List of supporting characters in ER - wikipedia List of supporting characters in ER This is a list of supporting fictional characters in the medical drama ER. Contents 1 Desk clerks and other non-medical hospital staff 2 Family members and friends 3 Fire fighters, paramedics, police officers, and social workers 4 Notable patients 5 Others 6 Secondary doctors and medical students 7 Secondary nurses and other medical staff 8 References 9 External links Desk clerks and other non-medical hospital staff Main article : List of desk clerks and other non-medical staff in ER This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Reiko Aylesworth Hospital Chaplain Julia Dupree 2007 -- 2008 Abraham Benrubi Desk Clerk Jerry Markovic 1994 -- 1999 ; 2002 -- 2006 ; 2008 -- 2009 Jesse Borrego Desk Clerk Javier 2007 -- 2008 Andrew Bowen Desk Clerk Temp Andrew `` Andy '' 1999 -- 2000 Akosua Busia Hospital cafeteria worker and wife of Mobalage Kobe `` Kubby '' Ekabo 1999 Jordan Calloway Volunteer K.J. Thibeaux 2005 -- 2006 Julie Delpy Runner for Central Supplies and Luka 's girlfriend Nicole 2001 Troy Evans Desk Clerk Frank Martin 2000 -- 2009 Małgorzata Gebel ER Aide / Desk Clerk ; Former Vascular Surgeon in Poland Bogdana `` Bob '' Liwecki 1994 -- 1995 Robert Gossett Hospital Board Member Dr Everett Daniels 2008 Mariska Hargitay Desk Clerk, also Mark Greene 's lover Cynthia Hooper 1997 -- 1998 Djimon Hounsou Custodian Mobalage Ekabo 1999 David Joyner Dialysis Technician 2004 -- 2006 Kristin Minter Desk Clerk Miranda `` Randi '' Fronczak 1995 -- 2003 Rolando Molina Desk Clerk Rolando 1995 -- 1996 Charles Noland Desk Clerk / Trainee Nurse E Ray Bozman 1995 -- 1997 Glenn Plummer Desk Clerk Timmy Rawlins 1994 -- 1995, 2006 -- 2007 Moira Price Surgical Night Clerk Liza 2005 Pamela Sinha Desk Clerk Amira 1999 -- 2001, 2003 -- 2005 Lisa Zane Risk Management Administrator & Doug Ross 's girlfriend Diane Leeds 1995 Family members and friends Main article : List of family members and friends in ER This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Khandi Alexander Sister to Peter Benton Jackie Robbins 1995 -- 2001 Bonnie Bartlett Mother of Mark Greene. Died early in Season 6. Ruth Greene 1997 -- 1998 Michael Beach Husband of Jeanie Boulet. Contracted HIV, unwittingly passed it on to Jeanie, died offscreen of AIDS in 2008. Al Boulet ( role played earlier by Bodison ) 1995 -- 1997 Wolfgang Bodison Husband of Jeanie Boulet Al Boulet ( role later played by Beach ) 1995 Julie Bowen Girlfriend of John Carter. In Season 5, Carter dated her but then contrived an excuse to break up with her. Roxanne Please 1998 -- 1999 Lisa Nicole Carson Girlfriend of Peter Benton. Claimed he was the father of her baby, later said he was n't ( which was true ) and tried to take Reese away from him but failed to. Later became erratic and vindictive before she died in an auto accident. Carla Reece 1996 -- 2001 Kieu Chinh Mother of Jing - Mei Chen Lin Chen 2003 George Kee Cheung Father of Jing - Mei Chen ( later played by Henry O ) Mr. Chen. Suffered permanently debilitating injuries in a car crash in China that killed his wife. Later euthanized by Jing - Mei. 2003 -- 2004 John Cullum Father of Mark Greene, a military veteran who finally reconciled with his son before dying late in Season 6. David Greene 1997 -- 2000 Steven Culp Boyfriend of Elizabeth Corday Dave Spencer Oliver Davis Son of Samantha Taggart Alex Taggart ( later played by Dominic Janes ) 2003 -- 2005 Rebecca De Mornay Carter 's cousin 's ex-wife Elaine Nichols 1999 Garret Dillahunt Ex-husband of Samantha Taggart ( Earlier played by Cole Hauser ) Steve Curtis 2005 -- 2006 Paul Dooley Father of Susan Lewis, proved to be a much better parent than his asshole wife. Henry Lewis 1995 -- 1996 ; 2004 James Farentino Father of Doug Ross Ray Ross. A charming man with issues not unlike the son he was never a father to. Died in a car accident in 1997. Sally Field Mother of Abby Lockhart Maggie Wyczenski 2000 -- 2006 Frances Fisher Mother of Kerry Weaver Helen Kingsley. A born - again Christian who gave Kerry up for adoption after giving birth as a teenager. Could not accept Kerry 's homosexuality, leading Kerry to not pursue any further contact with her. 2005 Paul Freeman Father of Elizabeth Corday Dr Charles Corday 1998, 2001 -- 2002 Danny Glover Father of Greg Pratt Charlie Pratt. Greg 's long - lost father, who Greg located and tried to forgive for abandoning him, but ultimately could n't do so. 2005 Rose Gregorio Mother of Carol Hathaway, who initially hated Doug and constantly undermined and fought with her daughter, but later was a good and loved parent. Helen Hathaway 1996 -- 1999 Michael Gross Father of John Carter. Ineffectual man whom his son loved but did n't respect. John `` Jack '' Carter Jr. 2001 -- 2004 Vondie Curtis - Hall Husband of Carla Reece ( Earlier played by Victor Williams ) Roger McGrath 2001 Estelle Harris Mother of Jerry Markovic Mrs. Markovic 2006 Christine Harnos Mark Greene 's wife, then ex-wife Jennifer `` Jenn '' Greene - Simon. Constantly bemoaned Mark 's low - paying, high stress ER career and his refusal to take lucrative jobs elsewhere. Eventually left him, filed for divorce, and married someone else. Not much of a mother to Rachel, disappeared for good after Mark died. 1994 -- 1996, 1996 -- 1998, 2001 -- 2002 Cole Hauser Ex-husband of Samantha Taggart Steve Curtis Rebecca Jane Hazlewood Cousin of Neela Rasgotra Jaspreet 2008 Marg Helgenberger Doug Ross 's girlfriend & his father 's boss Karen Hines Hallee Hirsh Daughter of Mark Greene ( Earlier played by Yvonne Zima ) Rachel Greene 2001 -- 2002 ; 2004 ; 2009 Ernie Hudson Father of Michael Gallant Colonel James Gallant 2006 Michelle Hurd Girlfriend of Kerri Weaver Courtney Brown 2006 -- 2007 Dominic Janes Son of Samantha Taggart Alex Taggart 2005 -- 2009 Stacy Keach Father of Tony Gates Mike Gates 2007 Chloe Greenfield Adoptive daughter of Tony Gates Sarah Riley 2006 -- 2009 Anupam Kher Father of Neela Rasgotra Ajay Rasgotra Kiron Kher Mother of Neela Rasgotra Mrs. Rasgotra Nancy Kwan Mother of Jing - Mei Chen Lin Chen 2000 Piper Laurie Mother of Doug Ross Sarah Ross 1995 -- 1996 Amy Madigan Mother of Samantha Taggart Mary Taggart 2009 Rosalee Mayeux Mother of Ray Barnett Jacy Barnett 2007 Mary McDonnell Mother of John Carter Eleanor Carter ( née Ferguson ) 2001 Andrew McFarlane Nephew of Peter Benton Jesse Robbins 2000 Trevor Morgan Son of Donald Anspaugh Scott Anspaugh 1998 Thandie Newton Girlfriend and later wife of John Carter Makemba `` Kem '' Likasu - Carter. Met John on a medical relief mission in the Congo. Fell in love with him and planned to be with him in Chicago, but their relationship never recovered after their son died in utero. 2003 -- 2005 ; 2009 Bruce Nozick 2nd husband of Jennifer `` Jenn '' Greene - Simon Craig Simon 1995 -- 1996 Judy Parfitt Mother of Elizabeth Corday Isabelle Corday 2000 -- 2002 Andrea Parker Girlfriend of Doug Ross Linda Farrell 1994 -- 1995 Valerie Perrine Mother of Susan Lewis Cookie Lewis. A selfish, self - centered woman who constantly enabled Chloe and disappointed Susan. 1995 Zoran Radanovich Brother of Luka Kovač Niko Kovač 2007 Sheryl Lee Ralph Mother of Michael Gallant Gloria Gallant 2006 Beah Richards Mother of Peter Benton Mae Benton 1994 -- 1995 Ving Rhames Brother - in - law to Peter Benton Walter Robbins 1994 -- 1996 Jonathan Scarfe Cousin of John Carter Chase Carter. Spoiled rotten young man who fell into heroin addiction and was left nearly vegetative after an overdose, but was last shown having improved greatly and being able to function in a limited manner. 1997 -- 1998, 2001 Tom Everett Scott Brother of Abby Lockhart Eric Wyczenski 2002 -- 2003 Lois Smith Grandmother of Samantha Taggart Gracie 2007 Frances Sternhagen Grandmother of John Carter Millicent `` Gamma '' Carter 1997 -- 2003 Marcello Thedford Brother of Greg Pratt Leon Pratt 2002 -- 2003 Mark Valley Ex-husband of Abby Lockhart Richard Lockhart 2000 -- 2003 Renée Victor Mother - in - law of Kerry Weaver Florina Lopez Gwynyth Walsh Mother of Lucy Knight Barbara Knight 2000 Fred Ward Father of Abby Lockhart Eddie Wyczenski 2006 -- 2007 Matthew Watkins Son of Peter Benton Reese Benton 1999 -- 2001 ; 2009 Kathleen Wilhoite Sister of Susan Lewis Chloe Lewis 1994 -- 1996 ; 2002 Victor Williams Husband of Carla Reece ( Later played by Vondie Curtis - Hall ) Roger McGrath 1998 -- 2001 Shannon Woodward Sister of Samantha Taggart Kelly Taggart 2009 Yvonne Zima Daughter of Mark Greene ( Later played by Hallee Hirsh ) Rachel Greene 1994 -- 2000 Actress uncredited Sister of Lucien Dubenko Victoria Dubenko 2006 Fire fighters, paramedics, police officers, and social workers This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Mädchen Amick Social Worker Wendall Meade 2004 -- 2005 Christopher Amitrano Police Officer Officer Hollis 2006 -- 2009 Michelle Bonilla Paramedic Christine Harms 1999 -- 2009 Scott Michael Campbell EMT Reilly Brown Claudine Claudio Paramedic Silva 2000 -- 2001 Brendan Patrick Connor Paramedic Reidy 2006 -- 2008 Elliot Durant III Paramedic Anders 2004, 2009 George Eads Paramedic Greg Powell 1997 -- 1998 Ron Eldard Paramedic. Carol 's boyfriend in Season 2, before they broke up because the tragic death of his partner led to Shep becoming violent and scary and he refused to get help or deal with it. Ray `` Shep '' Shepard 1995 -- 1996 Julie Ann Emery Paramedic Nikki 2001 -- 2003 Mike Genovese Police Officer Al Grabarsky 1995 -- 1996, 1998 -- 2000 Erica Gimpel Social Services Liaison Adele Newman 1997 -- 2003 Carlos Gómez Paramedic Raul Melendez 1995 -- 1996 Lynn A. Henderson Paramedic Pamela Olbes 1995 -- 2009 Tara Karsian Social Worker Liz Dade 2005 -- 2006, 2007, 2008 -- 2009 Daniel Dae Kim Social Worker Ken Sung 2003 -- 2004 Ed Lauter Fire Captain Dannaker 1998 -- 2002 Brian Lester Paramedic Brian Dumar 1996 -- 2009 Louie Liberti Paramedic Tony Bardelli 2003 -- 2009 Joe Manganiello Police Officer Officer Litchman 2007 Chad McKnight Police Officer Officer Wilson 1995, 1996, 1999 -- 2000, 2001 -- 2004, 2006 Michele Morgan Paramedic and Dr. Corday 's patient Allison Beaumont 1997 -- 1998 Demetrius Navarro Paramedic Morales 1998 -- 2009 Bobby Nish Police officer Danny Yau 2005 -- 2006 Vyto Ruginis Paramedic Wright 2006 -- 2007 Monté Russell Paramedic Dwight Zadro 1995 -- 2009 Lisa Vidal Firefighter CFD Lt. Sandy Lopez 2001 -- 2004 Emily Wagner Paramedic Doris Pickman 1994 -- 2009 Cress Williams Police officer and boyfriend / husband of Jeanie Boulet Reggie Moore 1998 -- 2000 ; 2008 `` Faceman '' Lowe Paramedic Chris Lowe 1999 ? Notable patients This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Paul Benjamin Junk Dealer, Greene 's patient Al Irving 1994, 2002 Red Buttons Carter 's patient Jules ' Ruby ' Rubadoux. Carter benevolently but foolishly lied to him about his wife Sophie 's terminal condition, leading to Ruby refusing to listen to Carter, but 10 years later when Ruby returned to the ER he and Carter were able to mend fences somewhat. 1995, 2005 Rosemary Clooney Alzheimer 's disease patient Mary Cavanaugh a.k.a. `` Madam X '' 1994 James Cromwell Catholic Bishop and patient of Luka Kovač Bishop Stewart 2001 Kirsten Dunst Teen prostitute and Doug Ross 's patient Charlene `` Charlie '' Chiemienga 1996 -- 1997 Joanna Gleason Allergy patient, Infomercial Director, and briefly Mark Greene 's romance interest Iris Dan Hedaya Lawyer and patient Herb Spivak. Helped Mark fend off a civil lawsuit, later returned having lost all his money in a dot - com bust. 1997, 2005 Swoosie Kurtz Tele - evangelist and patient Tina Marie Chambliss 1998 David Krumholtz Schizophrenic patient who in a psychotic break stabbed both John Carter and Lucy Knight, the wounds leaving Carter injured and with life - long kidney problems and eventually resulted in Lucy 's death. Paul Sobricki 2000, 2002 Mary Mara Originally a prostitute ; later Secretary / Cancer patient Loretta Sweet 1995 -- 1996 Bob Newhart Architect who is gradually going blind ; patient of Dr. Lewis Ben Hollander 2003 Sam Vlahos Homeless man and frequent patient in ER Pablo 1997 -- 1998 ; 2000 -- 2003 James Woods ALS ( Lou Gehrig 's disease ) patient, Abby Lockheart 's teacher in medical school Dr. Nate Lennox 2006 Josh Radnor Alderman Bright 's lover who contracted Syphilis and was treated under the table by Kerry Weaver Keith. Because he was unaware of either Bright 's condition or his own allergies, he died after having a bad reaction to penicillin. 2003 Bruce Weitz Alderman for City of Chicago and patient of Kerry Weaver for Syphilis Alderman John Bright 2003 Others This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Susan Sarandon Grandmother of a boy who died in an accident. Gave Doug and Carol permission to harvest his kidney, which ended up being used for John Carter 's successful transplant. Nora 2009 Ray Liotta A dying patient gives an insight into the regrets he has about his wasted life, with Greg Pratt going from hostility towards him ( he reminds Pratt of his own, absentee father ) to compassion as he dies over the course of an hour. Charlie Metcalf Lucy Liu Mother of a little boy who has AIDS Mei - Sun Leow 1995 Jake Lloyd Son of the patient Loretta Sweet Jimmy Sweet Ewan McGregor Holds up a convenience store with hostages including Carol Hathaway Duncan Stewart 1997 Joe Torry Sues Mark Greene after his brother dies ; a suspect in Greene 's beating but is n't responsible. He and Mark have a heated conversation in which both men admit they 're not the reason for the other 's misery. Chris Law 1997 Bradley Whitford Husband of a pregnant patient in Mark Greene 's care Sean O'Brien 1995 James Belushi Father who was brought in after a car accident with his son Dan Harris 2001 Jared Padalecki Son who was brought in after a car accident with his father Paul Harris 2001 Shiri Appleby Season 1, Episode 1 - Teen with etopic pregnancy Secondary doctors and medical students Main article : List of secondary doctors in ER This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Alan Alda ER Attending Physician Dr. Gabriel Lawrence 1999 Sam Anderson Chief of Cardiology and member of the board. Incredibly acerbic and not friendly to the ER, but good at his job. Dr. Jack Kayson 1994 -- 2007 Perry Anzilotti Anesthesiologist Perry 1994, 1995 -- 2002, 2003, 2004, 2006, 2008 Shiri Appleby Intern Dr. Daria Wade 2008 -- 2009 Amy Aquino Chief of Obstetrics & Gynecology. Originally introduced as a shrieking harpy who clashed with the ER and refused to help anyone there, but evolved over time into a likable doctor who helped multiple ER regulars deal with pregnancies. Dr. Janet Coburn 1994 -- 2009 Danny Arroyo Medical student Reid Mooney 2001 John Aylward Chief of Staff ( 1996 -- 1999 ), General surgeon and member of the board ( 1999 -- 2006 ), Chief of Staff ( 2006 -- 2009 ) Dr. Donald Anspaugh 1996 -- 2009 Jillian Bach Medical Student Penny Nicholson 2004 -- 2006 Eion Bailey Medical Student Jake Scanlon 2004 -- 2005 Lourdes Benedicto Pediatrics Intern. Briefly dated Carter in Season 7. Rena Trujillo 2001 Leslie Bibb Medical Student, flirted with Kovac in Season 9 but was nearly killed in a car accident when he was driving. Erin Harkins 2002 -- 2003 Paul Blackthorne Invasive Radiologist, had a fling with Dr. Corday. Dr. Jeremy Lawson Alexis Bledel Intern who was a key figure in the series finale. Dr. Julia Wise 2009 Dennis Boutsikaris Surgeon Dr. David Kotlowitz 1999 Joseph Bua Special Education Student Boo Bradley 2001 David Brisbin Anesthesiologist who hated Dr. Corday and vice versa. Dr. Alexander Babcock 1998 -- 2002 Clancy Brown SPG Doctor and Kerry Weaver 's boyfriend Dr. Ellis West 1997 -- 1998 L. Scott Caldwell Director of Neo-Natology Dr. Megan Rabb 2004, 2006 Don Cheadle Medical Student. Turned from a successful business path after being diagnosed with Parkinson 's. Paul Nathan 2002 Megan Cole Pathologist Dr. Alice Upton 1996, 1998, 2000 -- 2001, 2003 Bruno Campos Vascular Surgeon Dr. Eddie Dorset 2003 Joel de la Fuente Medical student Ivan Fu 1997 John Doman Chief of Psychiatry Dr. Carl DeRaad 1999 -- 2000, 2001, 2003 Malaya Rivera Drew Medical Student Katy Alvaro 2006 -- 2007 Christine Elise Medical Student. Love Interest of Carter in Season 2. Temporarily estranged with Carter after she was drunk and slept with Ross accidentality. Later reconciled with Carter but broke up with him over his behavior when seeking surgical procedures. It was revealed that her med school tuition was sponsored by the US Air Force, so she had to join USAF and serve for 4 years after she graduated from medical school. Harper Tracy 1995 -- 1996 Omar Epps Surgical Intern who constantly suffered Dr. Peter Benton 's wrath although Dr. John Carter befriended him. Unfortunately, Benton 's constant bullying of Gant drove Gant over the edge so much so that Gant committed suicide by jumping in front of a train. Gant 's remains which were badly disfigured were later brought to County for treatment and when Gant was paged, Benton and Carter discovered to their horror that it was Gant that they were working on. Despite their best efforts, Gant eventually succumbed to his wounds and died, his death leaving Carter devastated and angry at himself and Benton for failing to see that there was something wrong with Gant. Dr. Dennis Gant 1996 -- 1997 Charles Esten Orthopedic Surgeon Dr. Barry Grossman 2007 -- 2008 Jorja Fox ER Intern, later resident Dr. Maggie Doyle 1996 -- 1999 Jami Gertz Psychiatrist Dr. Nina Pomerantz 1997 Sara Gilbert ER Intern, later resident Dr. Jane Figler 2004 -- 2008 Matthew Glave Surgeon. Arrogant even by surgical standards, Carter did n't like him and Peter found him to be a creep. Dr. Dale Edson 1996 -- 1999, 2001 -- 2002 Jeremy Glazer Medical Student David Christopher Grove Orthopeadic Surgeon Dr. Marty Kline 2002 -- 2003, 2006 Glenne Headly Pediatric Surgeon Dr. Abby Keaton 1996 -- 1997 Justin Henry Medical student James Sasser 1997 Glenn Howerton ER Resident Dr. Nick ' Coop ' Cooper 2003 Michael Ironside Chief of Surgery and ER Chief Dr. William ' Wild Willy ' Swift 1995, 1998, 2002 Marc Jablon Intern Dr. Larry Western 2007 -- 2008 Scott Jaeck Radiologist Dr. Steve Flint 1994 -- 1996, 1999 -- 2000, 2002 Julia Jones Intern ( Prev. Medical Student ) Dr. Kaya Montoya 2008 -- 2009 James LeGros Pediatrician and ex-boyfriend of Anna Del Amico Dr. Max Rocher 1998 John Leguizamo ER attending physician Dr. Victor Clemente 2005 -- 2006 Harry Lennix Infectious disease specialist and briefly boyfriend of Jeanie Boulet Dr. Greg Fischer 1997 Julia Ling Surgical Intern Mae Lee Park 2006 -- 2007 Chad Lowe Medical student, assigned to Dr. Carter in Season 4 but had no interest in doing anything ER related with his focus on medical research. Dr. George Henry 1997, 2005 William H. Macy Chief of Surgery and Head of the ER Dr. David Morgenstern 1994 -- 1998 ; 2009 J.P. Manoux Junior Surgical Attending, ( Formerly Chief Resident ) Dr. Dustin Crenshaw 2006 -- 2008 Kari Matchett Acting Chief Of Emergency Medicine Dr. Skye Wexler 2007 -- 2008 Mary McCormack Doctor in Africa Debbie 2003 -- 2006 Gil McKinney Intern Dr. Paul Grady 2007 -- 2009 Elizabeth Mitchell Psychiatrist who was in a relationship with Kerry Weaver for a short time before being forced out by Dr. Romano 's homophobia. Dr. Kim Legaspi 2000 -- 2001 Julian Morris Surgical Intern Dr. Andrew Wade 2008 -- 2009 Leland Orser Attending Trauma Surgeon ; Chief of Surgery. Dr. Corday did n't want him to be hired ( for reasons that were never clearly outlined ) and he took over her position after she resigned in disgrace. Dr. Lucien Dubenko 2004 -- 2009 Steven Christopher Parker Surgical Intern Dr. Harold Zelinsky 2007 -- 2008 Busy Philipps Medical Student. Devout Christian who inspired Archie Morris in various ways, and dated him for a little while. Hope Bobeck 2006 -- 2007 Giovannie Pico Medical Student Ludlow 2004 -- 2005 CCH Pounder Surgical Attending Dr. Angela Hicks 1994 -- 1997 Andy Powers ER intern Dr. Howard Ritzke Victor Rasuk Intern Dr. Ryan Sanchez 2008 -- 2009 Gina Ravera Radiologist Dr. Bettina DeJesus 2006 -- 2008 Ron Rifkin Senior Cardiovascular Surgeon. Genius and hospital rainmaker, but played with valid data on a key study and inspired action from Peter Benton. Dr. Carl Vucelich 1995 -- 1996 Emily Rose Intern Dr. Tracy Martin 2008 -- 2009 Rick Rossovich Orthopedic Surgeon Dr. John `` Tag '' Taglieri 1994 -- 1995 Dahlia Salem Surgical Chief Resident Dr. Jessica Albright 2005 -- 2006 Eddie Shin Medical student Stanley Mao 2001 Michael B. Silver Psychiatrist Dr. Paul Myers 1995, 1997 -- 2000, 2003, 2005, 2008 Britain Spellings ER intern Dr. Sackowitz 2005 Maury Sterling Psychiatrist Dr. Nelson 2004, 2006 Kim Strauss Anesthesiologist Ari 2005 -- 2007 Rossif Sutherland Medical student. In Season 10, was assigned to the ER ; the senior staff did n't think he was good there and he vanished without explanation. Lester Kertzenstein 2003 -- 2004 John Terry Psychiatrist and boyfriend of Susan Lewis Dr. David ' Div ' Cvetic 1994 Stanley Tucci Chief of Emergency Medicine Dr. Kevin Moretti 2007 -- 2008 Vince Vieluf Medical Student Bernard Gamely 1998 Bresha Webb Medical Student Laverne St. John 2008 -- 2009 Mare Winningham Chief of Emergency Services ; ER attending physician who had an unhealthy obsession with Dr. Mark Greene. She was later revealed to be an imposter who had impersonated many other people in various jobs over the last few years. Dr. Amanda Lee 1998 -- 1999 Secondary nurses and other medical staff Main article : List of secondary nurses in ER This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Actor / Actress Character Position Character Name Years of Appearance Conni Marie Brazelton ER Nurse Conni Oligario 1994 -- 2003 Laura Cerón ER Nurse Chuny Marquez 1995 -- 2009 Cynthia Cervini Nurse Anna Waldron 2002, 2004, 2005 Morris Chestnut ICU nurse & Deb 's baby 's father Frank ' Rambo ' Bacon 2000 Ellen Crawford ER Nurse Lydia Wright 1994 -- 2003, 2009 Deezer D ER Nurse Malik McGrath 1994 -- 2009 Yvette Freeman ER Nurse Haleh Adams 1994 -- 2009 Ren Hanami NICU Nurse 2006 Mary Heiss ER Nurse Mary 2000 -- 2008 April Lee Hernandez ER Nurse Inez 2005 -- 2006 Monica Guzman Surgical Nurse Marisol 2008 -- 2009 Penny Johnson Nurse Practitioner Lynette Evans 1998 -- 1999 Kristen Johnston Chief ER Nurse Eve Peyton 2005 Sam Jones III Emergency Medical Technician, Brother of Greg Pratt Charlie ' Chaz ' Pratt, Jr. 2005 -- 2009 Dinah Lenney Surgical Charge Nurse Shirley 1995 -- 2004, 2006 -- 2009 Pat Lentz Nursing Supervisor None 2005, 2008 Bellina Logan ICU, Pediatrics and Surgical Nurse Kit 1996 -- 2003 ; 2005 ; 2008 Donal Logue Flight Nurse and boyfriend / husband / ex-husband of Susan Lewis Chuck Martin 2003 -- 2005 Lily Mariye ER Nurse Lily Jarvik 1994 -- 2009 Vanessa Marquez ER Nurse Wendy Goldman 1994 -- 1997 Deborah May County Nursing Director Mary Cain 1996 -- 1997, 2002 Angel Laketa Moore ER Nurse Dawn Archer 2006 -- 2009 Jenny O'Hara ER Nurse Rhonda Sterling Kip Pardue ER Nurse Ben Parker 2006 -- 2007 Kyle Richards Nurse Dori 2000 -- 2006 Lucy Rodriguez Nurse Bjerke 1996 ; 2000 -- 2003 Nadia Shazana Nurse Jacy 2001 -- 2008 Meg Thalken Flight Nurse Dee McManus 1996, 1999 -- 2001, 2005, 2008 Gedde Watanabe ER Nurse Yoshi Takata 1997 -- 2003 References External links ER on IMDb ER Headquarters ER Characters Main John Carter Kerry Weaver Abby Lockhart Luka Kovač Mark Greene Peter Benton Robert Romano Elizabeth Corday Susan Lewis Greg Pratt Carol Hathaway Neela Rasgotra Samantha Taggart Jing - Mei Chen Archie Morris Doug Ross Jeanie Boulet Tony Gates Cleo Finch Dave Malucci Lucy Knight Anna Del Amico Catherine Banfield Supporting Doctors Nurses Non-medical staff Family members and friends Seasons 5 6 7 8 9 10 11 12 13 14 15 Episodes `` Love 's Labor Lost '' `` On the Beach '' `` The Show Must Go On '' `` Strange Bedfellows '' `` No Place to Hide '' `` There Are No Angels Here '' `` The Gallant Hero and the Tragic Victor '' `` Twenty - One Guns '' `` And in the End... '' Related Cast Awards and nominations Retrieved from `` https://en.wikipedia.org/w/index.php?title=List_of_supporting_characters_in_ER&oldid=851838667 '' Categories : ER ( TV series ) characters Lists of minor fictional characters Hidden categories : Dynamic lists Articles with hCards Talk Contents About Wikipedia Add links This page was last edited on 24 July 2018, at 23 : 02 ( UTC ). About Wikipedia

Question: who played mark greene's dad on er
Answer: John Cullum