Alkaline Phosphatase (ALK)

Test Code

LAB112

Alias/See Also

1231100064

CPT Codes
84075

Includes

ALKALINE PHOSPHATASE

Preferred Specimen

CLINIC COLLECTIONS: Green Lithium Heparin tube (Gel separator preferred)

Minimum Volume

CLINIC COLLECTIONS: 0.5 mL plasma

Instructions

CLINIC COLLECTIONS: Collect 0.5 ml plasma in Green Lithium Heparin tube (Gel separator preferred). Must be spun within 2 hours after collection. If no gel separator, plasma must be pulled off cells within 2 hours.

If collecting with AST, ALT, VD25, K+, or LDH, label routes to Gold/SST. Collect 1.0 mL of serum in Gold/SST. Must be spun within 2 hours after collection.

Transport Temperature

Refrigerated

Specimen Stability

Room temperature (20 to 25°C): 7 days
Refrigerated (2 to 8°C): 7 days
Freezer (-20°C): 2 months

Methodology
Abbott Alinity

Reference Range

Males:
0-365 Days: 110-300 IU/L
1-4 Years: 145-320 IU/L
4-7 Years: 150-380 IU/L
7-10 Years: 175-420 IU/L
10-12 Years: 135-530 IU/L
12-14 Years: 200-495 IU/L
14-16 Years: 130-525 IU/L
16-20 Years: 65-260 IU/L
20 Years and above: 40-150 IU/L
Females:
0-365 Days: 110-300 IU/L
1-4 Years: 145-320 IU/L
4-7 Years: 150-380 IU/L
7-10 Years: 175-420 IU/L
10-12 Years: 130-560 IU/L
12-14 Years: 105-420 IU/L
14-16 Years: 70-230 IU/L
16-20 Years: 50-130 IU/L
20 Years and above: 40-150 IU/L

Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY LABORATORY

Last Updated: August 26, 2026

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.