VITAMIN D,1,25-DIHYDROXY

LAB536

Collect

Serum separator tube or plain red, lithium heparin or EDTA plasma.

Specimen Preparation

Allow serum separator or plain red tube to sit for 15-20 minutes at room temperature for proper clot formation. Centrifuge and separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions

Grossly hemolyzed or lipemic specimens.

Storage/Transport Temperature

Refrigerated.

Stability (from collection to initiation)

After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 6 months

Performed

Sun-Sat

Methodology

Quantitative Chemiluminescent Immunoassay

Reported

Within 24 hours

Synonyms

  • Calcitriol
  • D, 1-25 Dihydroxy, Vitamin
  • LAB536

Additional Technical Information

Ordering Recommendations

May be useful for evaluating calcium metabolism in individuals with hypercalcemia or renal failure in addition to Vitamin D, 25-Hydroxy testing. Test is not appropriate for diagnosing vitamin D deficiency or insufficiency.

Reference Interval

19.9-79.3 pg/mL

Interpretive Data

This test is primarily indicated during patient evaluation for hypercalcemia and renal failure. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy. 

CPT Codes

82652
Collection

LAB536

Collect

Serum separator tube or plain red, lithium heparin or EDTA plasma.

Specimen Preparation

Allow serum separator or plain red tube to sit for 15-20 minutes at room temperature for proper clot formation. Centrifuge and separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions

Grossly hemolyzed or lipemic specimens.

Storage/Transport Temperature

Refrigerated.

Stability (from collection to initiation)

After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 6 months
Ordering

Performed

Sun-Sat

Methodology

Quantitative Chemiluminescent Immunoassay

Reported

Within 24 hours

Synonyms

  • Calcitriol
  • D, 1-25 Dihydroxy, Vitamin
  • LAB536

Additional Technical Information

Ordering Recommendations

May be useful for evaluating calcium metabolism in individuals with hypercalcemia or renal failure in addition to Vitamin D, 25-Hydroxy testing. Test is not appropriate for diagnosing vitamin D deficiency or insufficiency.
Result Interpretation

Reference Interval

19.9-79.3 pg/mL

Interpretive Data

This test is primarily indicated during patient evaluation for hypercalcemia and renal failure. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy. 

Administrative

CPT Codes

82652

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