Magnesium test at Saint John's Health Center
CPT 83735 · Santa Monica, CA
These are Saint John's Health Center's own posted figures from its standard-charges file dated April 1, 2026. They are not a quote. Source: the hospital's file · its price transparency page.
Across 37 California hospitals we index that post a cash price for this service: lowest $16.55, median $117.60, highest $477.25. See every hospital.
Nearby hospitals, same service
| Hospital | Distance | Cash price | Gross charge | File date |
|---|---|---|---|---|
| Southern California Hospital at Hollywood Hollywood, CA | 9.8 mi | $284.34 | $284.34 | 2026-03-18 |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA | 9.8 mi | $103.25 | $295.00 | 2026-04-01 |
| Valley Presbyterian Hospital Van Nuys, CA | 12.2 mi | $164.00 | $164.00 | 2026-07-09 |
| Kaiser Foundation Hospital - Los Angeles Los Angeles, CA | 12.3 mi | $106.08 | $204.00 | 2026-04-01 |
| Providence Saint Joseph Medical Center Burbank, CA | 12.6 mi | $112.00 | $140.00 | 2026-04-01 |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA | 13.2 mi | $106.08 | $204.00 | 2026-04-01 |
| Mission Community Hospital Panorama City, CA | 13.6 mi | $183.29 | $183.29 | 2026-09-01 |
| Memorial Hospital of Gardena Gardena, CA | 13.8 mi | $274.05 | $274.05 | 2026-02-04 |
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 83735 in this hospital's file
| Row in the hospital's file | Setting | Cash | Gross | Insurer min – max |
|---|---|---|---|---|
| HC ASSAY OF MAGNESIUM CDM standard_charge_information[1874] | both | $123.55 | $353.00 | |
| HC MAGNESIUM QUANT URINE standard_charge_information[1659] | both | $113.05 | $323.00 | |
| HC MAGNESIUM QUANT URINE standard_charge_information[1659] | outpatient | $28.35 | $81.00 | |
| HC ASSAY OF MAGNESIUM CDM standard_charge_information[1874] | outpatient | $31.50 | $90.00 | |
| HC ASSAY OF MAGNESIUM CDM standard_charge_information[1912] | both | $113.05 | $323.00 | |
| HC ASSAY OF MAGNESIUM CDM standard_charge_information[1912] | outpatient | $28.35 | $81.00 | |
| Assay of magnesium standard_charge_information[348086] | outpatient | $6.70 – $63.84 |
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 Saint John's Health Center prices