Total Bilirubin

CPT Code


Specimen Type


Container Type

Serum Separator Tube (SST)/Yellow


Room Temperature, 1 day; 2-8°C, 7 days; -20°C, 6 months

Handling Instructions

Allow to clot for 30 mins, centrifuge within 2 hours

Clinical Notes

Bilirubin is a dark yellow waste product that is primarily created when the body breaks down hemoglobin, which is the protein in red blood cells that carries oxygen. Bilirubin is found in bile, which is fluid in your liver that is involved in digesting food. Most bilirubin is eliminated in the feces or urine. The bilirubin test checks the health of your liver by measuring the amount of bilirubin in blood or in your urine. This can help diagnose or monitor problems related to your liver or red blood cells when the bilirubin level is too high.

Performing Lab

Principle Laboratory - Dallas
6210 N Belt Line Rd
Irving, TX 75063

Principle Laboratory - Houston
16840 Buccaneer Ln
Suite 281
Houston, TX 77058