Magnesium test at Mercy Hospital St. Louis
CPT 83735 · Saint Louis, MO
These are Mercy Hospital St. Louis's own posted figures from its standard-charges file dated June 4, 2026. 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 West County Hospital Creve Coeur, MO | 0.0 mi | $93.60 | $156.00 | 2025-12-15 |
| Missouri Baptist Medical Center Saint Louis, MO | 3.0 mi | $93.60 | $156.00 | 2025-12-15 |
| Ranken Jordan Pediatric Bridge Hospital Maryland Heights, MO | 4.9 mi | $20.15 | $25.18 | 2026-04-24 |
| Barnes Jewish Hospital Saint Louis, MO | 10.4 mi | $91.80 | $153.00 | 2025-12-15 |
| St. Louis Childrens Hospital Saint Louis, MO | 10.4 mi | $31.20 | $52.00 | 2025-12-15 |
| Mercy Hospital South Saint Louis, MO | 12.1 mi | $83.20 | $128.00 | 2026-06-10 |
| Christian Hospital Northeast Saint Louis, MO | 12.1 mi | $93.60 | $156.00 | 2025-12-15 |
| Barnes-Jewish St. Peters Hospital Saint Peters, MO | 13.0 mi | $93.60 | $156.00 | 2025-12-15 |
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 |
|---|---|---|---|---|
| Magnesium 24 Hr Urine line 2451179 | outpatient | $76.05 | $117.00 | $6.03 – $15.08 |
| Magnesium Urine line 2441008 | outpatient | $60.45 | $93.00 | $6.05 – $93.00 |
| Magnesium RBC line 2452446 | outpatient | $76.05 | $117.00 | $6.03 – $15.08 |
| Magnesium RBC line 2466904 | outpatient | $76.05 | $117.00 | $7.61 – $117.00 |
| Magnesium line 2470890 | outpatient | $24.05 | $37.00 | $2.41 – $37.00 |
| Magnesium Stool line 2471111 | outpatient | $76.05 | $117.00 | $6.03 – $15.08 |
| Magnesium line 2474964 | outpatient | $24.05 | $37.00 | $6.03 – $15.08 |
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 Mercy Hospital St. Louis prices