Why transfer the name to iPage? I use about 5 domain name registrars for regional extensions and one main registrar.
I have my hosting all with one company and I point those domain names at my Host Name/Address.
Of course it is possible to buy a domain name at one registrar and then transfer it to another registrar however I think they all have different rules about how long it is before you can transfer the domain and, if I recall correctly, when you do transfer the name the new registrar may/will charge you for another year's registration, check that out.
There is nothing that compels you to use your host as the registrar, well, insofar as I know, I've never had to do that in 20 years.