Selenium, Random Urine with Creatinine

Test Code

CPT Codes
82570, 84255


Preferred Specimen
2 mL of a random urine, collected in an acid-washed plastic leak-proof container

Minimum Volume
1 mL

Collect urine in an acid-washed, plastic, leak-proof container. Acidify with Hydrochloric or Nitric Acid (1 mL of concentrated acid for each 100 mL of urine). Avoid worksite collection.

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 5 days
Refrigerated: 14 days
Frozen: 30 days

Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

Setup Schedule
Set up: Tues, Fri; Report available: 3 days

Reference Range
Selenium, Urine <160 mcg/L
Creatinine, Random Urine  
≤6 Months 2-28 mg/dL
7- 11 Months 2-31 mg/dL
1-2 Years 2-110 mg/dL
3-8 Years 2-130 mg/dL
9-12 Years 2-160 mg/dL
>12 Years Male 20-320 mg/dL
>12 Years Female 20-275 mg/dL
Selenium/Creatinine Ratio <140.0 mcg/g creat

Clinical Significance
Selenium is considered an essential trace element. It enters the food chain through plants. Selenium plays an important role in the control of thyroid hormone metabolism. Selenium deficiency may cause reduced growth rates, owing to a feedback response, which lowers tri-iodothyronine-mediated synthesis of growth hormone in the pituitary, while a combined deficiency of selenium and iodine exacerbates hypothyroidism. Selenium is important for proper reproductive performance.

Performing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386

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.