Sodium test cost in Seattle, WA
In Seattle-Tacoma-Bellevue, WA, 18 hospitals list a cash price for sodium blood test: from $10.50 to $57.60, with a median of $34.53. The lowest listed price is at Overlake Medical Center & Clinics — $24.03 less than the median here. Across Washington, the median is $41.70 at 59 hospitals.
Cash prices at 18 facilities across 14 cities for code 84295, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Apr 1, 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 | File date |
|---|---|---|---|---|---|
| Overlake Medical Center & Clinics lowest Bellevue, WA · (425) 688-5000 Hc Istat Sodium | $10.50 | $21.00 | — | 50% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Sodium Resp Care | $19.50 | $39.00 | — | 50% | Apr 1, 2026 source file |
| Overlake Medical Center & Clinics Bellevue, WA · (425) 688-5000 Hc Assay Of Serum Sodium | $20.50 | $41.00 | — | 50% | Apr 1, 2026 source file |
| Virginia Mason Medical Center Seattle, WA · (206) 223-6600 SODIUM | $23.97 | $47.00 | $28.20–$37.60 | 49% | — source file |
| Snoqualmie Valley Hospital Snoqualmie, WA · (425) 831-2300 Facility Fee HC SODIUM, SERUM-LC | $24.63 | $42.47 | $4.71–$39.07 | 42% | — source file |
| Snoqualmie Valley Hospital Snoqualmie, WA · (425) 831-2300 Facility Fee HC ASSAY OF SERUM SODIUM | $24.63 | $42.47 | $4.71–$39.07 | 42% | — source file |
| Saint Clare Hospital Lakewood, WA · (253) 588-1711 HC POC SODIUM | $28.13 | $97.58 | $4.81–$73.19 | 71% | Feb 28, 2026 source file |
| St Anthony Hospital Gig Harbor, WA · (253) 530-2050 HC POC SODIUM | $29.68 | $97.58 | $4.81–$73.19 | 70% | Feb 28, 2026 source file |
| Highline Medical Center Burien, WA · (206) 431-5237 HC POC SODIUM | $29.80 | $97.58 | $4.81–$87.83 | 69% | Feb 28, 2026 source file |
| St Francis Community Hospital Federal Way, WA · (253) 944-8100 HC POC SODIUM | $30.63 | $97.58 | $4.81–$73.19 | 69% | Feb 28, 2026 source file |
| St Joseph Medical Center Tacoma, WA · (253) 627-4101 HC POC SODIUM | $32.32 | $97.58 | $4.81–$73.19 | 67% | Feb 28, 2026 source file |
| Saint Clare Hospital Lakewood, WA · (253) 588-1711 HC SODIUM (WHOLE BLOOD) POC | $33.19 | $115.14 | $4.81–$86.36 | 71% | Feb 28, 2026 source file |
| St Elizabeth Hospital Enumclaw, WA · (360) 825-2505 HC POC SODIUM | $34.49 | $97.58 | $4.81–$87.83 | 65% | Feb 28, 2026 source file |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD LAB | $34.56 | $72.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD LAB | $34.56 | $72.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD LAB | $34.56 | $72.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD LAB | $34.56 | $72.00 | — | 52% | Apr 1, 2026 source file |
| St Anthony Hospital Gig Harbor, WA · (253) 530-2050 HC SODIUM (WHOLE BLOOD) POC | $35.02 | $115.14 | $4.81–$86.36 | 70% | Feb 28, 2026 source file |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC SODIUM | $35.04 | $73.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC SODIUM | $35.04 | $73.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC SODIUM | $35.04 | $73.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC SODIUM | $35.04 | $73.00 | — | 52% | Apr 1, 2026 source file |
| Highline Medical Center Burien, WA · (206) 431-5237 HC SODIUM (WHOLE BLOOD) POC | $35.16 | $115.14 | $4.81–$103.63 | 69% | Feb 28, 2026 source file |
| Swedish Medical Center Seattle, WA · (206) 386-6000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD | $35.52 | $74.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Medical Center / Cherry Hill Seattle, WA · (206) 320-2000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD | $35.52 | $74.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Issaquah Issaquah, WA · (425) 313-4000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD | $35.52 | $74.00 | — | 52% | Apr 1, 2026 source file |
| Swedish Edmonds Edmonds, WA · (425) 640-4000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD | $35.52 | $74.00 | — | 52% | Apr 1, 2026 source file |
| St Francis Community Hospital Federal Way, WA · (253) 944-8100 HC SODIUM (WHOLE BLOOD) POC | $36.14 | $115.14 | $4.81–$86.36 | 69% | Feb 28, 2026 source file |
| Cascade Valley Hospital Arlington, WA · (360) 435-2133 HC SODIUM | $37.60 | $47.00 | $4.00–$42.30 | 20% | — source file |
| Providence Regional Medical Center Everett Everett, WA · (425) 261-2000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD | $37.96 | $73.00 | — | 48% | Apr 1, 2026 source file |
| Providence Regional Medical Center Everett Everett, WA · (425) 261-2000 HC SODIUM SERUM PLASMA OR WHOLE BLOOD CDM | $37.96 | $73.00 | — | 48% | Apr 1, 2026 source file |
| Providence Regional Medical Center Everett Everett, WA · (425) 261-2000 HC SODIUM | $37.96 | $73.00 | — | 48% | Apr 1, 2026 source file |
| St Joseph Medical Center Tacoma, WA · (253) 627-4101 HC SODIUM (WHOLE BLOOD) POC | $38.14 | $115.14 | $4.81–$86.36 | 67% | Feb 28, 2026 source file |
| St Elizabeth Hospital Enumclaw, WA · (360) 825-2505 HC SODIUM (WHOLE BLOOD) POC | $40.69 | $115.14 | $4.81–$103.63 | 65% | Feb 28, 2026 source file |
| Seattle Children's Hospital Seattle, WA · (206) 987-2000 Esrd Assay of Serum Sodium | $49.40 | $49.40 | $12.45–$47.42 | — | — source file |
| Valley Medical Center Renton, WA · (425) 228-3450 Sodium Serum Plasma or Whole Blood | $49.70 | $71.00 | — | 30% | — source file |
| Kaiser Permanente Central Hospital Seattle, WA · (206) 326-3000 SODIUM SERUM | $57.60 | $72.00 | $4.00–$15.00 | 20% | Apr 1, 2026 source file |
| Seattle Children's Hospital Seattle, WA · (206) 987-2000 Sodium Serum | $63.70 | $63.70 | $16.05–$61.15 | — | — source file |
Outpatient: lowest $10.50, median $34.53, highest $57.60 — a 5.5× difference within the same market.
As an inpatient, the same code is billed by 19 facilities here, median $34.49. 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 it is
A sodium test measures the level of sodium in the blood. It is used for confusion, weakness, dehydration and for people on diuretics or with heart, kidney or liver disease.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.