PTT blood test cost in Seattle, WA
In Seattle-Tacoma-Bellevue, WA, 18 hospitals list a cash price for partial thromboplastin time (PTT) clotting test: from $6.02 to $112.60, with a median of $35.85. The lowest listed price is at Overlake Medical Center & Clinics — $29.83 less than the median here. Across Washington, the median is $41.20 at 59 hospitals.
- The median here, $35.85, is 20% below the US median of $45.00.
- That is 6.0× Medicare's 2026 national rate for the same service ($6.01).
- 1 of 18 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 18 facilities across 14 cities for code 85730, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 6, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Apr 14, 2026.
Lowest$6.02Overlake Medical Center & Clinics
Median$35.85half of hospitals charge less
Highest$112.60in this market
Difference18.7×highest vs lowest
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.
median
Lowest $6.02Highest $156.79
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Overlake Medical Center & Clinics lowest Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab4619 File of Apr 1, 2026 · source file | $6.02 | $12.04 | — | 50% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab3188 File of Apr 1, 2026 · source file | $20.24 | $40.47 | — | 50% |
| Saint Clare Hospital Lakewood, WA · (253) 588-1711 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $23.78 | $82.48 | $6.01–$61.86 | 71% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab3230_Uw File of Apr 1, 2026 · source file | $23.80 | $47.60 | — | 50% |
| St Anthony Hospital Gig Harbor, WA · (253) 530-2050 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $25.09 | $82.48 | $6.01–$61.86 | 70% |
| Highline Medical Center Burien, WA · (206) 431-5237 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $25.19 | $82.48 | $6.01–$74.24 | 69% |
| St Francis Community Hospital Federal Way, WA · (253) 944-8100 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $25.89 | $82.48 | $6.01–$61.86 | 69% |
| St Joseph Medical Center Tacoma, WA · (253) 627-4101 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $27.32 | $82.48 | $6.01–$61.86 | 67% |
| Snoqualmie Valley Hospital Snoqualmie, WA · (425) 831-2300 Facility Fee HC THROMBOPLAS TIME PARTIAL File of Apr 14, 2026 · source file | $28.00 | $48.28 | $5.89–$44.42 | 42% |
| St Elizabeth Hospital Enumclaw, WA · (360) 825-2505 HC PARTIAL THROMBN TIME ACTVTD File of Feb 28, 2026 · source file | $29.15 | $82.48 | $6.01–$74.24 | 65% |
| Snoqualmie Valley Hospital Snoqualmie, WA · (425) 831-2300 Facility Fee HC THROMBOPLAS TIME PARTIAL LAB6187+11 more lines at this price File of Apr 14, 2026 · source file | $30.78 | $53.07 | $5.89–$48.82 | 42% |
| Virginia Mason Medical Center Seattle, WA · (206) 223-6600 APTT PART THROMBOPLASTIN TIME File of Jan 1, 2026 · source file | $35.70 | $70.00 | $42.00–$56.00 | 49% |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB File of Apr 1, 2026 · source file | $36.00 | $75.00 | — | 52% |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB File of Apr 1, 2026 · source file | $36.00 | $75.00 | — | 52% |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB File of Apr 1, 2026 · source file | $36.00 | $75.00 | — | 52% |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB File of Apr 1, 2026 · source file | $36.00 | $75.00 | — | 52% |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD+2 more lines at this price File of Apr 1, 2026 · source file | $37.92 | $79.00 | — | 52% |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB+2 more lines at this price File of Apr 1, 2026 · source file | $37.92 | $79.00 | — | 52% |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB+2 more lines at this price File of Apr 1, 2026 · source file | $37.92 | $79.00 | — | 52% |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB+2 more lines at this price File of Apr 1, 2026 · source file | $37.92 | $79.00 | — | 52% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial File of Apr 1, 2026 · source file | $40.00 | $80.00 | — | 50% |
| Providence Regional Medical Center Everett Everett, WA · (425) 261-2000 HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD+2 more lines at this price File of Apr 1, 2026 · source file | $41.08 | $79.00 | — | 48% |
| Kaiser Permanente Central Hospital Seattle, WA · (206) 326-3000 PSBC ONLY APTT File of Apr 1, 2026 · source file | $41.20 | $51.50 | $4.00–$16.00 | 20% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab6180 File of Apr 1, 2026 · source file | $59.68 | $119.35 | — | 50% |
| Kaiser Permanente Central Hospital Seattle, WA · (206) 326-3000 THROMBOPLASTIN TIME PARTIAL PTT File of Apr 1, 2026 · source file | $63.20 | $79.00 | $4.00–$16.00 | 20% |
| Cascade Valley Hospital Arlington, WA · (360) 435-2133 HC THROMBOPLASTIN INHIBITION PARTIAL File of Mar 26, 2026 · source file | $64.80 | $81.00 | $6.89–$72.90 | 20% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab6191 File of Apr 1, 2026 · source file | $67.08 | $134.16 | — | 50% |
| Valley Medical Center Renton, WA · (425) 228-3450 Thromboplastin Time Partial Plasma/Whole Blood File of Mar 12, 2026 · source file | $90.30 | $129.00 | — | 30% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab6189 File of Apr 1, 2026 · source file | $101.92 | $203.85 | — | 50% |
| Seattle Children's Hospital Seattle, WA · (206) 987-2000 Act Partial Thromboplastn Time File of Mar 31, 2026 · source file | $112.60 | $112.60 | $28.38–$108.10 | — |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab6183 File of Apr 1, 2026 · source file | $116.72 | $233.45 | — | 50% |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Thromboplas Time Partial Lab6188 File of Apr 1, 2026 · source file | $156.79 | $313.58 | — | 50% |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Outpatient: lowest $6.02, median $35.85, highest $112.60 — a 18.7× difference within the same market.
As an inpatient, the same code is billed by 18 facilities here, median $32.43. 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 11 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 PTT blood test is, what the price covers and why prices differ: PTT blood test explained.