You might ask your endo to use the prior dxa with the insurance. After their oversight or neglect. If your insurance won't approve you may be eligible for pharmaceutical company help. Usually all they require is a prescription. Will your endo still prescribe now that your numbers have improved. Your results are so good that I don't think it can be the strontium alone. I would maintain the quarter dose. It is interesting that your endo suspects it might not matter how much you take. If the 80 mcg only yields 36mcg bioavailability, maybe the other 44mcg only causes side effects. Best wishes. https://www.tymlos.com/hcp/resources/.