Dude, I'm Bipolar, and the VA does drag its feet. Find other service members who have been prescribed ADHD meds and see what they did. I don't use the VA, but my psychiatrist and therapist diagnosed me with Bipolar and said it wasn't ADHD, even though I had plenty of lifelong impairments. I stayed with that doctor's office for eight years, and I was on and off meds for bipolar, and nothing worked. It wasn't until I ended up in a mental hospital that I finally said enough was enough. I was finally fed up, and after they shew-ed me away for the final time, I finally decided to find another doctor and get a second opinion.
Well, I still have bipolar disorder, but now I'm medicated for ADHD. It changed my life. Now I never have to worry about my bipolar symptoms because keeping up with good habits like sleep, eating, and working out is a breeze on ADHD medication. This keeps my bipolar at bay, and I still take meds. I can't tell you how awesome my life keeps turning out now that I'm medicated. Fight for this! They don't understand what we are going through or they wouldn't stop us from getting damn relief.