Alkaline Phosphatase CPT: 84075

Special Instructions

Values obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient’s course of therapy. This procedure does not provide serial monitoring; it is intended for one-time use only.

Expected Turnaround Time

Within 1 day

Specimen Requirements


Serum (preferred) or plasma.


2 mL

Minimum Volume

0.5 mL


Red-top tube, gel-barrier tube, or green-top (heparin) tube.


Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.

Storage Instructions

Room temperature.

Stability Requirements

Temperature Period
Room Temperature 14 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw/ cycles Stable x 3

Patient Information

To screen for or monitor treatment for a liver or bone disorder.

As part of a routine liver panel or when you have symptoms of a liver or bone disorder.

A blood sample drawn from a vein in your arm.

You may be instructed to have your blood drawn in the morning and/or fast for 12 hours before the test; in this case, only water is allowed. Follow any instructions from your healthcare practitioner and/or from the laboratory performing the test.

Fasting overnight preferred but not required.