As Veteran, we are allowed a certain percentage of health care thru the VA. Much like most insurance policies, the VA will cover "some" percentage of your health care & prescriptions but, there will be a shared expense with your personal insurance or Medicaid co-pays.
In order to get free (well deserved) health care you need to be at least 70% service related disabled.
In order to get free health care, along with dental & visual, you need to be 100% service related disabled. This health care will also cover your spouse, altho wives are not eligible for the dental & visual care.
You need to file a disability claim with the Veterans Administration. You will need proof/documentation that your disability is service related. It's also recommended that you use an intermediary, such as the DAV (Disabled American Veterans), to file your claim as these people do this process every day & know the procedures.
It's time consuming but, actually easier than it sounds. Many of the issues we suffer as we get older can be directly attributed to the Military, especially RVN vets, because of the Agent Orange.
Bruce