COLLAGEN TYPE 1 C-TELOPEPTIDE (CTx) - Health Lab

Collagen Type I C-Telopeptide
LAB9016

82523  

1.0 mL serum

Plain Red (no additive/gel)

0.5 mL serum

Patient prep: A minimum of 12 hours fasting is required. Fasting morning collection 8-10 am. (Diurnal variations cause elevated levels at night).

Allow specimen to completely clot. Centrifuge for 15 minutes and transfer the separated serum to a plastic transfer tube. Specify specimen type (serum) on transfer tube. Freeze serum as soon as possible.

Frozen

Room temperature: 16 hours
Refrigerated: 72 hours
Frozen: 90 days

Moderate to gross hemolysis

Grossly lipemic

Grossly icteric

Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.

Set up: Tues-Sat; Report available: 2-4 days

Immunoassay (IA)

Quest Diagnostics, Chantilly; #17406

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.

Updated: 08/05/2026

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

>49 Years            Not established

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

The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.