Magnesium test cost in Little Rock, AR
In Little Rock-North Little Rock-Conway, AR, 3 hospitals list a cash price for magnesium blood test: from $15.64 to $38.19, with a median of $32.40. The lowest listed price is at Arkansas Heart Hospital — $16.76 less than the median here. Across Arkansas, the median is $35.18 at 18 hospitals.
Cash prices at 3 facilities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 22, 2026; the hospital files themselves were last updated between Nov 21, 2025 and Nov 21, 2025.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Little Rock-North Little Rock-Conway, AR.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Arkansas Heart Hospital lowest Little Rock, AR · (501) 219-7000 Magnesium Level (Quest) | $15.64 | $19.55 | $30.53–$159.00 | 20% | Nov 21, 2025 source file |
| Arkansas Heart Hospital lowest Little Rock, AR · (501) 219-7000 Magnesium, Random Urine Quest | $15.64 | $19.55 | $30.53–$159.00 | 20% | Nov 21, 2025 source file |
| University of Arkansas for Medical Sciences Little Rock, AR · (501) 686-5000 MAGNESIUM LEVEL | $32.40 | $54.00 | $6.50–$887.00 | 40% | — source file |
| Arkansas Heart Hospital Little Rock, AR · (501) 219-7000 Magnesium, RBC Quest | $36.00 | $45.00 | $30.53–$159.00 | 20% | Nov 21, 2025 source file |
| Arkansas Childrens Hospital Little Rock, AR · (501) 364-1100 ASSAY OF MAGNESIUM | $38.19 | $42.43 | $6.70–$42.43 | 10% | — source file |
| University of Arkansas for Medical Sciences Little Rock, AR · (501) 686-5000 ASSAY OF MAGNESIUM | $53.26 | $88.77 | $6.50–$887.00 | 40% | — source file |
| Arkansas Heart Hospital Little Rock, AR · (501) 219-7000 Magnesium Level | $63.60 | $79.50 | $30.53–$159.00 | 20% | Nov 21, 2025 source file |
| Arkansas Childrens Hospital Little Rock, AR · (501) 364-1100 MAGNESIUM LEVEL | $107.18 | $119.09 | $6.70–$56.56 | 10% | — source file |
Outpatient: lowest $15.64, median $32.40, highest $38.19 — a 2.4× difference within the same market.
Cash or insurance?
At 3 of 3 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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.