Is regenerative cell therapy, aka stem cell therapy, for osteoarthritis of the knee a covered procedure?

I'm looking for options  to repair,relieve the  pain , of osteoarthritis  pain in the knee.
right now my options are: 1) cortisone,steroid injections
2)uni compartiment  surgery
3) total knee replacement surgery.
i have heard mixed reviews regarding stem cell/ regenerative  cell therapy.  just wondering if it's covered.