1. You use POS 11 for G0179 & G0180 since it is for the certification and recertification which is done by the dr, in the office.
2. Many insurance carriers require preauth for home health services. The preauth number must be on the claim.
3. Any carrier that requires preauth, usually requires that the preauth number be on the claim. There is no list of carriers, it depends on the plans in the area that the services were performed in.
Michele