This information may help those who don't understand the VA vs. Non-VA doctor' s prescriptions. If you get a prescription from a non-VA doctor the VA will not honor it unless you are in the 40 mile exclusion and even then your prescription may not be ok'd depending upon it's purpose.
http://www.vetsfirst.org/vetsfirst-qa-will-va-fill-prescriptions-written-by-non-va-doctors/