Vitamin D Total
Test Code
VITDT
Description
Measures Vitamin D levels. Measurement of serum 25-OH vitamin D concentrations provide a good index of circulating vitamin D activity in patients not suffering from renal disease. Lower than normal 25-OH vitamin D levels can result from a dietary deficiency, poor absorption of the vitamin or impaired metabolism of the sterol in the liver. A 25-OH vitamin D deficiency can lead to bone diseases such as rickets and osteomalacia. Greater than normal levels can lead to hypercalcemia.
Collect
Plain red top or SST tube.
Pediatric Collection
Minimum volume: 0.3mL serum
Unacceptable Conditions
Grossly lipemic or hemolyzed specimens, more than three freeze/thaw cycles
Storage Transport Temp
Offsite: Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Stability after cell separation:
72 hours at RT (15-25°C)
12 days refrigerated at 2-8°C
Indefinitely if frozen at ≤ -20°C
Performed
Mon-Fri
Methodology
Chemiluminescent Magnetic Immunoassay (CLIA)
Turnaround Time
4 hour routine, 1 hour STAT
Department
Core Lab
Synonyms
Vit D;Vitamin D;Ergocalciferol;cholecalciferol;Access 25(OH) Vitamin D Total;Rickets;VITDT
Study Offerings
Not offered
Reference Interval
Deficient: Less than 20 ng/dL
Insufficient: 20-29 ng/dL
Sufficient: 30-100 ng/dL
Upper Safety Limit: Greater than 100 ng/dL
CPT Code
82306
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared