Ask your doctor to complete and submit a prior authorization form for the drug you need. It's possible to get approval for it if there's good enough justification. I've been able to obtain non-formulary drugs this way.
I've had a similar experience. I had the Dr. do a prior authorization and they still would no approve it. But I wrote an appeal letter to MEDCO (the pharmacy end) and it was approved, so that may be another avenue.
I agree 1000% that Cigna sucks. You can be totally right that they should pay a claim (especially when they incorrectly pay in-network providers as out-of-network) -- even if their telephone customer support people agree with you and everyone you can talk to says you're right -- still you get an EOB 4 months later that denies the claim.
Cigna will do anything they can to avoid paying what they owe.
I have had over 100 disputes with Cigna, some of which have spanned over 3 years before they're finally paid. ALL of them have eventually been paid if I disputed for long enough and if I got my company's HR department involved (except for some claims which the providers just wrote off -- another favorite tactic of Cigna's).
If any corporate HR department people are reading these boards: don't choose Cigna for your company. Your employees deserve better.
Note: it is true, as one response here says, that sometimes the provider can have better luck with a preauth than you can. There are some providers that are especially good at this and have employees specifically dedicated to it - particularly home health care providers, medical device companies and wheelchair companies.
Speaking of Cigna, I have Cigna right now and had to file a claim myself because I got sick while I was on vacation out of the country and saw a doctor. I put the charge on my credit card so that when I got back I could send them my card statement along with the reciept. I sent my claim to Cigna in December and I have not heard back from them since. Luckily the bill was not a lot of money, of course since I was not in the USA! (the dr visit was about $50-60, and my copay alone is $30 with cigna, so I guess there wasn't much point to file a cliam anyways!) So I'm not too upset but shouldn't they at least send a rejection letter or something? My COBRA ends soon so luckily I don't have to have Cigna anymore, I guess thats good news.