The death penalty is officially off the table for accused healthcare CEO killer Luigi Mangione.

Manhattan federal prosecutors revealed Friday that they won’t appeal a judge’s ruling that axed capital punishment charges against the 27-year-old Ivy League graduate.

The U.S. Attorneys Office for the Southern District wrote in a letter that it will accept Judge Margarett Garnett ‘s Jan.30 decision to toss the death-penalty-eligible murder rap, citing legal flaws.

The 27-year-old accused killer will still face life in prison at his upcoming federal trial — slated to start in September — if convicted of fatally shooting UnitedHealthCare CEO Brian Thompson in a Dec.4, 2024 targeted hit on a Midtown sidewalk.

But Mangione won’t technically be charged with murder in the federal case, and will instead face a charge of “stalking” Thompson, leading to the father-of-two’s death.