanzd | Lt. Greg Robinson | CJ | 1 | 1 |
| Kirsten Fitzgerald | Judge Claire Folger | Judy | 1 | 1 |
| Laura Gardner | Martha Kittle | Kennedy | 1 | 1 |
| Peggy Roeder | Frances Davies | Ruth Huggins | 1 | 1 |
| Roderick Peeples | Jim Kessler | The Butcher | 1 | 1 |
| Jacqueline Williams | Officer Becerra | Krieg, TSA Guard | 1 | 2 |
| Karl T. Wright | Seth Chapman | Dr. Norris | 1 | 1 |
| Rachel Shapiro | Allison Levine | Jennifer Compton-Stein | 1 | 2 |
| Rob Wood | Deputy Warner | Screwdriver Guy | 1 | 1 |
| Bertila Damas | Isabel Carmona | Dr. Debra Wexler | 1 | 1 |
| Dale Rivera | Agent Ramirez | Cabbie | 1 | 1 |
| Jonathan Mangum | Delmer Brendl | Med Student Ryan Bradford | 1 | 1 |
| Luis Cortes | Barista | Refugio | 2 | 1 |
| José Ramón Rosario | Alfonso Sexton | Driver | 1 | 1 |
| Kate Mulligan | Donna Woods | Riggs | 1 | 1 |
| Alma Washington | Clerk | Passenger | 1 | 1 |
| Bernard White | Dr. Woodward | Addict seeking Rapid Detox | 1 | 1 |
| Katherine Mitchell | Carlotta | Incident Commander | 1 | 1 |
| John Gawlik | Frank Sheraton | Officer Collins | 1 | 1 |
| Phil Ridarelli | Mr. Kellogg | Doorman | 1 | 1 |
| Cerall Duncan | Amy | Mrs. Price | 1 | 1 |
| Madrid St. Angelo | Carl | Driver | 1 | 1 |
| Mari Weiss | Dr. Alana Stano | Vicki | 1 | 1 |
| Candice Rose | Catherine Wilson | Firefighter MacPherson | 1 | 1 |
| James Chisem | Frederick MacNeal | Weisel | 1 | 1 |
| Kenn E. Head | John Blalock | Homeless Man | 1 | 1 |
| Joe Krowka | Richard Lentz | Grocer | 1 | 1 |
| Michael Rebresh | Walter Zaleski | Driver | 1 | 1 |
| Karimar Brown | Kathy Bennett | Nia | 1 | 1 |
| Jossie Thacker | Ruth Johnson | Formidable Woman | 1 | 1 |
| William Marquez | Damon Adams | Ramos | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.