Practitioner

A practitioner is someone who engages in an occupation, profession, religion, or way of life.

of interest to psychologists are: A medical practitioner or registered medical practitioner refers to occupations such as
 * Physician
 * General practitioner, a primary care physician
 * Ophthalmic medical practitioner, an eye doctor
 * Mid-level practitioner
 * Nurse practitioner
 * Operating Department Practitioners
 * Emergency care practitioner
 * Psychiatric and mental health Nurse Practitioner