Magnesium test cost in Mayagüez, PR — inpatient
In Mayagüez, PR, 1 hospital lists a cash price for magnesium blood test as an inpatient: from $10.00 to $10.00, with a median of $10.00.
Cash prices at 1 facility for code 83735, as an inpatient (admitted to hospital) . Collected Sep 22, 2026; the hospital files themselves were last updated between — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Mayagüez, PR.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Bella Vista Hospital lowest Mayaguez, PR · (787) 652-6045 MAGNESIUM SERUM OR URINE | $10.00 | $10.00 | $6.38–$25.00 | — | — source file |
| Bella Vista Hospital Mayaguez, PR · (787) 652-6045 MAGNESIUM,SERUM | $15.00 | $15.00 | $6.38–$25.00 | — | — source file |
| Bella Vista Hospital Mayaguez, PR · (787) 652-6045 MAGNESIO (W MODIFIC) | $20.00 | $20.00 | $6.70–$15.00 | — | — source file |
| Bella Vista Hospital Mayaguez, PR · (787) 652-6045 MAGNESIUM/24 HR URINE | $24.00 | $24.00 | $6.38–$25.00 | — | — source file |
| Bella Vista Hospital Mayaguez, PR · (787) 652-6045 MAGNESIO IN STOOL | $93.00 | $93.00 | $6.38–$25.00 | — | — source file |
Inpatient: lowest $10.00, median $10.00, highest $10.00.
As an outpatient, the same code is billed by 1 facility here, median $10.00 — that is the price to compare if you are not being admitted.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. 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 magnesium test measures the level of magnesium in the blood. Doctors order it for muscle cramps or weakness, an irregular heartbeat, low potassium or calcium that does not correct, and for people on diuretics, long-term acid-reducing drugs or with kidney disease.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.