For Addison Montgomery see the Grey's Anatomy Former Main Characters page. For Amelia Shepherd see the Grey's Anatomy page.
Dr. Naomi Bennett (Portrayed by Audra McDonald)
Appeared in Private Practice (S1-4, S6); Grey's Anatomy (S3, S5)
An OB/GYN and reproductive and endocrinologist specialist, she has an on-off relationship with Sam. One of Addison's best friends, and a majority owner of the practice. Previously portrayed by Merrin Dungey, for the Backdoor Pilot.
- Belligerent Sexual Tension: With Fife.
- Beware the Nice Ones: She's a kind woman, but don't make her angry.
- Black Best Friend: To Addison.
- Nice Girl: One of the nicest characters in the cast, though she shows moments where she can let her anger get the better of her.
- O.O.C. Is Serious Business: When she learns Maya is pregnant, the normally laidback Naomi is furious and unrecognizable. She goes as far as slapping her own daughter in the face and yells at Addison to give her an abortion.
- Parental Substitute: To Betsy, whom she adopts after her other adoptive family abandons her.
- Tsundere: Towards Fife.
- Will They or Won't They?: With Sam. They do, in the end.
Dr. Samuel "Sam" Bennett (Portrayed by Taye Diggs)
Appeared in Grey's Anatomy (S3, S5); Private Practice (S1-6)
One of Addison's best friends from college and her next door neighbor in LA, he married Naomi twice. He is a certified cardiothoracic surgeon but pursued a career in Internal Medicine. He has asthma and was hospitalized at Seattle Grace after an attack.
- Papa Wolf: Over Maya. When he learned her boyfriend got her pregnant, he drove to the basketball court he was playing and angrily confronts him.
Dr. Violet Turner (Portrayed by Amy Brenneman)
Appeared in Grey's Anatomy (S3); Private Practice (S1-6)
Violet is a psychiatrist working largely with the pregnant women coming through the practice as this is its specialty. She has a son with Pete, but he was born through traumatic c-section and delivered by a patient having a schizophrenic delusion after she attacked and paralyzed Violet. After this Violet went into post-partum depression but eventually recovers and reconciles with Pete and Lucas.
- Alone with the Psycho: Her schizophrenic patient Katie drugs her and rips her baby out of her body. But before that, Violet begs her not to do it and tells her where to cut her belly so she doesn't kill her baby. Yikes...
- Missing Mom: For a moment, she gives Lucas to Pete's care and is too distraught by her experience with Katie to even look at her son. She eventually subverts this thanks to seeing another psychiatrist and decides to embrace her role as Lucas' mother.
- Nice Girl: Probably the nicest of the cast. She's even surprisingly forgiving towards the crazy girl who cut her baby out of her, a she realizes said girl is completely insane.
- Rape as Backstory: Violet said she was raped in her college years and her best friend helped her through it.
- The Shrink: Along with Sheldon.
- Widow Woman: After Pete's death where she has to raise Lucas alone.
Dr. Charlotte King (Portrayed by KaDee Strickland)
Appeared in Private Practice (S1-6)
Charlotte is the Chief of Staff at St. Ambrose Hospital, and an attending who visits at the various private practices even though she despises private practices. She is a urologist and sexologist, showing a contrast to her rough Southern girl upbringing. After discovering her husband cheating on her, the other woman attacked her and she became addicted to pain medication for a period, at one point causing a terrible crash — this makes her further unsympathetic, but she is developed from her antagonist role after joining the private practice. She is married to Cooper, with whom she has three daughters. Though she considered naming a daughter after her old horse, Marjorie, she instead went with Southern States for Georgia and Caroline, and the traditional Rachel.
- Broken Bird: After being raped in her office.
- Daddy's Girl: She was close of her father Big Daddy, and his death broke her.
- Dr. Jerk: She's the chief off staff of St-Ambrose, but she's one despicable bitch. Thanks to Character Development, she slowly subverts this trope.
- Jerk with a Heart of Gold: Starts out as a flat-out Jerkass, but as the series go on Charlotte is shown to be not as bad as she seems, and she really takes her job seriously and cares about her patients.
- Lady Killer In Love: She enjoyed quick feelings-less sexual encounters in the past, but ends up falling in love with Cooper and marrying him.
- Parental Substitute: She ends up as Mason's second maternal figure after the death of his mother.
- Rape as Drama: A crazy patient follows her to her office and violently beats and rapes her there.
- Really Gets Around: Before meeting Cooper. Even then, they were only Friends with Benefits.
- Single Woman Seeks Good Man: Starts to genuinely fall in love with Cooper and ends up marrying him.
- Stereotype Flip: Despite being from the South she's a pretty big jerk.
- Took a Level in Kindness: She was a pretty big bitch in the first season, but starts mellowing around Season 3. Dating Cooper also helps.
Dr. Cooper Freedman (Portrayed by Paul Adelstein)
Appeared in Grey's Anatomy (S3); Private Practice (S1-6)
A pediatrician and Charlotte's husband.
- Adorkable: At times. It's extremely endearing.
- Berserk Button: After Charlotte's rape, when one of his young patients tell him he doesn't want to be touched anymore, Cooper then proceeds to beat the living shit out of the kid's father, thinking he was the one molesting him (when actually it was his mother).
- Crazy Jealous Guy: He physically fought with Sheldon over Charlotte due to knowing they were sleeping together. And it was when they were broken up.
- Friend to All Children: Due to being a pediatrician, Cooper loves children and wishes to have some of his own.
- Papa Wolf: Over his kid patients, and eventually his biological son Mason.
- Understanding Boyfriend: After Charlotte's rape, Cooper supports her emotionally through the whole thing, even if he sometimes let his emotions and protectiveness get the better of him.
- Unstoppable Rage: When one of his patients tell him he's getting fat to protect himself from being molested, Cooper snaps and beats up the kid's dad. Unfortunately for Cooper, it was not the father the culprit: it was the mother.
Dr. Sheldon Wallace (Portrayed by Brian Benben)
Appeared in Private Practice (S2-6)
Sheldon was a psychiatrist at the private practice but quit when he got cancer. He had previously worked at a veteran hospital during an Iraq war, and is a friend of Amelia Shepherd despite her being romantically interested in him and his ignoring her during the death of her baby.
Dr. Jacob "Jake" Reilly (Portrayed by Benjamin Bratt)
Appeared in Private Practice (S4-6)
Addison's husband, that she marries at the end of Private Practice. He replaced Naomi as endocrinologist at the practice when she left LA.
RN William Dell Parker (Portrayed by Chris Lowell)
Appeared in Grey's Anatomy (S3); Private Practice (S1-3)
Dell was a young nurse and midwife, who worked at the private practice and briefly at St. Ambrose. He had a tumultuous upbringing, being addicted to heroin and getting his girlfriend, Heather, pregnant at 17. They formed a loving family for their daughter, but Heather still struggled with drug issues. One night she was trying to cook meth and blew up their house, burning the baby. She and Dell fought, and Dell took their daughter away, but regretted this when Heather then died. He shadowed his friends at the practice to aid him in his pursuit of becoming a doctor whilst he worked as a receptionist, being accepted to medical school at UCLA but dying before he could start after he was involved in a car crash and the doctors didn't get a head CT to check the bleeding. His daughter was adopted to Naomi when she left for New York.
Dr. Peter Wilder (Portrayed by Tim Daly)
Appeared in Grey's Anatomy (S3); Private Practice (S1-5)
Pete worked in critical care and alternative medicine, and an infectious disease specialist. He suffered from heart problems and on the day of his court trial for medical malpractice — he took a patient who wanted to die off life support even though they couldn't legally consent — he went for a jog and suffered a fatal heart attack. Violet went to him even though they had been consistently having relationship issues.
- Disappeared Dad: Unfortunately becomes this to Lucas when he has a heart attack on a job and dies alone.
- Dr Feel Good: Not as extreme as most examples, but Pete does recommend marijuana as medicine for some of his patients.
- Took a Level in Jerkass: Towards the end of his tumultuous marriage with Violet, Pete was being a major dick to her even if Violet was trying her best to keep their marriage from crumbling and be a good mother to Lucas.