If your insurance provider doesn't yet have an address associated with it, here's how you can add one.
1) Go to MY ACCOUNT > SETTINGS > INSURANCE PROVIDERS
2) Search for your insurance provider by the provider's name, the payer name, or the payer ID.
3) Once you've found the payer/provider, add the address by clicking on the +Address link.
4) Don't forget to click Save.
Edit an insurance address
If you need to edit an insurance address, you can by clicking on the address you want to change. You'll then be able to edit the address fields.