The newlyweds were biking in Deadwood, South Dakota when Moser's bike crossed the center divide and collided with an oncoming vehicle.
According to a statement on Judd's official website, "Moser’s left leg was severed at the scene of the accident and doctors in Rapid City, SD amputated the leg above the knee."
Moser had surgery on his hand and is now said to have remaining injuries that are "non-life threatening."
"The outpouring of prayer and support from friends, family and fans has been a blessing to both Cactus and I. Cactus is a champion. I love him deeply and I will not leave his side," the singer said in a statement.
Judd has postponed her scheduled concerts in Canada next week due to the accident.
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