On your lab requisition: Labcorp “Cancer Antigen (CA) 125” (test no. 002303)
The short answer
A tumor marker used to monitor ovarian cancer treatment and screen high-risk women, measured from a standard blood draw. At TestWell it costs $34.99 plus a $6 lab processing fee, needs no fasting, and results post in 2–4 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Labcorp.
Hospital Lab
$200
cash pay
Other Labs
$45
+ lab fees
TestWell
$34.99
+ $6 lab processing fee
CA-125 is a protein found on the surface of ovarian cancer cells and some normal tissues. Elevated levels can indicate ovarian cancer, especially in postmenopausal women. It is primarily used to monitor treatment response and recurrence rather than initial screening in the general population. CA-125 can also be elevated in endometriosis, pelvic inflammatory disease, liver disease, and during menstruation or pregnancy.
Cancer Antigen 125 — a protein elevated in ~80% of ovarian cancers. Used for monitoring known ovarian cancer treatment response and surveillance, NOT recommended as a general screening test in average-risk women.
Women already diagnosed with ovarian cancer (monitoring treatment + recurrence), BRCA1/2 mutation carriers (selective screening), women with persistent pelvic mass on imaging to help stratify malignancy risk. NOT recommended for asymptomatic average-risk screening.
Sample Type
Blood draw
Fasting
Not required
Results In
2–4 business days
Performed At
Labcorp
Your CA-125 (Ovarian Cancer Marker) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–4 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you. Already have results? Analyze them with your AI assistant against our physician-reviewed ranges.
No fasting required.
A CA-125 (Ovarian Cancer Marker) test costs $34.99 at TestWell — $40.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Hospital outpatient labs typically bill around $200.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Labcorp) | $34.99 | $40.99 | Includes the one $6 lab processing fee, charged once per order |
| Hospital outpatient lab, self-pay (typical) | $200.00 | $200.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 29256 · Labcorp test no. 002303. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
No, unless you have a known BRCA1/2 mutation or other high-risk genetic syndrome. CA-125 has a high false-positive rate in average-risk women (elevated by endometriosis, fibroids, pregnancy, inflammation) and randomized trials show no mortality benefit from screening average-risk women. USPSTF specifically recommends against it.
Most labs use under 35 U/mL as normal. But 1-2% of healthy women have elevated CA-125 without cancer. Trends over time matter more than single values — a stable mildly-elevated CA-125 is rarely concerning; a rapidly rising CA-125 in someone with prior ovarian cancer is a red flag for recurrence.
(1) Monitoring response to chemotherapy in known ovarian cancer (numbers should fall during effective treatment). (2) Surveillance for recurrence after initial cancer treatment. (3) Combined with transvaginal ultrasound to estimate malignancy risk in a woman with a known pelvic mass (the ROMA score).
On TestWell, CA-125 is $34.99. Quest Direct lists the same test at $45, walk-in hospital labs typically bill $150-200 without insurance.
No fasting required. Avoid testing during your menstrual period — menstruation can transiently elevate CA-125 and produce a false-positive.
Endometriosis, uterine fibroids, pelvic inflammatory disease, pregnancy (first trimester), liver disease, recent abdominal surgery, and even ovulation can transiently elevate CA-125. This is why it's not a good screening test in average-risk women — the false-positive rate is too high.
Yes. The CA-125 (Ovarian Cancer Marker) test measures cancer antigen 125, the blood marker used to monitor ovarian cancer treatment and screen high-risk women. It is also searched as ovarian cancer marker test, CA 125 tumor marker. On TestWell it is $34.99 at Labcorp — no doctor's visit or insurance required, results in 2–4 business days.
A CA125 blood test costs $34.99 out of pocket at TestWell ($40.99 all-in with the $6 per-order lab processing fee) — it is sold here as the CA-125 (Ovarian Cancer Marker), with no doctor's visit or insurance required. Results in 2–4 business days.
CA-125 (Ovarian Cancer Marker) test results are typically ready in 2–4 business days after your draw at Labcorp. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation.
Order the CA-125 (Ovarian Cancer Marker) test online from TestWell for $34.99 (plus a $6 per-order lab processing fee) — no doctor's visit, referral or insurance needed. A licensed physician authorizes the order, then you walk into any Labcorp patient service center near you for the draw (the lab locator on our site lists the closest ones by ZIP code), and results arrive in 2–4 business days.
The CPT code for a CA-125 (Ovarian Cancer Marker) test is 86304. You can order it from TestWell for $34.99 — no doctor's visit or insurance required, with results in 2–4 business days.
The CA-125 (Ovarian Cancer Marker) test is Quest Diagnostics test code 29256, Labcorp test number 002303 ("Cancer Antigen (CA) 125") (CPT 86304). TestWell orders it under those codes for $34.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 2–4 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$34.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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