This is the best single source I know for this information.
http://www.bls.gov/oco/
5. Complete the chart. For each provider category briefly describe the education and licensing requirements for practice in the state in which you reside. Then, in the scope of care column, describe the type of care the provider can and cannot legally provide in the state in which you reside.
Provider Category,Education required, License Required,Scope of Care, Can the provider write prescriptions?
Ophthalmologist
Optometrist
Orthopedic Surgeon
Podiatrist
Chiropractor
Physical Therapist
Physician’s Assistant
Nurse Practitioner
Dentist
Psychologist
Psychiatrist
Hypnosis Practitioner
Reiki Therapist
Radiologist
Pharmacist
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