Ordering RecommendationRecommendations when to order or not order the test. May include related or preferred tests.
Preferred test to measure bone resorption and monitor response to antiresorptive therapy (eg, bisphosphonates, hormone replacement therapy) in postmenopausal women and individuals with osteoporosis.
MnemonicUnique test identifier.
CTX
MethodologyProcess(es) used to perform the test.
Quantitative Electrochemiluminescent Immunoassay
PerformedDays of the week the test is performed.
Tue, Thu, Sat
ReportedExpected turnaround time for a result, beginning when ARUP has received the specimen.
1-4 days
New York DOH Approval StatusIndicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
For patients receiving therapy with high biotin doses (e.g. greater than 5 mg/day), specimen should not be drawn until at least 8 hours after the last biotin administration.
Collect
Serum separator tube, pink (K2EDTA), or green (lithium heparin).
Specimen Preparation
Allow serum separator 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
Frozen.
Unacceptable Conditions
Hemolyzed specimens.
Remarks
Stability
After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 3 months
Reference IntervalNormal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Effective November 14, 2011
Age
Female
Male
6 months-6 years
500-1800 pg/mL
500-1700 pg/mL
7-9 years
566-1690 pg/mL
522-1682 pg/mL
10-12 years
503-2077 pg/mL
553-2071 pg/mL
13-15 years
160-1590 pg/mL
485-2468 pg/mL
16-17 years
167-933 pg/mL
276-1546 pg/mL
18-29 years
64-640 pg/mL
87-1200 pg/mL
30-39 years
60-650 pg/mL
70-780 pg/mL
40-49 years
40-465 pg/mL
60-700 pg/mL
50-69 years
40-840 pg/mL
70 years or greater
52-847 pg/mL
Postmenopausal
104-1008 pg/mL
Interpretive DataBackground information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
Compliance Category
FDA
NoteAdditional information related to the test.
Hotline History
N/A
CPT CodesThe American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
AliasesOther names that describe the test. Synonyms.
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