My DS had passed DoDMERB and earned a 3 year scholarship back in 2015. Last January, he was demonstrating some extreme snowboarding stunts (he is an instructor) and took a bad fall, fracturing his pelvis, and his radius plus dislocating his shoulder.
After discharge, he did not miss a single academic or MIL-SCI class. He was on PT restriction while on crutches for 90 days, after which he went back to snowboarding, scored a 285 APFT and secured a full release from his orthopedist.
His battalion did not ask for any additional medical reviews. (I'm not sure his PMS even notified Cadet Command).
My DS never missed a stipend or tuition payment as a result of his keeping his battalion fully informed and taking his recuperation seriously.
Good luck to your DS!