The website of the National Upper Cervical Chiropractic Association provides an online directory of members who are certified NUCCA doctors. Practitioners listed on this website must pass three levels of training before being listed as fully NUCCA board certified.
The NUCCA directory posts the training status of each listed practitioner. Listed members include doctors of chiropractic, students of chiropractic and some laypersons. The focus of this form of chiropractic practice is to correct the Atlas Subluxation Complex, which is a problem located in the upper cervical part of the spine. The Upper Cervical Research Foundation posts current research regarding this technique on its site.