Do I have to wait for open enrollment if I have never had coverage prior to Obamacare?
Health insurance can only be obtained during open enrollment. This applies to coverage inside and outside of ObamaCare's Health Insurance Marketplace. This is true even if you have never had coverage before, but there are exceptions if you are losing coverage for any reason other than non-payment of fraud.
Each insurance type actually has it's own open enrollment period. Each insurance types enrollment period works a little different, for instance Medicaid and CHIP can be enrolled in any time of year, but Medicare has different rules for it's initial enrollment period.
The subject can be a little complex so we suggest going to our page on open enrollment to learn everything you need to know.