I guess it depends on where you live. I live in the state of California and have used Indian Health Services a number of times (dental & basic needs). My son is also eligible for services and has received the majority of his shots from the San Manuel Indian clinic. If a clinic is funded by IHS (federal funds), they must accept enrolled Freedmen (Cherokee & Seminole) and their immediate family living in the household. We must remember that the federal definition of an Indian is one that is an enrolled member of a FEDERALLY RECOGNIZED TRIBE. Any federally funded Indian clinic that is not adhering to these guidelines should be reported immediately. I have provided a link with the IHS eligibility requirements below:

http://www.ihs.gov/GeneralWeb/HelpCenter/CustomerServices/elig.asp