Partial thromboplastin time (PTT) clotting test in Seattle-Tacoma-Bellevue, WA
In Seattle-Tacoma-Bellevue, WA, 15 hospitals list a cash price for Partial thromboplastin time (PTT) clotting test: from $6.02 to $156.79, with a median of $37.92. The lowest listed price is at Overlake Medical Center & Clinics.
Cash prices at 15 facilities across 13 cities for code 85730, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Apr 1, 2026.
Lowest$6.02Overlake Medical Center & Clinics
Median$37.92half pay less
Highest$156.79in this market
Difference26.0×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 | Off list | File date |
|---|---|---|---|---|
| Overlake Medical Center & Clinics lowest Bellevue, WA Hc Thromboplas Time Partial Lab4619 | $6.02 | $12.04 | 50% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab3188 | $20.24 | $40.47 | 50% | Apr 1, 2026 source file |
| Saint Clare Hospital Lakewood, WA HC PARTIAL THROMBN TIME ACTVTD | $23.78 | $82.48 | 71% | Feb 28, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab3230_Uw | $23.80 | $47.60 | 50% | Apr 1, 2026 source file |
| Franciscan Health System Gig Harbor, WA HC PARTIAL THROMBN TIME ACTVTD | $25.09 | $82.48 | 70% | Feb 28, 2026 source file |
| Highline Medical Center Burien, WA HC PARTIAL THROMBN TIME ACTVTD | $25.19 | $82.48 | 69% | Feb 28, 2026 source file |
| St Francis Community Hospital Federal Way, WA HC PARTIAL THROMBN TIME ACTVTD | $25.89 | $82.48 | 69% | Feb 28, 2026 source file |
| Franciscan Health System Tacoma, WA HC PARTIAL THROMBN TIME ACTVTD | $27.32 | $82.48 | 67% | Feb 28, 2026 source file |
| Enumclaw Regional Hospital Association Enumclaw, WA HC PARTIAL THROMBN TIME ACTVTD | $29.15 | $82.48 | 65% | Feb 28, 2026 source file |
| Virginia Mason Medical Center Seattle, WA APTT PART THROMBOPLASTIN TIME | $35.70 | $70.00 | 49% | — source file |
| Swedish Health Services Issaquah, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB | $36.00 | $75.00 | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB | $36.00 | $75.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB | $36.00 | $75.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA LAB | $36.00 | $75.00 | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Issaquah, WA HC THROMBOPLASTIN TIME PARTIAL | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Issaquah, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Issaquah, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Health Services Seattle, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA HC THROMBOPLASTIN TIME PARTIAL | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB | $37.92 | $79.00 | 52% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial | $40.00 | $80.00 | 50% | Apr 1, 2026 source file |
| Providence Health And Services - Washington Everett, WA HC THROMBOPLASTIN TIME PARTIAL | $41.08 | $79.00 | 48% | Apr 1, 2026 source file |
| Providence Health And Services - Washington Everett, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $41.08 | $79.00 | 48% | Apr 1, 2026 source file |
| Providence Health And Services - Washington Everett, WA HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB | $41.08 | $79.00 | 48% | Apr 1, 2026 source file |
| Kaiser Permanente Central Hospital E Seattle, WA PSBC ONLY APTT | $41.20 | $51.50 | 20% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab6180 | $59.68 | $119.35 | 50% | Apr 1, 2026 source file |
| Kaiser Permanente Central Hospital E Seattle, WA THROMBOPLASTIN TIME PARTIAL PTT | $63.20 | $79.00 | 20% | Apr 1, 2026 source file |
| Public Hospital Dist No 1 Skagit dba Cascade Valley Hospital Arlington, WA HC THROMBOPLASTIN INHIBITION PARTIAL | $64.80 | $81.00 | 20% | — source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab6191 | $67.08 | $134.16 | 50% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab6189 | $101.92 | $203.85 | 50% | Apr 1, 2026 source file |
| Seattle Children's Hospital Seattle, WA Act Partial Thromboplastn Time | $112.60 | $112.60 | — | — source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab6183 | $116.72 | $233.45 | 50% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA Hc Thromboplas Time Partial Lab6188 | $156.79 | $313.58 | 50% | Apr 1, 2026 source file |
Outpatient: lowest $6.02, median $37.92, highest $156.79 — a 26.0× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $37.92. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
What it is
The partial thromboplastin time (PTT or aPTT) test measures how long it takes blood to clot through a different pathway than the PT test. It is used to check for bleeding disorders, before surgery, and to monitor heparin.
What the price covers
The price usually covers the PTT test. The blood draw is often billed separately.