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Test Name

Collagen Cross-Linked N-Telopeptide (NTx), Urine

CPT Code(s)

82523, 82570

Includes

Creatinine

Methodology

Enhanced Chemiluminescence

Reference Range(s)

Collagen Cross-Linked N-Telopeptide (NTx), Random Urine

Male  
  18-29 Years 12-99 nmol BCE/mmol creat
  30-59 Years 9-60 nmol BCE/mmol creat
Female  
  Premenopausal 4-64 nmol BCE/mmol creat
Results are primarily used for monitoring the response to therapy. A value within the premenopausal reference range does not rule out osteoporosis nor the need for therapy.
Creatinine, Random, Urine
≤6 Months 2-32 mg/dL
7-11 Months   2-36 mg/dL
1-2 Years 2-128 mg/dL
3-8 Years 2-149 mg/dL
9-12 Years 2-183 mg/dL
>12 Years Male 20-370 mg/dL
>12 Years Female 20-320 mg/dL

Clinical Significance

NTx is useful to assess bone resorption in patients with metabolic bone disease. The test is also useful in monitoring therapy to slow or halt osteoporotic bone loss. A decline of 30% or more of NTx over a six-month period suggests effective therapy.

Alternative Name(s)

Collagen Cross-Linked N-Telopeptide, N-Telopeptide or NTx

To view specimen requirements and codes please Select a regional laboratory.

Not sure which laboratory serves your office? Call us 866-MYQUEST (866-697-8378)

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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Collagen Cross-Linked N-Telopeptide (NTx), Urine
36167