It can be difficult being Active Duty Army, and hearing about recommendations outside of the Army's medical system, as we go where the Army tells us to. Believe me, I know, I am a Medic that was assigned to a major Army hospital. One way you might be able to see an outsider, is to get the PAO (Patient Advocate Office) to intervene, and they could possibly work with Managed Care to get you to the outside Doctor, but then again through Army Regulations, we go where they say.

Have you been offered or have you considered a MEB (Medical Evaluation Board) per AR 40-501?