Magnesium test cost in San Luis Obispo, CA — inpatient
In San Luis Obispo-Paso Robles, CA, 1 hospital lists a cash price for magnesium blood test as an inpatient: from $5.23 to $5.23, with a median of $5.23. Across California, the median is $50.40 at 167 hospitals.
Cash prices at 1 facility for code 83735, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Feb 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 San Luis Obispo-Paso Robles, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Dignity Community Care lowest San Luis Obispo, CA · (805) 543-5353 RL-A-FEC PRO 20699C | $5.23 | $13.32 | $3.60–$13.06 | 61% | Feb 28, 2026 source file |
| Dignity Community Care San Luis Obispo, CA · (805) 543-5353 RL-A-MG RBC 92079 | $9.41 | $24.00 | $6.48–$23.52 | 61% | Feb 28, 2026 source file |
| Dignity Community Care San Luis Obispo, CA · (805) 543-5353 RL-A-NMS CATH ST 1033ST A | $48.61 | $124.00 | $33.48–$121.52 | 61% | Feb 28, 2026 source file |
| Dignity Community Care San Luis Obispo, CA · (805) 543-5353 MAGNESIUM | $138.77 | $354.00 | $95.58–$346.92 | 61% | Feb 28, 2026 source file |
Inpatient: lowest $5.23, median $5.23, highest $5.23.
As an outpatient, the same code is billed by 1 facility here, median $5.23 — 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.
4 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 83735 ($48.24). 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.
| Dignity Community Care San Luis Obispo, CARL-A-SUPERSAT 2008771E | $1.96 | file |
| Dignity Community Care San Luis Obispo, CARL-A-CRA 2008708D | $3.48 | file |
| Dignity Community Care San Luis Obispo, CARL-A-UMG 20477 | $3.58 | file |
| Dignity Community Care San Luis Obispo, CARL-A-FECMG 20105 | $3.81 | file |