Arizona Prop 106 bans Obamacare in state:

Bill: Proposition 106 (HCR 2014)

A “yes” vote shall have the effect of prohibiting the enactment of laws or rules that require any person, employer or health care provider to participate in any health care system. It will also allow a person or employer to forgo health insurance and pay for health care services directly without a penalty and will allow health care providers to accept direct payment without a penalty. It will specifically allow health insurance in private health care systems.
A “no” vote shall have the effect of retaining the current law regarding a person or entity’s health care choices.

Also: Ballotopedia: Arizona Health Insurance Reform Amendment, Proposition 106 (2010)

“Arizona ballot measure aimed at blocking federal health care plan approved by 55% of voters”

“Proposition 106 protects health care rights”