Ordering RecommendationRecommendations when to order or not order the test. May include related or preferred tests.
MnemonicUnique test identifier.
NTX
MethodologyProcess(es) used to perform the test.
Quantitative Chemiluminescent Immunoassay
PerformedDays of the week the test is performed.
Tue-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 monitoring therapy, a baseline specimen should be collected prior to initiation of therapy. Subsequent specimens for comparison should be collected at the same time of day as the baseline specimen.
Collect
Second-morning void or 24-hour urine. Refrigerate during collection. Collect without preservative.
Specimen Preparation
Transfer a 1 mL aliquot of urine from a well-mixed, second-morning void or 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature
Frozen.
Unacceptable Conditions
Specimens contaminated with blood or extensive hemolysis.
Remarks
Stability
Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 years
Reference IntervalNormal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Age
Male
Female
7-9 years
167-578 nM BCE/mM creatinine
201-626 nM BCE/mM creatinine
10-12 years
152-505 nM BCE/mM creatinine
173-728 nM BCE/mM creatinine
13-15 years
103-776 nM BCE/mM creatinine
38-515 nM BCE/mM creatinine
16-17 years
34-313 nM BCE/mM creatinine
20-144 nM BCE/mM creatinine
18 years and older
21-83 nM BCE/mM creatinine
Premenopausal
17-94 nM BCE/mM creatinine
Postmenopausal
26-124 nM BCE/mM creatinine
Interpretive DataBackground information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
NTx Units = nM BCE/mM creatinine
A decrease of 30-40% from the NTx baseline after three months of therapy is a typical response to anti-resorptive therapy.
NTx = Cross-linked N-telopeptide of Type I Collagen BCE = Bone Collagen Equivalent
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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