Magnesium test cost in New Orleans, LA
In New Orleans-Metairie, LA, 8 hospitals list a cash price for magnesium blood test: from $12.60 to $50.96, with a median of $20.62. The lowest listed price is at Lakeside Hospital and 2 other hospitals — $8.02 less than the median here. Across Louisiana, the median is $24.31 at 13 hospitals.
Cash prices at 8 facilities across 3 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 Jun 24, 2026 and Jul 1, 2026.
Lowest$12.60Lakeside Hospital + 2 more
Median$20.62half pay less
Highest$50.96in this market
Difference4.0×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 New Orleans-Metairie, LA.
median
Lowest $12.60Highest $73.92
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Lakeside Hospital lowest Metairie, LA Magnesium RBC | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital lowest Metairie, LA Labcorp Magnesium Urine | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital lowest Metairie, LA · (504) 988-5263 Magnesium RBC | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| Tulane Medical Center lowest New Orleans, LA HC Assay of Magnesium | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jun 25, 2026 source file |
| Lakeside Hospital lowest Metairie, LA HC Assay of Magnesium | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| Tulane Medical Center lowest New Orleans, LA Labcorp Magnesium Urine | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jun 25, 2026 source file |
| Tulane Medical Center lowest New Orleans, LA Magnesium RBC | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jun 25, 2026 source file |
| East Jefferson General Hospital lowest Metairie, LA · (504) 988-5263 Labcorp Magnesium Urine | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital lowest Metairie, LA · (504) 988-5263 HC Assay of Magnesium | $12.60 | $90.00 | $10.05–$90.00 | 86% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Omega-Magnesium Urine | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 HC Assay of Magnesium | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Magnesium Fecal | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Magnesium RBC | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Labcorp Magnesium Urine | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Magnesium Serum | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| University Med Center New Orleans, LA · (504) 702-3000 Magnesium Urine | $19.80 | $90.00 | $10.05–$90.00 | 78% | Jul 1, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 HC Assay of Magnesium | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Magnesium RBC | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Magnesium Fecal | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Magnesium Serum | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Labcorp Magnesium Urine | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Omega-Magnesium Urine | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Magnesium Urine | $21.44 | $134.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
| New Orleans East Hospital New Orleans, LA · (504) 592-6600 Magnesium Serum | $25.28 | $158.00 | $10.05–$94.80 | 84% | Jun 24, 2026 source file |
| New Orleans East Hospital New Orleans, LA · (504) 592-6600 Labcorp Magnesium Urine | $25.28 | $158.00 | $10.05–$94.80 | 84% | Jun 24, 2026 source file |
| New Orleans East Hospital New Orleans, LA · (504) 592-6600 Magnesium Urine | $25.28 | $158.00 | $10.05–$94.80 | 84% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Magnesium RBC | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Magnesium Urine | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Magnesium Serum | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Magnesium Fecal | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 HC Assay of Magnesium | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Labcorp Magnesium Urine | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Childrens Hospital New Orleans, LA · (504) 899-9511 Omega-Magnesium Urine | $42.66 | $158.00 | $10.87–$77.25 | 73% | Jun 24, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Labcorp Magnesium Urine | $50.96 | $364.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 HC Assay of Magnesium | $50.96 | $364.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Magnesium Fecal | $50.96 | $364.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Omega-Magnesium Urine | $50.96 | $364.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Magnesium RBC | $50.96 | $364.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Magnesium Serum | $54.74 | $391.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Touro Infirmary New Orleans, LA · (504) 897-8247 Magnesium Urine | $54.74 | $391.00 | $10.05–$8.74 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital Metairie, LA Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Tulane Medical Center New Orleans, LA Magnesium Serum | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| Tulane Medical Center New Orleans, LA Omega-Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| Tulane Medical Center New Orleans, LA Ej Ref Lab Magnesium RBC | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| Tulane Medical Center New Orleans, LA Labcorp Magnesium Blood | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| Lakeside Hospital Metairie, LA Magnesium Fecal | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Labcorp Magnesium Blood | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Ej Ref Lab Magnesium RBC | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Omega-Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Magnesium Serum | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| East Jefferson General Hospital Metairie, LA · (504) 988-5263 Magnesium Fecal | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital Metairie, LA Labcorp Magnesium Blood | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital Metairie, LA Ej Ref Lab Magnesium RBC | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital Metairie, LA Omega-Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Lakeside Hospital Metairie, LA Magnesium Serum | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jul 1, 2026 source file |
| Tulane Medical Center New Orleans, LA Magnesium Fecal | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| Tulane Medical Center New Orleans, LA Magnesium Urine | $64.68 | $462.00 | $10.05–$96.56 | 86% | Jun 25, 2026 source file |
| West Jefferson Medical Center Marrero, LA · (504) 347-5511 Ej Ref Lab Magnesium RBC | $73.92 | $462.00 | $10.05–$9.78 | 84% | Jun 30, 2026 source file |
Outpatient: lowest $12.60, median $20.62, highest $50.96 — a 4.0× difference within the same market.
Cash or insurance?
At 6 of 8 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.
1 row held back from this comparison
It is 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.
| Childrens Hospital New Orleans, LALabcorp Magnesium Blood | $2.70 | file |