CA-125 test cost in Seattle, WA
In Seattle-Tacoma-Bellevue, WA, 17 hospitals list a cash price for CA-125 blood test (ovarian cancer marker): from $14.10 to $208.00, with a median of $108.96. The lowest listed price is at Overlake Medical Center & Clinics — $94.86 less than the median here. Across Washington, the median is $123.01 at 57 hospitals.
- The median here, $108.96, is 6% below the US median of $115.70.
- That is 5.2× Medicare's 2026 national rate for the same service ($20.81).
- Every hospital here lists a cash price below its full list price.
Cash prices at 17 facilities across 14 cities for code 86304, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 11, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Sep 30, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Seattle-Tacoma-Bellevue, WA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Overlake Medical Center & Clinics lowest Bellevue, WA · (425) 688-5000 Hc Cancer Antigen 125 File of Apr 1, 2026 · source file | $14.10 | $28.20 | — | 50% |
| Virginia Mason Medical Center Seattle, WA · (206) 223-6600 IMMUOASSAY,TUMOR CA 125 File of Jan 1, 2026 · source file | $84.66 | $166.00 | $99.60–$132.80 | 49% |
| Saint Clare Hospital Lakewood, WA · (253) 588-1711 HC CA 125 OVARIAN CANCER AG File of Sep 30, 2026 · source file | $100.79 | $349.46 | $20.54–$262.10 | 71% |
| St Anthony Hospital Gig Harbor, WA · (253) 530-2050 HC CA 125 OVARIAN CANCER AG File of Sep 30, 2026 · source file | $106.28 | $349.46 | $20.54–$262.10 | 70% |
| Highline Medical Center Burien, WA · (206) 431-5237 HC CA 125 OVARIAN CANCER AG File of Sep 30, 2026 · source file | $106.38 | $349.46 | $20.54–$314.52 | 70% |
| Snoqualmie Valley Hospital Snoqualmie, WA · (425) 831-2300 Facility Fee HC CANCER ANTIGEN 125 File of Apr 14, 2026 · source file | $106.57 | $183.74 | $20.39–$169.04 | 42% |
| St Francis Community Hospital Federal Way, WA · (253) 944-8100 HC CA 125 OVARIAN CANCER AG File of Sep 30, 2026 · source file | $107.46 | $349.46 | $20.54–$262.10 | 69% |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC IMMUNOASSAY TUMOR ANTIGEN QUANTITATIVE CA 125 CDM File of Apr 1, 2026 · source file | $108.96 | $227.00 | — | 52% |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC IMMUNOASSAY TUMOR ANTIGEN QUANTITATIVE CA 125 CDM File of Apr 1, 2026 · source file | $108.96 | $227.00 | — | 52% |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC IMMUNOASSAY TUMOR ANTIGEN QUANTITATIVE CA 125 CDM File of Apr 1, 2026 · source file | $108.96 | $227.00 | — | 52% |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC IMMUNOASSAY TUMOR ANTIGEN QUANTITATIVE CA 125 CDM File of Apr 1, 2026 · source file | $108.96 | $227.00 | — | 52% |
| St Joseph Medical Center Tacoma, WA · (253) 627-4101 HC CA 125 OVARIAN CANCER AG File of Feb 28, 2026 · source file | $111.29 | $336.02 | $20.81–$252.02 | 67% |
| Providence Regional Medical Center Everett Everett, WA · (425) 261-2000 HC IMMUNOASSAY TUMOR ANTIGEN QUANTITATIVE CA 125 CDM File of Apr 1, 2026 · source file | $118.04 | $227.00 | — | 48% |
| Valley Medical Center Renton, WA · (425) 228-3450 Immunoassay Tumor Antigen Quantitative Ca 125 File of Mar 12, 2026 · source file | $127.40 | $182.00 | — | 30% |
| St Elizabeth Hospital Enumclaw, WA · (360) 825-2505 HC CA 125 OVARIAN CANCER AG File of Sep 30, 2026 · source file | $128.33 | $349.46 | $20.54–$314.52 | 63% |
| Kaiser Permanente Central Hospital Seattle, WA · (206) 326-3000 "IMMUNOASSAY FOR TUMOR ANTIGEN, CA 125" File of Apr 1, 2026 · source file | $168.80 | $211.00 | $16.00–$56.00 | 20% |
| Cascade Valley Hospital Arlington, WA · (360) 435-2133 HC IMMUNOASSAY TUMOR CA 125 File of Mar 26, 2026 · source file | $208.00 | $260.00 | $22.10–$234.00 | 20% |
Outpatient: lowest $14.10, median $108.96, highest $208.00 — a 14.8× difference within the same market.
As an inpatient, the same code is billed by 18 facilities here, median $108.96. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 9 of 10 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What CA-125 test is, what the price covers and why prices differ: CA-125 test explained.