I was able to, but it's incredibly hard. I've been in treatment since I was 12. I have a record of hospitalizations, PTSD, long term depression and anxiety, failed jobs and they still denied me.
I had to appeal and meet with a judge. They only approved me because I had been open with a previous therapist about my suicidal ideation and how severe it is. I think the whole process took almost two years? I was approved in early 2020 and I'm already up for review, which I'm sure I'll lose, despite my symptoms getting worse.
I would really advise you to get an attorney as they can help make this a little bit more bearable and they'll tell you everything you need to do. If you can't afford one, then legal aid lawyers will help as well.
It'll help if you have lots of medical records and documentation backing up what you're dealing with. If you don't have a therapist or psychiatrist, then your primary doctor can help in this regard.
They're a bunch of bastards. It'll be hard a process and they'll want you to give up, lots of people do, but if you get denied for whatever reason, you have to keep fighting them.