CPT 4 Code: 84300

Test Order Mnemonic: NA BF

Lab: Clinical Chemistry

Request Form: Routine Chemistry Form 1

Storage Instructions: Refrigerate specimen at 2-8°C.

Availability: Samples are received 24 hours per day at Sample Management, Room 5.136 McCullough.

Turnaround Time: Routine: 4 hours; STAT: 1 hour

Special Instructions: State source of fluid on request form.

Specimen: Body fluid

Volume: 5 Ml

Minimum Volume: 1 mL

Container: Plain tube or plastic cup with tight-fitting lid.

Test Method: Potentiometric

Reviewed/revised April 2007 by P. Harris