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Test Name

Collagen Type I C-Telopeptide (CTx)

CPT Code(s)

82523

Methodology

Electrochemiluminescent Immunoassay

Reference Range(s)

Adult Male    
18-29 Years 87-1200 pg/mL
30-39 Years 70-780 pg/mL
40-49 Years 60-700 pg/mL
50-68 Years 87-345 pg/mL
Adult Female    
18-29 Years 60-640 pg/mL
30-39 Years 60-650 pg/mL
40-49 Years 40-465 pg/mL
Pediatric Male    
5-9 Years 574-1849 pg/mL
10-13 Years 519-2415 pg/mL
14-17 Years 435-2924 pg/mL
Pediatric Female    
5-9 Years 574-1849 pg/mL
10-13 Years 519-2415 pg/mL
14-17 Years 242-1291 pg/mL

Clinical Significance

CTx 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.

Alternative Name(s)

C-Telopeptide, Serum, CTX, Beta-Crosslaps

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 Type I C-Telopeptide (CTx)
17406