Free T4 (thyroid) test at Marinhealth Medical Center
CPT 84439 · Greenbrae, CA
These are Marinhealth Medical Center's own posted figures from its standard-charges file dated March 26, 2026. They are not a quote. Source: the hospital's file · its price transparency page.
Across 36 California hospitals we index that post a cash price for this service: lowest $16.10, median $102.48, highest $740.75. See every hospital.
Nearby hospitals, same service
| Hospital | Distance | Cash price | Gross charge | File date |
|---|---|---|---|---|
| Kaiser Foundation Hospital - Oakland/Richmond Oakland, CA | 20.0 mi | $102.48 | $183.00 | 2026-04-01 |
| Kaiser Foundation Hospital - South San Francisco South San Francisco, CA | 21.5 mi | $102.48 | $183.00 | 2026-04-01 |
| Kaiser Foundation Hospital - Walnut Creek Walnut Creek, CA | 28.4 mi | $102.48 | $183.00 | 2026-04-01 |
| St. Rose Hospital Hayward, CA | 32.0 mi | $157.59 | $309.00 | 2026-04-01 |
| Kaiser Foundation Hospital - Redwood City Redwood City, CA | 36.9 mi | $102.48 | $183.00 | 2026-04-01 |
| Kaiser Foundation Hospital - Fremont Fremont, CA | 44.8 mi | $102.48 | $183.00 | 2026-04-01 |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA | 340.9 mi | $68.12 | $131.00 | 2026-04-01 |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA | 344.5 mi | $122.85 | $351.00 | 2026-04-01 |
Distances are straight-line from ZIP code centers. Each hospital's figures come from its own file; files are updated on different dates.
Every row for CPT 84439 in this hospital's file
| Row in the hospital's file | Setting | Cash | Gross | Insurer min – max |
|---|---|---|---|---|
| ASSAY OF FREE THYROXINE line 13725 | outpatient | $190.94 | $318.24 | $9.02 – $2,330.00 |
| ASSAY OF FREE THYROXINE line 1313 | outpatient | $5.11 | $8.52 | $8.52 – $2,330.00 |
| ASSAY OF FREE THYROXINE line 1499 | outpatient | $5.98 | $9.97 | $9.02 – $2,330.00 |
| THYROXINE (THYROID CHEMICAL); FREE line 6551 | outpatient | $183.60 | $306.00 | $9.02 – $2,330.00 |
| THYROXINE (THYROID CHEMICAL); FREE mod ET line 10945 | outpatient | $183.60 | $306.00 | $9.02 – $2,330.00 |
| THYROXINE (THYROID CHEMICAL); FREE mod GA_PO line 10946 | outpatient | $183.60 | $306.00 | $9.02 – $2,330.00 |
| THYROXINE (THYROID CHEMICAL); FREE mod GZ_PO line 10947 | outpatient | $183.60 | $306.00 | $9.02 – $2,330.00 |
The first row is the one used above. A price for one code usually covers the hospital's facility charge only; the doctor, anesthesia, pathology and other services can be billed separately. Ask the hospital for a good faith estimate before a scheduled service: if you pay yourself and the bill comes in $400 or more above the estimate, you can dispute it under the No Surprises Act.
Check a bill from this hospital All Marinhealth Medical Center prices