Options for choosing health professionals As of January 1, 2004, if you are injured and ill, you may make your initial choice of health professional from among the following four groups of health professionals: Chiropractors, Physicians, Physiotherapists, and Registered Nurses (Extended Class). This change means that you may see Physiotherapists and Registered Nurses (Extended Class) – RN (EC) – without a referral from a Physician or a Chiropractor. For more information, contact your adjudicator.