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vitamin d, 25-hydroxy
Synonyms: 25-OH-D 
Computer Code: VITD
Specimen Collection: 5 mL blood (red or gold top tube). 
Minimum Volume: 1.0 mL 
Handling Instructions for Offsite Areas: Allow to clot, centrifuge for 20 minutes, remove serum, freeze. Min 0.2 mL serum. 
Reference Values: <20 NG/mL Deficiency 20-30 NG/mL Mild Deficiency >30 NG/mL Optimal levels >150 NG/mL Possible Toxicity Note: Season, race and dietary intake are all known to affect the normal levels of 25-OH-D. 25-OH-D values correlate well with U.V. radiation exposure. Highest levels of 25-OH-D are found during the summer months and lowest levels during the winter. Race has also been shown to significantly influence the normal levels of 25-OH-D. It has been reported that the mean plasma level of 25-OH-D in whites is greater than in blacks.  
Lab Code: CC 
Requisition: SPEC C
Test Frequency: Weekly 
Routine TAT: 7 days 
Stat TAT: 1 day 
CPT Code(s): 82306 
LCD or NCD: (LCD)  
Methodology Used: 60
See Addendum XVII

Albany Medical Center
43 New Scotland Avenue
Albany, NY, 12208
Date: 07/25/2014
Time: 02:44:37 (24hr)