Magnesium test at St. Louis Childrens Hospital
CPT 83735 · Saint Louis, MO
These are St. Louis Childrens Hospital's own posted figures from its standard-charges file dated December 15, 2025. They are not a quote. Source: the hospital's file · its price transparency page.
Across 14 Missouri hospitals we index that post a cash price for this service: lowest $20.15, median $84.18, highest $93.60. See every hospital.
Nearby hospitals, same service
| Hospital | Distance | Cash price | Gross charge | File date |
|---|---|---|---|---|
| Barnes Jewish Hospital Saint Louis, MO | 0.0 mi | $91.80 | $153.00 | 2025-12-15 |
| Christian Hospital Northeast Saint Louis, MO | 8.3 mi | $93.60 | $156.00 | 2025-12-15 |
| Missouri Baptist Medical Center Saint Louis, MO | 9.4 mi | $93.60 | $156.00 | 2025-12-15 |
| Mercy Hospital St. Louis Saint Louis, MO | 10.4 mi | $76.05 | $117.00 | 2026-06-04 |
| Barnes-Jewish West County Hospital Creve Coeur, MO | 10.4 mi | $93.60 | $156.00 | 2025-12-15 |
| Gateway Regional Medical Center Granite City, IL | 11.0 mi | $206.46 | $344.10 | 2026-03-30 |
| Mercy Hospital South Saint Louis, MO | 11.3 mi | $83.20 | $128.00 | 2026-06-10 |
| Ranken Jordan Pediatric Bridge Hospital Maryland Heights, MO | 12.4 mi | $20.15 | $25.18 | 2026-04-24 |
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 Magnesium Urine standard_charge_information[18862] | both | $31.20 | $52.00 | $6.70 – $156.00 |
| HC Magnesium standard_charge_information[18863] | both | $31.20 | $52.00 | $6.70 – $156.00 |
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 St. Louis Childrens Hospital prices