Introduced as a surgical intern at the fictional Seattle Grace Hospital, Karev eventually obtained the position of resident, later becoming a pediatric surgeon.
Izzie Stevens is an attending surgical oncologist. She was a surgical resident at Seattle Grace Hospital until she was fired shortly after the merger with Mercy West Medical Center. Engaged to Denny Duquette until his death, she is now in a relationship with her ex-husband, Alex Karev.
O'Malley begins to display a talent for trauma surgery, and is told by the chief of trauma surgery Owen Hunt (Kevin McKidd) that it is definitely his specialty.
The other remotely important storyline of the night was that Meredith finally decided on her specialty — general surgery — after being prodded by Chief Hunt. “You ditched neuro,” he said.
The character's main storyline involves Jackson trying to achieve success on his own instead of riding on the coattails of his surgeon grandfather's high reputation. He specializes in plastic surgery after working with chief Mark Sloan (Eric Dane) in season 7, and later became chief of the department himself.
Her Strength in Neurosurgery
Since Lexie died before completing her residency, fans have speculated about what specialty she would have chosen as an attending. Many viewers agree that she would have continued a path of neurosurgery, following in the footsteps of Amelia and Derek Shepherd.
Katherine Heigl as Izzie Stevens
She eventually returned for a second and admitted she didn't feel like Seattle was her home anymore. Later, Alex got sent divorce papers, and now we know Izzie secretly had Alex's twins, lives on a ranch in Kansas, and became a surgical oncologist.
After breaking up with Owen, Cristina continues to excel at surgery and becomes de facto chief of cardio.
Derek Shepherd was a renowned neurosurgeon, former Head of Neurosurgery, and board director at Grey Sloan Memorial Hospital. He was married to Meredith Grey and they have two daughters, Zola and Ellis, and a son, Bailey. He died from his injuries after being hit by a truck.
According to the Grey's Anatomy fandom wiki, George O'Malley was Miranda Bailey's favorite. Bailey said George was her favorite of her interns. She also named her son after him.
Cristina Yang & Owen Hunt – After the shooting, Cristina and Owen decided to get married.
After speculation that Izzie would be killed off in the fifth season, the character was diagnosed with Stage 4 metastatic melanoma. She married Alex in the series' 100th episode, and afterwards, her tumor was successfully removed.
Alex reveals Izzie was single, wanted kids and because the cancer nuked her eggs, she could not have biological children but she had their embryos. Flashbacks from the fifth season show Alex and Izzie's scenes revolving around the embryos.
Bailey realizes that she has become somewhat bored with General Surgery and may need a change of specialty. She became drawn to Pediatric surgery after working on a number of pediatric cases and working closely with Arizona Robbins, a pediatric surgeon, who convinces her to apply for a pediatric fellowship.
Mark first appears in season two. He is a highly respected plastic surgeon, sub-specialized in otolaryngology and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey). In his first appearance, he flirts with Meredith Grey, and Derek punches him in the face.
Although initially focusing on neurosurgery during her residency due to her crush on Derek Shepherd, April Kepner finally settles on trauma surgery as a specialty. After failing her boards, April Kepner departs but returns as a surgical attending when Chief Owen Hunt offers her job back.
Andrew DeLuca decided to go to medical school after being an EMT and he was quickly a star resident at Grey-Sloan. He became an attending general surgeon, studying under Meredith Grey and Richard Webber (two of the most renowned surgeons in the hospital).
Addison is a world-class neonatal surgeon with board certifications in both Obstetrics and Gynaecology and Maternal and Fetal Medicine. Additionally, she has completed a medical genetics fellowship. She works at the Oceanside Wellness Group, a fictional practice located in Santa Monica, California.
Derek Shepherd, Addison Forbes Montgomery, Mark Sloan, Naomi Bennett, and Sam Bennett all attended Columbia University College of Physicians and Surgeons.
Storylines. Callie Torres is introduced as an orthopedic surgery resident with a crush on intern George O'Malley (T. R. Knight).
Cristina Yang is a researcher, Chief Medical Officer, and Director of Cardiothoracic Surgery at the Klausman Institute for Medical Research, having been trained at Seattle Grace Hospital, Seattle Grace Mercy West Hospital, and Grey Sloan Memorial Hospital.
She Wasn't The Best Doctor
All in all, April is considered to be one of the best trauma surgeons Grey Sloan has ever seen. However, she was actually fired from the hospital twice: once for neglect, which led to the death of a patient, and the second time for failing her board exams.
The character ultimately married paramedic Matthew Taylor (Justin Bruening), the former fiancé she'd left at the altar to run away with Jesse Williams' Jackson Avery. Throughout the series, Jackson and April's relationship was affectionately dubbed "Japril," and many fans lamented that they didn't end up together.