--- title: CTx Bone Turnover Test (C-Telopeptide) Test type: test id: ctx-c-telopeptide url: "https://www.test-well.com/tests/ctx-telopeptide-test" price_usd: 39.99 lab_fee_usd: 6 all_in_usd: 45.99 cpt: 82523 category: General Health sample: Blood draw fasting_required: true results_in: "3–5 business days" labs: - Quest - Labcorp - BioReference orderable: true reviewed_at: 2026-10-19 order_url: "https://www.test-well.com/cart?add=ctx-telopeptide-test&utm_source=ai_agent&utm_medium=markdown" --- # CTx Bone Turnover Test (C-Telopeptide) Test > CTx Bone Turnover Test (C-Telopeptide) measures C-Telopeptide (CTx), Serum from a standard blood draw. At TestWell it costs $39.99 plus a $6 lab processing fee, requires an 8–12 hour fast, and results post in 3–5 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp. **Also known as:** CTx Blood Test, C-Telopeptide Test, Beta-CrossLaps Test, Bone Resorption Marker Test ## Key facts | Fact | Value | | --- | --- | | Price | $39.99 + $6 lab processing fee per order ($45.99 all-in for this test alone) | | CPT code | 82523 | | Sample | Blood draw | | Fasting | Yes — 8–12 hours | | Results | 3–5 business days | | Labs | Quest Diagnostics, Labcorp, BioReference (NY & NJ) | | Biomarkers measured | 1 | | Physician authorization | Included — no doctor's visit, referral or insurance needed | | Payment | Card, HSA or FSA; cash-pay only (no insurance billing) | ## What does the CTx Bone Turnover Test (C-Telopeptide) test tell you? Measures C-telopeptide (CTx), a fragment released when bone is broken down — used to see how fast you are losing bone and whether osteoporosis treatment is working. Bone is constantly remodelled: old bone is resorbed and new bone laid down. When bone is resorbed, fragments of type I collagen called C-terminal telopeptides (CTx, also reported as β-CrossLaps) are released into the blood. A high CTx means resorption is running fast — as it does after menopause, with hyperparathyroidism, hyperthyroidism, long-term steroid use, or vitamin D deficiency — and a falling CTx is the earliest sign that an anti-resorptive treatment such as a bisphosphonate or denosumab is working, months before a DEXA scan can show a change. Dentists also use it before oral surgery in people on long-term bisphosphonates. Because CTx has a strong daily rhythm (highest in the early morning) and drops after eating, it should be drawn fasting and early, and always at the same time of day for comparisons. Reference ranges differ by sex and, in women, by menopausal status; the laboratory prints the one that applies to you. CTx does not measure bone density — it measures the rate of change — so it complements rather than replaces a DEXA scan. **Clinical use:** General health testing provides a baseline snapshot of organ function, metabolism, and key biomarkers — useful for annual checkups, preventive care, and tracking changes over time. ## Who should order it? Adults wanting a routine wellness baseline, anyone re-engaging with healthcare after a gap, and people tracking the impact of lifestyle or medication changes. ## Biomarkers measured - C-Telopeptide (CTx), Serum ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $39.99 | $45.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | Labcorp | $59.99 | $65.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | BioReference (NY & NJ) | $79.99 | $85.99 | New York and New Jersey orders route here automatically | Rhode Island is not served. Prices are identical online and in the lab; no draw fee or physician fee is added. ## How much does a CTx Bone Turnover Test (C-Telopeptide) cost? A CTx Bone Turnover Test (C-Telopeptide) costs $39.99 at TestWell — $45.99 all-in, since the $6 lab processing fee is charged once per order and there is no draw or physician fee. Hospital outpatient labs typically bill around $220.00 self-pay. With insurance you pay your plan's negotiated rate against your deductible; TestWell's price is fixed before the draw and HSA/FSA-eligible. | Where you order | Price | One test, all-in | Notes | | --- | --- | --- | --- | | TestWell (drawn at Quest) | $39.99 | $45.99 | Includes the one $6 lab processing fee, charged once per order | | TestWell (drawn at Labcorp) | $59.99 | $65.99 | Labcorp's own cost for this test is higher; same order, same portal, same physician review | | TestWell (drawn at BioReference — New York & New Jersey) | $79.99 | $85.99 | New York and New Jersey orders route to BioReference; Quest Health and Labcorp OnDemand don't take self-ordered draws in those states | | Hospital outpatient lab, self-pay (typical) | $220.00 | $220.00 | Reference figure; hospital charges vary widely by facility and are often higher | ## How do you prepare? Fast overnight (water is fine) and have your blood drawn in the morning, ideally before 10 a.m. — CTx falls after food and across the day. For follow-up tests, repeat at the same time of day at the same lab. ## Related conditions - Routine health screening (Z00.00) ## Common questions about the CTx Bone Turnover Test (C-Telopeptide) test ### How long do CTx Bone Turnover Test (C-Telopeptide) results take? Most CTx Bone Turnover Test (C-Telopeptide) results are available in 3–5 business days after your specimen arrives at the lab. You'll get an email the moment results are ready, with everything viewable in your TestWell portal. ### What sample is collected for the CTx Bone Turnover Test (C-Telopeptide)? Blood draw. A standard venous blood draw, collected at any Quest, Labcorp or BioReference patient service center — walk in with the requisition we email you, no appointment needed at most locations; fast 8–12 hours beforehand (water is fine). ### How much does the CTx Bone Turnover Test (C-Telopeptide) cost without insurance? On TestWell, the CTx Bone Turnover Test (C-Telopeptide) is $39.99. Walk-in hospital labs typically bill $220 or more without insurance. Insurance is not required — pay one all-in price. ### Do I need to fast before the CTx Bone Turnover Test (C-Telopeptide)? Yes — fast overnight (water is fine) and have your blood drawn in the morning, ideally before 10 a.m. — CTx falls after food and across the day. For follow-up tests, repeat at the same time of day at the same lab. Following the prep instructions gives you the most accurate result. ### Where can I get the CTx Bone Turnover Test (C-Telopeptide) done? The CTx Bone Turnover Test (C-Telopeptide) is available at Quest and Labcorp patient service centers nationwide. Order online at TestWell, pick your preferred lab, and we'll generate a digital requisition for the location closest to you. ### What is the CPT code for a CTx Bone Turnover Test (C-Telopeptide)? CPT 82523. That is the billing code Quest, Labcorp and hospital laboratories all use for a CTx Bone Turnover Test (C-Telopeptide), so it is the number to match on an explanation of benefits, a doctor's order or a price list — the same code, the same test, whichever lab draws it. You do not need the code to order: TestWell sells the CTx Bone Turnover Test (C-Telopeptide) for $39.99 with the physician order included, no insurance required, and results in 3–5 business days. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=ctx-telopeptide-test&utm_source=ai_agent&utm_medium=markdown 2. Create an account or sign in, confirm your state and preferred lab, pay by card, HSA or FSA. 3. A licensed physician authorizes the order (usually within minutes); the requisition arrives by email. 4. Walk into any Quest Diagnostics, Labcorp, BioReference (NY & NJ) patient service center — no appointment needed at most sites. 5. Results post to your TestWell portal in 3–5 business days with reference ranges and flags. ## Related - [ApoE Alzheimer's Risk](https://www.test-well.com/tests/apoe-alzheimers-risk) — $184.99 - [Blood Type Test](https://www.test-well.com/tests/blood-type) — $29.99 - [Creatine Kinase (CK)](https://www.test-well.com/tests/creatine-kinase-test) — $18.99 - [How Your Body Processes Medications Test](https://www.test-well.com/tests/pharmacogenomics-panel) — $1199.99 - [LDH (Lactate Dehydrogenase)](https://www.test-well.com/tests/ldh-test) — $19.99 - [All General Health tests](https://www.test-well.com/tests/category/general-health) - [Full test directory](https://www.test-well.com/tests/directory) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-10-19. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/ctx-telopeptide-test Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.