As you correctly state, a chiropractor isn’t a doctor. Chiropractic practitioners are proponents of pseudoscience and do not stand up to scientific scrutiny.
That you can get chiropractic stem cell treatment is a new one on me. He may well seem to be extremely knowledgeable but if you aren’t extremely knowledgeable, how would you be able to tell?
I only offer those thoughts as a word of caution. You’re putting a lot of faith into someone who has decided that a certificate in a pseudoscience is the qualification he needs, as opposed to studying to become a doctor.