You never know for sure, but conventional doctors who are properly certified are 9000 times more likely to kill someone than gun owners. History has taught us that the brightest and most successful people were always the “drop-outs”. Credentials mean nothing. Actually, they mean less than nothing in this case, because credentials prove that someone has capitulated with the same educational establishment which has condoned profits through “managing” (making perpetual) illness and addictions for over a century.
However, there are a some general rules to follow concerning the credibility of healers. If he is recommending absurdities such as urine therapy, sun gazing, detoxifying foot pads, or ionized foot spa’s, then stay away. Double check everything that he says with your own research, and possibly even get a second opinion until you can trust him.