My friend has badly controlled T2 diabetes and won't test as often as she is told to. She is a nurse, 59 and really has bad habits. Her HbA1c most recently was 11.2

Anyway her insurance company has told her unless she tests like they tell her to, and she gets her HbA1c down, they will be charging her $50 a month more to cover the cost of complications that are likely to arise.

This seems entirely reasonable to me, but I was wondering-how common is it?