66719

Thyroid function tests (comprising the service described in item 66716 and either or both of a test for free thyroxine and a test for free T3) for a patient, if: (a) the patient has a level of TSH that is outside the normal reference range for the particular method of assay used to determine the level; or (b) the request from the requesting medical practitioner indicates that the tests are performed: (i) for the purpose of monitoring thyroid disease in the patient; or (ii) to investigate the sick euthyroid syndrome if the patient is an admitted patient; or (iii) to investigate dementia or psychiatric illness of the patient; or (iv) to investigate amenorrhoea or infertility of the patient; or (c) the request from the requesting medical practitioner indicates that the medical practitioner suspects the patient has a pituitary dysfunction; or (d) the request from the requesting medical practitioner indicates that the patient is on drugs that interfere with thyroid hormone metabolism or function