Contrary to assertions that in-home and in doctor's office A1C tests are accurate enough, according to this article in Endocrine Today, A1CNow and A1CNow+ are not proven to be accurate enough for "routine use."
What I read clearly is that there are studies that absolutely say they are not good enough to be used for regular use. I also read that a "redo" study was done by the manufacturer (Bayer) and then it passed but this article can not say the product was actually improved - just that it passed the second time around. Warning signals go up in my mind. Having worked for a company that had to MAKE products pass certain government tests and knowing what they will do to get them to pass, I'd put money on it, they rigged/manipulated the testing and they did not improve the accuracy of the product at all.
These tests have to be certified in order to be covered by Medicare and by the National Glycohemoglobin Standardization Program. They also have their own Medicare billing codes, separate from lab A1C billing codes - thus, many insurers are paying for two per visit! That's fine to determine if the in-office tests are accurate but double billing insurers will cost us all in premium increases. I prefer to wait the few hours it takes a hospital lab to do my A1C. I choose to do it a few days before my appointment so the doctor has the results before I arrive. My hospital lab is open 24/7 so i can do it on my schedule.
In conclusion, I will continue to demand in lab A1C testing only.
Doris J. Dickson