"They haven't talked at all since October," an inside source told Radar about the two women's fractured friendship.
That same month in 2018, the actress infamously suffered a breakdown, and checked into mental health treatment.
A source told Radar that the troubled star's drinking and partying led to the rehab stint.
As Radar readers know, Raisa, 31, donated an organ to Gomez, 27, in the summer of 2017 after the singer's kidneys began to fail due to Lupus.
Gomez admitted that without Raisa, she would have died.
“She gave me the ultimate gift and sacrifice by donating her kidney to me,” Gomez said. “I am incredibly blessed.”
But just months after her life-saving kidney transplant surgery, Radar reported Gomez was spotted drinking alcohol at the Four Seasons Hotel in New York.
New York City-based rheumatologist, Dr. Robert Fafalak – who has not treated Gomez – told Radar that if the Lupus-sufferer continued to booze, she could die.
When fans questioned the fragile Gomez' decision to drink, she brushed off the concerns.
“As far as my personal life, someone sees me having a glass of wine? I could give two s***s. I’m not trying to hide. That’s my life,” she huffed in an interview with Elle.
Raisa has said she went through physical and emotional agony following her transplant surgery with Gomez.
She said she was so fragile, "I couldn't pick up my dog — he's 16 pounds. That was rough. I couldn't walk him."
In past years, Raisa — who has not been seen with her former friend in over a year — has paid tribute to Gomez's birthday on July 22. But this year, she didn't publicly comment about the star's big day.
Neither Raisa or Gomez has spoken out about the status of their friendship.