CDIB Certificate of degree of Indian Blood. You have to be on a tribe's geneological list or you can't prove you are Indian.
Lots of Okies have Indian blood, but can't prove it, but a lot of part Indians who lose their insurance do the geneological investigation to get free medical care. My patient was one quarter, I.E. he had one full blooded Indian grandparent, so he qualified for free care when he got heart problems.
In most states, Indians are on reservations, and the only clinics are those run by the Indian Health Service. In Oklahoma, there is a lot of Assimilation, and no reservations, but they still run Indian clinics for those who can't afford regular medical care in rural areas. We have a clinic 45 minutes from our town, and people come to us and sometimes go there...
Thanks for that explanation about the CDIB, that was most interesting. I didn't know that the Indian Nations had their own form of government socialized medicine.