Medicare 的确是用不同的guideline, 关于code的信息有用，谢谢。按说大部分保险是应该管的。

If you are a Medicare beneficiary, however, the screening colonoscopy guidelines differ. If your doctor finds a polyp, the screening colonoscopy is coded as a diagnostic colonoscopy, and you will be responsible for a copayment.

根据我查到的信息，至少从2018年开始，用commercial insurance的人应该是保险全付的，除了药的钱。这是联邦的政策。我从联邦劳工部查到的。参看我前面的帖子。