Unfortunately, I'm not sure you can hold them to the authorization that they verbally told you. It is not like have the pre-authorization they send in writing to a provider that they will pay it before treatment starts. I would suggest you obtain a full copy of your health insurance plan to be sure what the requirements are, whether it is 6 mos or 1 year. Also your doctor may be able to help to state it was not pre-existing unless the medication you received was for this exact issue you sought treatment for. Once you have all the information, you may be able to appeal their denial of coverage. Good luck. Fortunately this issue will be null and void under the Affordable Care Act.
This information provided does not create an attorney-client relationship and is for informational/educational information onlyl.