If you have previously given your details to health funds, there is no need to inform them that you are using ECLIPSE, unless you need to change your banking details. Inpatient Medical Claims (IMC) are transmitted via Medicare's ECLIPSE gateway, and after processing by Medicare are passed on to the participating funds. As the funds already have your bank account details linked to your provider number(s) they can process the claims and make payment into your nominated account as before.
If you've never sent claims to funds and haven't yet nominated banking details with each fund, then you will need to do this before submitting claims, or they may be rejected. The links and contact details below will help you to get set up with the funds. This is not an exhaustive list, however, it does cover most of the funds you are likely to come across.
AHSA AHSA is the umbrella organisation for 25+ 'Alliance' funds.