Magnesium test cost in Phoenix, AZ — inpatient
In Phoenix-Mesa-Chandler, AZ, 27 hospitals list a cash price for magnesium blood test as an inpatient: from $4.37 to $295.00, with a median of $23.22. The lowest listed price is at Banner Heart Hospital — $18.85 less than the median here. Across Arizona, the median is $10.04 at 36 hospitals.
Cash prices at 27 facilities across 14 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 2, 2026 and May 1, 2026.
Lowest$4.37Banner Heart Hospital
Median$23.22half pay less
Highest$295.00in this market
Difference67.5×highest vs lowest
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.
median
Lowest $4.37Highest $295.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Banner Heart Hospital lowest Mesa, AZ · (480) 854-5050 LAB MAGNESIUM URINE | $4.37 | $52.00 | $23.40–$39.00 | 92% | Mar 2, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ · (520) 381-6300 LAB MAGNESIUM URINE | $5.88 | $52.00 | $23.40–$39.00 | 89% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ · (480) 321-2000 LAB MAGNESIUM URINE | $6.60 | $52.00 | $23.40–$39.00 | 87% | Mar 2, 2026 source file |
| Banner Heart Hospital Mesa, AZ · (480) 854-5050 LAB MAGNESIUM NS | $7.39 | $88.00 | $39.60–$66.00 | 92% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ · (480) 412-3000 LAB MAGNESIUM URINE | $7.80 | $52.00 | $23.40–$39.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ · (623) 832-4000 LAB MAGNESIUM URINE | $7.85 | $52.00 | $23.40–$41.60 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ · (623) 524-4000 LAB MAGNESIUM URINE | $8.01 | $52.00 | $23.40–$41.60 | 85% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ · (602) 865-4470 LAB MAGNESIUM URINE | $8.22 | $52.00 | $23.40–$39.00 | 84% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ · (623) 327-4000 LAB MAGNESIUM URINE | $8.22 | $52.00 | $23.40–$39.00 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ · (602) 839-2000 LAB MAGNESIUM URINE | $8.32 | $52.00 | $23.40–$39.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ · (480) 543-2000 LAB MAGNESIUM URINE | $8.63 | $52.00 | $23.40–$39.00 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ · (480) 394-4000 LAB MAGNESIUM URINE | $9.00 | $52.00 | $23.40–$39.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ · (480) 733-3300 LAB MAGNESIUM URINE | $9.88 | $52.00 | $23.40–$39.00 | 81% | Mar 2, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ · (520) 381-6300 LAB MAGNESIUM NS | $9.94 | $88.00 | $39.60–$66.00 | 89% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ · (480) 256-7000 LAB MAGNESIUM URINE | $10.19 | $52.00 | $23.40–$39.00 | 80% | Mar 2, 2026 source file |
| Banner Heart Hospital Mesa, AZ · (480) 854-5050 LAB MAGNESIUM | $11.09 | $132.00 | $59.40–$99.00 | 92% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ · (480) 321-2000 LAB MAGNESIUM NS | $11.18 | $88.00 | $39.60–$66.00 | 87% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ · (480) 412-3000 LAB MAGNESIUM NS | $13.20 | $88.00 | $39.60–$66.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ · (623) 832-4000 LAB MAGNESIUM NS | $13.29 | $88.00 | $39.60–$70.40 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ · (623) 524-4000 LAB MAGNESIUM NS | $13.55 | $88.00 | $39.60–$70.40 | 85% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ · (602) 865-4470 LAB MAGNESIUM NS | $13.90 | $88.00 | $39.60–$66.00 | 84% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ · (623) 327-4000 LAB MAGNESIUM NS | $13.90 | $88.00 | $39.60–$66.00 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ · (602) 839-2000 LAB MAGNESIUM NS | $14.08 | $88.00 | $39.60–$66.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ · (480) 543-2000 LAB MAGNESIUM NS | $14.61 | $88.00 | $39.60–$66.00 | 83% | May 1, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ · (520) 381-6300 LAB MAGNESIUM | $14.92 | $132.00 | $59.40–$99.00 | 89% | Mar 2, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ · (480) 394-4000 LAB MAGNESIUM NS | $15.22 | $88.00 | $39.60–$66.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ · (480) 733-3300 LAB MAGNESIUM NS | $16.72 | $88.00 | $39.60–$66.00 | 81% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ · (480) 321-2000 LAB MAGNESIUM | $16.76 | $132.00 | $59.40–$99.00 | 87% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ · (480) 256-7000 LAB MAGNESIUM NS | $17.25 | $88.00 | $39.60–$66.00 | 80% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ · (480) 412-3000 LAB MAGNESIUM | $19.80 | $132.00 | $59.40–$99.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ · (623) 832-4000 LAB MAGNESIUM | $19.93 | $132.00 | $59.40–$105.60 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ · (623) 524-4000 LAB MAGNESIUM | $20.33 | $132.00 | $59.40–$105.60 | 85% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ · (623) 327-4000 LAB MAGNESIUM | $20.86 | $132.00 | $59.40–$99.00 | 84% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ · (602) 865-4470 LAB MAGNESIUM | $20.86 | $132.00 | $59.40–$99.00 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ · (602) 839-2000 LAB MAGNESIUM | $21.12 | $132.00 | $59.40–$99.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ · (480) 543-2000 LAB MAGNESIUM | $21.91 | $132.00 | $59.40–$99.00 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ · (480) 394-4000 LAB MAGNESIUM | $22.84 | $132.00 | $59.40–$99.00 | 83% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ MAGNESIUM | $23.22 | $23.22 | $23.22 | — | Mar 31, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ MAGNESIUM | $23.22 | $23.22 | $23.22 | — | Mar 16, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ · (480) 733-3300 LAB MAGNESIUM | $25.08 | $132.00 | $59.40–$99.00 | 81% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ · (480) 256-7000 LAB MAGNESIUM | $25.87 | $132.00 | $59.40–$99.00 | 80% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ S/O MAGNESIUM RBC | $30.45 | $30.45 | $30.45 | — | Mar 31, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ S/O MAGNESIUM RBC | $30.45 | $30.45 | $30.45 | — | Mar 16, 2026 source file |
| Banner Behavioral Health Hospital Scottsdale, AZ · (480) 448-7500 LAB MAGNESIUM URINE | $30.47 | $52.00 | $23.40–$40.04 | 41% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ S/O URINE SUPERSAT | $32.55 | $32.55 | $32.55 | — | Mar 16, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ S/O URINE SUPERSAT | $32.55 | $32.55 | $32.55 | — | Mar 31, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ S/O MAGNESIUM URINE | $65.10 | $65.10 | $65.10 | — | Mar 31, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ S/O MAGNESIUM URINE | $65.10 | $65.10 | $65.10 | — | Mar 16, 2026 source file |
| Banner Behavioral Health Hospital Scottsdale, AZ · (480) 448-7500 LAB MAGNESIUM | $77.34 | $132.00 | $59.40–$101.64 | 41% | Mar 2, 2026 source file |
| Reunion Rehabilitation Hospital Phoenix Phoenix, AZ Assay of Magnesium, RBC | $184.83 | $184.83 | — | — | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Phoenix Phoenix, AZ Assay of magnesium | $184.83 | $184.83 | — | — | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Peoria Peoria, AZ Assay of magnesium | $184.83 | $184.83 | — | — | 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 Shea Medical Center Scottsdale, AZ · (480) 323-3000 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Scottsdale Thompson Peak Med Center Scottsdale, AZ · (480) 324-7001 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth John C. Lincoln Medical Center Phoenix, AZ · (602) 943-2381 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Sonoran Crossing Medical Center Phoenix, AZ · (480) 882-4327 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Four Peaks Medical Center Mesa, AZ · (480) 358-6100 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 Deer Valley Medical Center Phoenix, AZ · (623) 879-6100 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Scottsdale Osborn Medical Center Scottsdale, AZ · (480) 882-4004 Hc Assay Blood Magnesium | $295.00 | $295.00 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $4.37, median $23.22, highest $295.00 — a 67.5× difference within the same market.
As an outpatient, the same code is billed by 26 facilities here, median $10.04 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 14 of 16 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 13 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 |