Magnesium test cost in Phoenix, AZ
In Phoenix-Mesa-Chandler, AZ, 26 hospitals list a cash price for Magnesium blood test: from $4.37 to $295.00, with a median of $10.04. The lowest listed price is at Banner Heart Hospital — $5.67 less than the median here. Across Arizona, the median is $10.04 at 36 hospitals.
Cash prices at 26 facilities across 14 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 Mar 2, 2026 and Jun 28, 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 Phoenix-Mesa-Chandler, AZ.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Banner Heart Hospital lowest Mesa, AZ LAB MAGNESIUM URINE | $4.37 | $52.00 | $6.70–$39.00 | 92% | Mar 2, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ LAB MAGNESIUM URINE | $5.88 | $52.00 | $6.70–$39.00 | 89% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ LAB MAGNESIUM URINE | $6.60 | $52.00 | $6.70–$39.00 | 87% | Mar 2, 2026 source file |
| Banner Heart Hospital Mesa, AZ LAB MAGNESIUM NS | $7.39 | $88.00 | $6.70–$66.00 | 92% | Mar 2, 2026 source file |
| Maricopa County Special Health Care District Phoenix, AZ HC MAGNESIUM | $7.71 | $150.00 | $6.70–$13.40 | 95% | Jun 28, 2026 source file |
| Banner Desert Medical Center Mesa, AZ LAB MAGNESIUM URINE | $7.80 | $52.00 | $6.70–$39.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ LAB MAGNESIUM URINE | $7.85 | $52.00 | $6.70–$41.60 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ LAB MAGNESIUM URINE | $8.01 | $52.00 | $6.70–$41.60 | 85% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ LAB MAGNESIUM URINE | $8.22 | $52.00 | $6.70–$39.00 | 84% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ LAB MAGNESIUM URINE | $8.22 | $52.00 | $6.70–$72.99 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ LAB MAGNESIUM URINE | $8.32 | $52.00 | $6.70–$39.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ LAB MAGNESIUM URINE | $8.63 | $52.00 | $6.70–$39.00 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ LAB MAGNESIUM URINE | $9.00 | $52.00 | $6.70–$39.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ LAB MAGNESIUM URINE | $9.88 | $52.00 | $6.70–$39.00 | 81% | Mar 2, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ LAB MAGNESIUM NS | $9.94 | $88.00 | $6.70–$66.00 | 89% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ LAB MAGNESIUM URINE | $10.19 | $52.00 | $6.70–$39.00 | 80% | Mar 2, 2026 source file |
| Banner Heart Hospital Mesa, AZ LAB MAGNESIUM | $11.09 | $132.00 | $6.70–$99.00 | 92% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ LAB MAGNESIUM NS | $11.18 | $88.00 | $6.70–$66.00 | 87% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ LAB MAGNESIUM NS | $13.20 | $88.00 | $6.70–$66.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ LAB MAGNESIUM NS | $13.29 | $88.00 | $6.70–$70.40 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ LAB MAGNESIUM NS | $13.55 | $88.00 | $6.70–$70.40 | 85% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ LAB MAGNESIUM NS | $13.90 | $88.00 | $6.70–$66.00 | 84% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ LAB MAGNESIUM NS | $13.90 | $88.00 | $6.70–$72.99 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ LAB MAGNESIUM NS | $14.08 | $88.00 | $6.70–$66.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ LAB MAGNESIUM NS | $14.61 | $88.00 | $6.70–$66.00 | 83% | May 1, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ LAB MAGNESIUM | $14.92 | $132.00 | $6.70–$99.00 | 89% | Mar 2, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ LAB MAGNESIUM NS | $15.22 | $88.00 | $6.70–$66.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ LAB MAGNESIUM NS | $16.72 | $88.00 | $6.70–$66.00 | 81% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ LAB MAGNESIUM | $16.76 | $132.00 | $6.70–$99.00 | 87% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ LAB MAGNESIUM NS | $17.25 | $88.00 | $6.70–$66.00 | 80% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ LAB MAGNESIUM | $19.80 | $132.00 | $6.70–$99.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ LAB MAGNESIUM | $19.93 | $132.00 | $6.70–$105.60 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ LAB MAGNESIUM | $20.33 | $132.00 | $6.70–$105.60 | 85% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ LAB MAGNESIUM | $20.86 | $132.00 | $6.70–$99.00 | 84% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ LAB MAGNESIUM | $20.86 | $132.00 | $6.70–$99.00 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ LAB MAGNESIUM | $21.12 | $132.00 | $6.70–$99.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ LAB MAGNESIUM | $21.91 | $132.00 | $6.70–$99.00 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ LAB MAGNESIUM | $22.84 | $132.00 | $6.70–$99.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ LAB MAGNESIUM | $25.08 | $132.00 | $6.70–$99.00 | 81% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ LAB MAGNESIUM | $25.87 | $132.00 | $6.70–$99.00 | 80% | Mar 2, 2026 source file |
| Banner Behavioral Health Hospital Scottsdale, AZ LAB MAGNESIUM URINE | $30.47 | $52.00 | $6.70–$36.40 | 41% | Mar 2, 2026 source file |
| Banner Behavioral Health Hospital Scottsdale, AZ LAB MAGNESIUM | $77.34 | $132.00 | $6.70–$92.40 | 41% | Mar 2, 2026 source file |
| Reunion Rehabilitation Hospital Phoenix, LLC Phoenix, AZ Assay of magnesium | $184.83 | $184.83 | — | — | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Phoenix, LLC Phoenix, AZ Assay of Magnesium, RBC | $184.83 | $184.83 | — | — | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Peoria, LLC Peoria, AZ Assay of magnesium | $184.83 | $184.83 | — | — | Apr 1, 2026 source file |
| Honorhealth Scottsdale Shea Medical Center Scottsdale, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Four Peaks Medical Center Mesa, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Florence Medical Center Florence, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Sonoran Crossing Medical Center Phoenix, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Deer Valley Medical Center Phoenix, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Tempe Medical Center Tempe, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Scottsdale Thompson Peak Med Center Scottsdale, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth John C. Lincoln Medical Center Phoenix, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| Honorhealth Scottsdale Osborn Medical Center Scottsdale, AZ Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $4.37, median $10.04, highest $295.00 — a 67.5× difference within the same market.
As an inpatient, the same code is billed by 27 facilities here, median $23.22. 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 15 of 15 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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.
14 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 83735 ($43.50). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Banner Heart Hospital Mesa, AZLAB MAGNESIUM STOOL | $1.76 | file |
| Banner Casa Grande Medical Center Casa Grande, AZLAB MAGNESIUM STOOL | $2.37 | file |
| Banner Casa Grande Medical Center Casa Grande, AZLAB MAGNESIUM URINE NS | $2.37 | file |
| Banner Baywood Medical Center Mesa, AZLAB MAGNESIUM STOOL | $2.67 | file |
| Banner Desert Medical Center Mesa, AZLAB MAGNESIUM STOOL | $3.15 | file |
| Banner Boswell Medical Center Sun City, AZLAB MAGNESIUM URINE NS | $3.17 | file |
| Banner Del E Webb Medical Center Sun City West, AZLAB MAGNESIUM URINE NS | $3.23 | file |
| Banner Thunderbird Medical Center Glendale, AZLAB MAGNESIUM STOOL | $3.32 | file |
| Banner Estrella Medical Center Phoenix, AZLAB MAGNESIUM STOOL | $3.32 | file |
| Banner University Medical Center Phoenix Phoenix, AZLAB MAGNESIUM STOOL | $3.36 | file |
| Banner Gateway Medical Center Gilbert, AZLAB MAGNESIUM STOOL | $3.49 | file |
| Banner Ironwood Medical Center San Tan Valley, AZLAB MAGNESIUM STOOL | $3.63 | file |
| Banner Goldfield Medical Center Apache Junction, AZLAB MAGNESIUM STOOL | $3.99 | file |
| Banner Ocotillo Medical Center Chandler, AZLAB MAGNESIUM STOOL | $4.12 | file |