Magnesium test cost in Providence, RI
In Providence-Warwick, RI-MA, 8 hospitals list a cash price for Magnesium blood test: from $6.00 to $72.00, with a median of $52.70. The lowest listed price is at Landmark Medical Center — $46.70 less than the median here. Across Rhode Island, the median is $52.70 at 6 hospitals.
Cash prices at 8 facilities across 7 cities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Sep 1, 2026 and Sep 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Providence-Warwick, RI-MA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Landmark Medical Center lowest Woonsocket, RI Hc Assay Of Magnesium | $6.00 | $112.00 | $5.46–$106.40 | 95% | Sep 1, 2026 source file |
| Morton Hospital and Medical Center, Inc., Lifespan of Massachusetts - Taunton Inc Taunton, MA HC URINE MAGNESIUM | $24.97 | $24.97 | — | — | — source file |
| Morton Hospital and Medical Center, Inc., Lifespan of Massachusetts - Taunton Inc Taunton, MA HC MAGNESIUM | $24.97 | $24.97 | — | — | — source file |
| Saint Anne's Hospital, Lifespan of Massachusetts - Fall River Inc Fall River, MA HC MAGNESIUM | $32.42 | $32.42 | — | — | — source file |
| Saint Anne's Hospital, Lifespan of Massachusetts - Fall River Inc Fall River, MA HC URINE MAGNESIUM | $32.42 | $32.42 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI HC STONERISK MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI HC MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| The Miriam Hospital Providence, RI HC URINE MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| The Miriam Hospital Providence, RI HC RBC MAGNESIUM SO | $52.70 | $52.70 | — | — | — source file |
| The Miriam Hospital Providence, RI HC STONERISK MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| The Miriam Hospital Providence, RI HC ASSAY OF MAGNESIUM SEND OUTS | $52.70 | $52.70 | — | — | — source file |
| The Miriam Hospital Providence, RI HC MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Newport Hospital Newport, RI HC URINE MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Newport Hospital Newport, RI HC RBC MAGNESIUM SO | $52.70 | $52.70 | — | — | — source file |
| Newport Hospital Newport, RI HC STONERISK MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Newport Hospital Newport, RI HC ASSAY OF MAGNESIUM SEND OUTS | $52.70 | $52.70 | — | — | — source file |
| Newport Hospital Newport, RI HC MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Rhode Island Hospital Providence, RI HC URINE MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Rhode Island Hospital Providence, RI HC RBC MAGNESIUM SO | $52.70 | $52.70 | — | — | — source file |
| Rhode Island Hospital Providence, RI HC STONERISK MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Rhode Island Hospital Providence, RI HC ASSAY OF MAGNESIUM SEND OUTS | $52.70 | $52.70 | — | — | — source file |
| Rhode Island Hospital Providence, RI HC MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI HC RBC MAGNESIUM SO | $52.70 | $52.70 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI HC URINE MAGNESIUM | $52.70 | $52.70 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI HC ASSAY OF MAGNESIUM SEND OUTS | $52.70 | $52.70 | — | — | — source file |
| South County Health Wakefield, RI Magnesium | $72.00 | $120.00 | $10.37 | 40% | — source file |
Outpatient: lowest $6.00, median $52.70, highest $72.00 — a 12.0× difference within the same market.
As an inpatient, the same code is billed by 6 facilities here, median $52.70. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 1 of 2 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it below every plan's rate. 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.