Protein, Total

Protein, Total CPT: 84155

Expected Turnaround Time

Within 1 day

Specimen Requirements


Serum (preferred) or plasma.


1 mL

Minimum Volume

0.5 mL


Gel-barrier tube, transport tube, green-top (heparin) tube, or lavender-top (EDTA) tube.


Separate serum or plasma from cells within four hours of collection.

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements

Patient Information

As part of a general health checkup, to determine your nutritional status or to help diagnose certain liver and kidney disorders as well as other diseases.

When you have a routine health exam; when you experience unexpected weight loss or fatigue, or when your healthcare practitioner thinks that you could have symptoms of a liver or kidney disorder.

A blood sample drawn from a vein or by fingerstick or, in the case of newborns, by heelstick.