Welcome new member.
There are hundreds of insurance companies and plans The plans and who can get a specific expensive new drug can very a lot.
If you live in the US this look up tool can give you an idea state by state
my post on this was moved to Hepatitis Social Community by a MHmod
http://www.medhelp.org/posts/Hepatitis-Social/Formulary-Lookup-Tool---US-drug-status-for-health-plans/show/2091595#post_9914883
(it is usually updated almost daily even (accuracy is not guaranteed) sometimes before the insurance company adds it to the formulary on their site.
If you have insurance your best bet is to contact them or through your doctor. If it is covered your doctor will have to proscribe it first and submit for pre approval.in most situations. If you are looking to purchase insurance or get assigned to one then you will have to contact each one for more info.
The drug company may be able to help you even to find insurance call the number listed. They also have procedures to get discounts or even for free if you quailify.,
http://www.gilead.com/responsibility/us-patient-access/support%20path%20for%20sovaldi
More topics regarding if applicable
Getting assistance with Sovaldi on Medicare, Medicaid, etc.
http://www.medhelp.org/posts/Hepatitis-C/Getting-assistance-with-Sovaldi-on-Medicare--Medicaid--etc/show/2064661#post_9955054
Wish you well getting Sovaldi