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Test Code ALP Alkaline Phosphatase, Plasma or Serum

Additional Codes

  • Expanse Test Name: Alkaline Phosphatase
  • Medinet Ref Code:ALKP
  • OV Code:CHEM*ALP

Performing Laboratory

St. Lukes Hospital Laboratory

Methodology

Transphosphorylation of  p-Nitrophenyl Phosphate

Specimen Requirements

 

 

Submit only 1 of the following specimens:
 
PlasmaDraw blood in a green-top (lithium heparin) plasma gel tube(s). Spin down and send 1 mL of lithium heparin plasma refrigerated.

  • Separated specimens may be stored for up to 8 hours at 25°C or for up to 7 days at 2 - 8°C.
  • Freeze samples for up to 6 months at -20°C.


Note:  1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).
 
Serum
Draw blood in a serum gel tube(s). Spin down and send 1 mL of serum refrigerated.
Note:  1. Indicate serum on request form.
2. Label specimen appropriately (serum).

 

  • Separated specimens may be stored for up to 8 hours at 25°C or for up to 7 days at 2 - 8°C.
  • Freeze samples for up to 6 months at -20°C.

Unspun specimens must be transported at ambient temperature and arrive to the laboratory within one hour of draw.

Reference Values

Males

<13 years:  <455 U/L

>13 years:  45-122 U/L

Females

<13 years:  <455 U/L

>13 years:  32-104 U/L

Interfering Substances:

EDTA when present at 200 mg/dL depresses the alkaline phosphatase results by 80 U/L at 80 U/L of alkaline phosphatase activity. Sodium citrate at 30 mg/dL increases the alkaline phosphatase activity by 25 U/L at a concentration of 55 U/L.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

CPT: 84075

LOINC: 6768-6