I presume if one is able to log into a Nike+ account on the nano, then the data can be transferred to an iPhone which is connected to the Health app. However, if the nano's Nike+ data is only available/accessible on the nano itself and isn't/can't be connected to an account, then no, the nano cannot connect to the Health app.
Health will not support Nike+ until iOS 8 is released.
Thanks for answering! Yes, the iPod nano does connect to your Nike+ account when you sync it with your iTunes account! So hopefully it will transfer the information to the health app in iOS8!!!