My doctor wanted me to have a dexa scan as I had really bad joint pain, and as my mum had osteoporosis, she thought I should have one done. My friend had been waiting 5 months for one with no appointment in sight, so I decided to have one done privately. It cost just under £200. It took a week for the results, but the hospital wouldn't give them to me, they went to my doctor but I couldn't get an appointment for 3 weeks, and the hospital wouldn't tell me over the phone.
Eventually my appointment came round,and then the doctor informed me that yes I had osteoporosis in my spine, but my hips were not tested, and if I'd had an NHS scan, they would have been. I think that is scandalous. If anyone is thinking of going private. Check first.