--- title: CA-125 Test type: biomarker url: "https://www.test-well.com/biomarkers/ca-125" also_known_as: - ca-125 - ca 125 - cancer antigen 125 category: Heart Health units: - U/mL order_price_usd: 34.99 order_item: CA-125 (Ovarian Cancer Marker) order_url: "https://www.test-well.com/tests/ca-125-test" reviewed_at: 2026-09-05 --- # CA-125 > CA-125 is measured with a standard blood draw; no fasting is needed. A typical reference range is 0.000 – 35.0 U/mL. At TestWell it's $34.99 all-in as CA-125 (Ovarian Cancer Marker), results in 2–4 business days, drawn at Labcorp. An out-of-range result is a prompt to look closer, not a diagnosis. Also known as: ca-125, ca 125, cancer antigen 125. ## Key facts | Fact | Value | | --- | --- | | Units | U/mL | | Sample | Blood draw | | Fasting | Not required | | Results | 2–4 business days | | Price | $34.99 | | Labs | Labcorp | ## What does CA-125 measure? A protein elevated in many ovarian cancers. Also rises with benign conditions like endometriosis or menstruation. ## What is the normal range for CA-125? | Population | Reference range | | --- | --- | | age 18+ | 0.000 – 35.0 U/mL | Reference intervals differ slightly between labs; the range printed on your report is the one to interpret against. Ranges are usually set so 95% of healthy people fall inside them. ## What does a high CA-125 mean? Most often monitored in known ovarian cancer. Many benign causes — interpretation requires clinical context. ## How do you get tested for CA-125? | Order | Type | Price | Includes | | --- | --- | --- | --- | | [CA-125 (Ovarian Cancer Marker)](https://www.test-well.com/tests/ca-125-test) | Single test | $34.99 | This marker | | [Women's Cancer Screening Panel](https://www.test-well.com/tests/womens-cancer-screening-panel) | Panel | $299.99 | 12 tests | ## Quest vs Labcorp vs BioReference | Lab | Available | Price | Notes | | --- | --- | --- | --- | | Quest Diagnostics | No | — | Not offered through Quest for this test. | | Labcorp | Yes | $34.99 | Choose Labcorp at checkout; walk-in patient service centers in every state TestWell serves outside NY and NJ. | | BioReference (NY & NJ) | No | — | Not available in NY/NJ for this test. | - [What a high CA-125 means (causes, symptoms, next steps)](https://www.test-well.com/biomarkers/ca-125/high) ## Common questions about CA-125 ### Do I need a doctor's order to test my ca-125? No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor. ### How long does it take to get CA-125 results? Most CA-125 results are available in 1–3 business days after your specimen arrives at the lab. You'll get an email the moment your results are ready, with everything viewable in your TestWell portal. ### How much does a CA-125 test cost? Our CA-125 (Ovarian Cancer Marker) starts at $34.99. That's the all-in price — no copays, no insurance hoops, no surprise bills. HSA and FSA cards are accepted. ### Do I need to fast before my CA-125 test? Fasting is not required for the CA-125 test. You can have your blood drawn any time of day. ### Which lab will process my CA-125 test? Your test will be processed by Quest Diagnostics, Labcorp, or BioReference depending on which is closest to you and which lab carries the test. All three are CLIA-certified and trusted by hospitals nationwide. You'll choose your lab during checkout from 4,000+ locations. ## Sources - [Mayo Clinic Labs](https://www.mayocliniclabs.com/test-catalog/overview/9289) - [MedlinePlus (NIH) — CA-125 Blood Test (Ovarian Cancer)](https://medlineplus.gov/lab-tests/ca-125-blood-test-ovarian-cancer/) ## Related biomarkers - [Apolipoprotein B](https://www.test-well.com/biomarkers/apolipoprotein-b) - [Lipoprotein(a)](https://www.test-well.com/biomarkers/lipoprotein-a) - [NT-proBNP](https://www.test-well.com/biomarkers/nt-probnp) - [Homocysteine](https://www.test-well.com/biomarkers/homocysteine) - [LDL Particle Number](https://www.test-well.com/biomarkers/ldl-particle-number) - [Small LDL Particle](https://www.test-well.com/biomarkers/small-ldl-particle) - [Reference range lookup tool](https://www.test-well.com/tools/reference-range-lookup) - [Lab unit converter](https://www.test-well.com/tools/lab-unit-converter) - [All biomarkers](https://www.test-well.com/biomarkers) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-05. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/biomarkers/ca-125 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.