Christina Applegate was misdiagnosed with multiple sclerosis. The Dead to Me star broke down in tears on Tuesday, October 20, as she revealed that her doctor now says she never had the disease she has battled publicly since 2021. “I’m back at square one,” she told listeners. Yet her reaction was anything but celebratory.
Applegate shared the news on her MeSsy podcast, co-hosted with fellow MS advocate Jamie-Lynn Sigler. The 54-year-old recalled the moment her doctor walked in with what most people would hear as good news. “She came into my room and said, ‘Congratulations, you don’t have MS,'” Applegate said. “I was, like, not happy at all. Everybody else was so happy.”
So instead of relief, she described a rush of grief for the years spent living inside the wrong diagnosis.
How Christina Applegate learned she was misdiagnosed
For five years, Applegate organized her life around the MS diagnosis. In addition, she built a public advocacy role on top of it. She stepped back from on-screen acting after the 2021 diagnosis and filmed the final season of Netflix’s Dead to Me under its shadow. However, the label is gone now, and the symptoms are not.
“You don’t get misdiagnosed and then all of the sudden I’m better,” she said. “I haven’t gotten better. If anything, I’ve gotten worse.” For example, she still uses a wheelchair at the doctor’s office and can’t walk from the car to the waiting room. “Nothing magical happened when she said, ‘You don’t have MS.’ Nothing magical happened.”
In fact, Applegate insists she had “every symptom” of MS — “every single one.” As a result, her doctors are now investigating what has actually been going on since 2021. Variety, moreover, reported that new technology led to the discovery.
“I feel like I let everybody down”: the emotional fallout
Applegate described herself as being in a “state of shock,” calling it “the same game with a different name.” Still, much of the pain, she admitted, comes from losing the identity she built around the diagnosis.
“It’s weird because I feel like I let everybody down,” she said. “It’s this weird feeling because I became this — you and I, the poster children for MS. And everything I was doing. I had a reason. I had a reason as to why my day sucked every day. And now I don’t have a reason and it’s very unnerving and it’s really confusing for me.”
Nevertheless, the diagnosis change has not eased a single symptom, she says.
Finally, she spoke openly about depression. “I’ve gone through a great depression because of it,” she said. “I lost everything. I lost my job, it stopped my life.”
Why the misdiagnosis news doesn’t bring relief
It may seem strange that good news could feel like a loss, but Applegate’s reaction makes sense. For years, MS was the reason behind her worst days. Now, she says, she has no reason at all — and no roadmap for what comes next. Meanwhile, the symptoms that upended her career are still very much present.
Why MS misdiagnoses happen
Meanwhile, Cedars-Sinai neurology professor Dr. Marwa Kaisey joined the episode’s second part. She explained that MS misdiagnoses are “fairly common” — roughly 20 percent of people diagnosed with MS turn out not to have the disease.
“We don’t have one single test for MS. It’s not like we have something like a pregnancy test that says, ‘Yes. You have it.’ ‘No. You don’t.’ It’s a list of criteria,” Dr. Kaisey said. For example, many neurological conditions can mirror MS, so doctors sometimes land on the wrong answer. Applegate put it more bluntly: a “pretty damn high number” of people are misdiagnosed every year.
News of the Christina Applegate misdiagnosis spread fast, with LADbible and OK Magazine among the outlets covering the episode.
Christina Applegate’s health journey: a timeline
But this is not her first serious health battle. Here is how her journey unfolded:
| Year | Milestone |
|---|---|
| 2008 | Breast cancer; double mastectomy; founded the charity Right Action for Women. |
| August 2021 | Announced her MS diagnosis publicly. |
| 2021–2022 | Filmed Netflix’s final Dead to Me season under its shadow. |
| 2023 | Stepped back from on-screen work as symptoms worsened. |
| Early 2026 | Months in the hospital; her MeSsy podcast went on a long break. |
| October 20, 2026 | Revealed on MeSsy that her MS diagnosis was a misdiagnosis. |
What’s next for Christina Applegate
First, her doctors will try to find the real cause of her symptoms — a full investigation into everything that has happened since 2021. Second, the conversation around MS diagnosis itself may get louder. When one of the world’s most visible MS advocates turns out not to have the disease, it spotlights how the condition is diagnosed.
Even so, Applegate has not lost her voice. She stays honest about her pain, and fans have flooded her with support. In fact, her years of advocacy raised awareness and built a community — and that community still needs her, diagnosis or not.
For more of this week’s biggest stories, see our breakdown of the Carson Daly death hoax and our tribute to Office Space favorite Richard Riehle.
