At a Glance
Why Get Tested?
When to Get Tested?
In adults, a blood sample drawn from a vein in the arm; in newborns, a blood sample from a heelstick; non-invasive technology is available in some health care facilities that will measure bilirubin by using an instrument placed on the skin (transcutaneous bilirubin meter)
Test Preparation Needed?
Fasting requirements vary by laboratory; ask your lab or health care provider for instructions.