Blood tests must ordered by a doctor, either a GP or consultant. You will be given a form outlining exactly which tests need performing. Blood tests for cholesterol and blood sugar are most accurate after a minimum 8 hour fast. Most other tests are non-fasting. We offer a phlebotomy (blood taking) service in the practice but charge a fee to cover costs. Alternatively, a blood test appointment may be booked in St. Michael's Hospital or St. Vincent’s University Hospital at no cost. The doctors blood request form must be brought to the appointment.