It is true if you have CGM, medicare will not cover test strips. Personally, I have found CGM to be too inaccurate for me to use, especially for insulin dosing. The instrument itself is accurate. It is the methodology that is inaccurate. The instrument accurately measures interstitial glucose (the glucose in the fluid between the cells). However, interstitial glucose may not correlate with blood glucose.
So, if you want to stay on CGM and purchase your own test strips, I have found the Contour Next test strips on Amazon for $30/100.