Explaining the Alphabet soup that is Healthcare.
DPT/PT = Doctor of Physical Therapy has a doctorate degree, some Physical Therapist may have a masters degree. DPT/PTs are licensed per state, with direct access in most states (no prescription required!).
PTA = Physical Therapy Assistant has an associate's degree. PTAs are licensed per state and must work under a PT.
Chiropractic Assistants = There is no schooling required, but they must work under a chiropractor to be licensed.
CSCS = Certified Strength Conditioning Specialist requires bachelor's degree and passing score on the NSCA exam.
ATC = Athletic Trainer has a bachelor's degree. ATCs are licensed per state and must work under a physician.