Returned to Genoa City in 2011 in his twenties
Surgeon; rheumatology specialist
Martial arts teacher at the community center
Graduate of Johns Hopkins University Medical School
Formerly attended boarding school in England
Former student at Walnut Grove Academy
Lakeview Towers penthouse A at 1500 Market Street
Olivia Barber (mother)
Nathan Hastings Sr. (father; deceased)
Lillie Belle Barber (grandmother)
Walter Barber (grandfather)
Drucilla Barber (aunt) (presumed deceased)
Lily Winters (cousin)
Devon Hamilton Winters (cousin by adoption)
Carolyn unknown last name (deceased) (2017, engaged)
Arrested for being a party to Victor kidnapping Nikki Newman; cleared of charges 
Former mobster, Nathan Hastings, was a detective with the Paul Williams Detective Agency. Nathan fell in love with Dr. Olivia Barber. Nathan and Olivia married. Olivia's sister Drucilla was her reluctant maid of honor, since Dru had a crush on Nathan herself. Dru commiserated with Neil Winters, who also was secretly in love with Olivia, but Dru and Neil ended up falling in love. It was obvious both couples were mismatched. The scholarly Olivia was married to the former criminal Nathan, and the former criminal Dru was with the well-educated Neil.
A pregnant Olivia was diagnosed with ovarian cancer, but refused to abort the baby to save her own life. Nathan Jr., known from birth as Nate, was delivered early to save Olivia's life. Liv had been planning to have a hysterectomy afterward, but the subject of her surgery and her cancer was never addressed further. A few years later, Drucilla had a daughter, Lily, and through the years, Lily and Nate were always best friends.
Years later Nathan and Olivia were not getting along because Olivia took her mentally ill mother's side against Nathan. So Nathan had an affair with the beautiful Keesha Monroe. Olivia became suspicious, and both Dru and Neil cautioned Nathan after they caught him with Keesha. Each time Nathan tried to end the affair, Olivia did something to drive Nathan back into Keesha's arms. But Nathan finally ended the affair, and he and Liv began trying to have another child. Just as Keesha was falling in love with Malcolm, he found out about the affair with Nathan and dumped her. Then Keesha began getting persistent calls from old boyfriend, Stan, who later died of AIDS. Keesha went to Dr. Liv, turned out to be HIV-positive, and had to tell Nathan. Dru decided to tell Olivia about Nathan's affair with Keesha. Liv was furious that Nathan had betrayed her, and had also endangered her and their son Nate with HIV. Liv kicked Nathan out and forbade him to ever see their son again. All three of them tested HIV-negative, but Keesha was doomed with full-blown AIDS and later died. Nathan became desperate to see his son, and kidnapped Nate. Life on the run was rough on Nate, so Nathan finally did the right thing, and was returning Nate to Olivia when he was struck by a car and killed.
Neil's brother, Malcolm, and Olivia were married a couple years later, and Nate was thrilled to have the exciting and fun-loving Malcolm as his new daddy. But eventually Liv began spending too much time at the hospital and not enough time on her marriage. Malcolm and Nate's nanny, Julia, were raising Nate. Olivia suddenly began being suspicious of Malcolm over nothing and ended up driving him into another woman's arms. Malcolm tried to patch things up with Liv and convince her she was wrong about him, but Liv suddenly couldn't decide if she wanted Malcolm back or not. Her mind was on Neil, the man to whom she was always drawn and much more suited. Much to Nate's disappointment, Malcolm asked Liv for a divorce and moved out.
Then the always work-obsessed Olivia started getting symptoms she refused to recognize and ended up on her deathbed with aplastic anemia. She further alienated Malcolm when she changed her will allowing Neil to raise Nate if she died. Dru returned to Genoa City with Lily in tow and donated bone marrow to save Olivia's life. Olivia's near-death changed her holier-than-thou attitude, but it was short-lived. Olivia decided that Malcolm was not a fit role model for her son, refused to let them see each other, and again set her sights on Neil. Malcolm sued for visitation and won. Nate loved Malcolm and still thought of him as his daddy, although it was never made legal. Then Malcolm disappeared in an accident on a photo shoot in Kenya, and was presumed dead.
Nate began getting close to his "Uncle" Neil then, but Neil was drowning his guilt over Malcolm's death in alcohol. So Olivia banned Nate from seeing Neil, too. Brad Carlton, husband of Olivia's best friend, Ashley, tried to step into the void. Later, Nate was happy to see his cousin Lily return to Genoa City from years living in Paris. Neil went on the wagon, and he and Drucilla were remarried.
Three years after he was declared dead, Malcolm showed up in Genoa City, very much alive, sporting cornrows and a bad attitude. Malcolm as out for revenge against the brother who he thought had stole his fiancée and left him for dead in Kenya. But mostly he returned to see Nate again. Olivia was resentful that Malcolm didn't make himself known to Nate as soon as possible, and made him wait to reveal himself until the 15-year-old Nate returned from boarding school at the end of the semester. Nate never returned, and Malcolm disappeared once again.
In November 2008, Olivia returned to Genoa City and mentioned that Nate was now in Medical School in Baltimore at Johns Hopkins University. Nate since mentioned that he had been on the Olympic swim team, competing in the fifty and 100 meter butterfly and freestyle, but had not gone further than Trials, due to concentrating on his medical degree.
In February 2011, Nate, a Rheumatology specialist practicing in Boston, returned to Genoa City to perform a partial liver transplant on undercover FBI agent, Ronan Malloy, using the liver of his half-brother Chance Chancellor. Chance had been called in from witness protection when he was found to be a donor match for Ronan. Chance came through the surgery fine, but as soon as Ronan's surgery was finished, Ronan was taken away by an unmarked helicopter under orders from the FBI. Nate was shocked and very concerned for his patient, saying it was very dangerous for Ronan in his condition.
After surgery, Malcolm was there when Nate visited his cousin Lily to give condolences on the murder of her husband Cane. Neither Nate nor Malcolm was surprised to see each other, so viewers were left to assume that they have been in contact since Malcolm returned from the dead.
Dr. Nate has appeared sporadically afterward, once at the wedding of Malcolm and Sofia.
In July 2018, Nate showed up in Genoa City at the behest of Neil to secretly handle the illness of Victor Newman, and was living with Neil in Neil’s penthouse. Hilary Curtis took an immediate dislike to Nate, and was insulting, accusing him of not being able to get a woman. Neil explained that Nate had been in love and about to be engaged when Carolyn, the love of his life had died.
When a pregnant Hilary was in critical condition following a car accident, Dr. West tried to save both Hilary and her baby. Dr. Nate took over despite Hilary refusing, calling him egotistical and rude. The baby didn’t make it, and Hilary had suffered a ruptured liver and aortic tear. Hilary thanked Nate for saving her life. But Nate told her lover Devon to prepare himself, that Hilary had a disseminated vascular coagulation and was going to die. Devon arranged for them to marry in the hospital, and she died in his arms later that day.
Dr. Nate took over Nikki’s care for her MS, and offered help to Victoria as well. He warned all three Newmans that they needed to take his medical advice or they would no longer be his patients. Nate also taught martial arts to kids at the community center.
Nate realized that Devon was spiraling out of control with wild parties and new friends taking advantage of him, all to mask his pain and panic attacks over losing Hilary. Nate talked to him and got him to see a therapist.
Dr. Nate was the ER doctor on duty when Nikki Newman was brought in after she she stepped off a curb into the path of a car and ended up with a brain contusion and unconscious. She was on her deathbed when Victor managed to sneak in during the night and get her to wake up. Victor coerced Dr. Nate into helping him take Nikki away in an ambulance to safety. But her blood pressure spiked on the way. Afraid she would die, Nate went back for medication, then met Victor at an airstrip. The plane took off, but the police were able to stop the plane, and Victor was arrested for kidnapping. Nikki claimed she made Victor take her out of the country for protection and would sue for wrongful prosecution. Nate and Nikki were cleared of charges.