Thanks Nelliemoser. Included in the blood tests was a thyroid test which, presumably, has come back OK. These tests were ordered by a gastroenterologist whom I have just started seeing for a different problem, so I'm very pleased that he picked up my low Vitamin D.
I'm just starting out on the Vitamin D journey, but am already finding the DEXA scan request very frustrating. The GP asked whether a family member had been diagnosed with osteoporosis. Well, no, but when my mother had her wrist fracture it was 1973 and no investigation was made of her bone health. She died two years later. It's entirely possible that she did have osteoporosis, but was never diagnosed.
I'll be seeing my GP again in a couple of weeks, so may well take the opportunity to put my case more forcefully. From what I've read already, the fracture risk assessment tests are to be used as guidance only and the doctor can use his/her own discretion about a DEXA scan.
I hope your own Vitamin D problems are soon sorted.