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Item Value
Approval req'd? No
Available Stat? No
Test code ASDN
Performed by Quest
Sendout? Yes
Method LC/MS/MS
Patient Preparation Early AM sample preferred
Collection Instructions Early AM sample preferred
Container type Red top preferred (Gold top NOT acceptable), EDTA, Light Green and Dark Green acceptable
Amount to Collect 2 mL blood
Sample type Serum or plasma
Preferred volume 1 mL serum plasma
Min. Volume 0.25 mL serum or plasma
UCSF Rejection Criteria Sample collected in Gold top
Processing notes Refrigerate. Order Quest # 17182.
Units ng/dL
Normal range Pediatric:
1-12 months 6-78 ng/dL
1-4 years 5-51 ng/dL
5-9 years 6-115 ng/dL
10-13 years 12-221 ng/dL
14-17 years 22-225 ng/dL

Premature infants (31-35 weeks) ≤ 480 ng/dL
Term infants ≤ 290 ng/dL

Tanner Stages:
II-III Males 17-82 ng/dL
II-III Females 43-180 ng/dL
IV-V Males 57-150 ng/dL
IV-V Females 7-68 ng/dL

≥ 18 year old male:
18-30 years 50-220 ng/dL
31-50 years 40-190 ng/dL
51-60 years 50-220 ng/dL

≥ 18 year old female:
Follicular 35-250 ng/dL
Mid-cycle 60-285 ng/dL
Luteal 30-235 ng/dL
Postmenopausal 20-75 ng/dL
Stability Room temperature 2 weeks, refrigerated 4 weeks, frozen at -20C 2 years
Turn around times Test performed Tuesday-Saturday. Turnaround time: 2-4 days.
Additional information To convert ng/dL to nmol/L (SI units) multiply by 0.0349. Newborn reference ranges are taken from Tietz, NW, Clinical Guide to Laboratory Tests, 2nd ed., 1990, Saunders, Philadelphia.
CPT coding 82157-90
LOINC code 1854-9
Last Updated 2/24/2014 9:29:12 AM
Entry Number 21
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