Sign in →

Test Code DOH Vitamin D, 25-Hydroxy

Specimen Type

Blood

Container

Red top

Preferred Volume

4 mL

Offsite Collection Instructions

Fasting (10 or more hours) is recommended but not required.

UCMC Collection Instructions

Fasting (10 or more hours) is recommended but not required.

Availability

Monday – Friday, one run per day

Turnaround Time

24 – 72 hrs

STAT Availability

Not Available

Test Usage

used in the assessment of vitamin D sufficiency

Test Methodology

radioimmunoassay

Additional Information

The measurement of 25-OH-D is becoming increasingly important in the management of patients with various disorders of calcium metabolism associated with rickets, neonatal hypocalcemia, pregnancy, nutritional and renal osteodystrophy, hypoparathyroidism, and postmenopausal osteoporosis

CPT Code

82306

Test Includes

quantitative determination of total  25-hydroxyvitamin D

Critical Results

None

Reference Range

10 – 52 ng/mL
Deficiency:  <10 ng/mL
Borderline: 10 15 ng/mL
Winter:    Mean +/ SD: 16 ± 7 ng/mL
Summer:  Mean ± SD: 29 ± 12 ng/mL
 
Factors such as UV exposure, season, race ,and dietary intake are all known to affect levels of 25-OH-D in humans. 

Minimum Volume

2 mL

Fee Code

43110