Tricare has temporarily suspended the need for prior authorization and referral to receive the H1N1 vaccine from any Tricare-authorized provider. What this means is that you can go to a Tricare-authorized provider to get the H1N1 vaccine without seeing your primary care provider first. With some areas experiencing a scarcity of the vaccine, this will allow you to get the vaccine from the providers who have it without waiting and possibly missing your opportunity. Pharmacists are not considered Tricare-authorized providers and therefore you will not be able to use this benefit at a pharmacy vaccination clinic.
This page from the CDC provides additional information about Tricare and the H1N1 vaccine - scroll down to find the Tricare section.
This temporary change to policy is only in effect from October 1, 2009 to April 30, 2010.