Medicare reimbursement?

Hey everyone, I’m looking for some insight here. Does anyone know if I can actually get reimbursed by Medicare if I decide to go through a private clinic for an MRI? The hospital told me I’d be stuck on a waiting list for at least three months, and honestly, this was pretty urgent for me. Just for context, I have supplemental insurance and I'm currently unemployed at the moment.
I apologize if I’ve missed a thread where this was already discussed, but I couldn't find anything similar during my search. Thanks.