Allergy Specific IgE and RAST Tests

Allergy Specific IgE tests are blood tests which measure the antibodies to a specific allergen in the blood.

They are more expensive than Skin Prick Tests and are only partially funded by Medicare which makes them even more expensive to the patient.  However, its value arises in situations where SPT’s may not be appropriate.  For example this could be because of:

  • Risk or because the patient cannot stop taking antihistamines.
  • Patient has certain conditions such as severe eczema which means there is no “normal skin” on which to do the skin testing.
  • SPT’s are not easily available, for example with Telehealth interviews for rural patients but in this case carefully going over the history will narrow the potential tests to minimise the cost.