Days Set Up
Monday - Saturday
Analytic Time

2 - 4 days

Soft Order Code
CTX

Test Updated:

Synonyms

C-terminal collagen crosslinks
B-CTx
C-Telopeptides, Serum
C-Telopeptide, Beta Cross-Linked, Serum

Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

Electrochemiluminescence Immunoassay

Test Usage

An aid in monitoring antiresorptive therapies (eg, bisphosphonates and hormone replacement therapy) in postmenopausal women treated for osteoporosis and individuals diagnosed with osteopenia. An adjunct in the diagnosis of medical conditions associated with increased bone turnover

Reference Range

MALES: <5 yrs 242-1292 pg/mL; 5-9 yrs: 351-1532 pg/mL; 10-15 yrs: 447-2457 pg/mL; 16-17 yrs: 478-1666 pg/mL; 18-30 yrs: 120 - 946 pg/mL; 31-50 yrs: 93 - 630 pg/mL; 51-70 yrs: 35 - 836 pg/mL; >70 yrs: not established. FEMALES: <5 yrs:347-1508 pg/mL; 5-9 yrs: 383-1556 pg/mL; 10-15 yrs: 311-1776 pg/mL; 16-17 yrs: 146-1266 pg/mL; Premenopausal: 25 - 573 pg/mL; Postmenopausal: 104 - 1008 pg/mL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Collect specimen in an SST or red top tube from a fasting patient.

Collection Offsite

Collect specimen in an SST or red top tube from a fasting patient. Centrifuge, aliquot serum into a plastic vial and freeze (preferred) or refrigerate up to 3 days.

Red Top Tube
Yellow Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.8 mL serum

Billing Information

CPT Code
82523
Pro Fee Code
 
LOINC
41171-0

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.