Phosphorus test cost in Baton Rouge, LA — inpatient
In Baton Rouge, LA, 4 hospitals list a cash price for phosphorus (phosphate) blood test as an inpatient: from $6.00 to $45.89, with a median of $20.78. The lowest listed price is at Ochsner St Mary — $14.78 less than the median here. Across Louisiana, the median is $16.78 at 56 hospitals.
Cash prices at 4 facilities across 3 cities for code 84100, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Baton Rouge, LA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Ochsner St Mary lowest Morgan City, LA · (985) 384-2200 HC PHOSPHORUS, FECES | $6.00 | $30.00 | — | 80% | — source file |
| Ochsner St Mary lowest Morgan City, LA · (985) 384-2200 HC PHOSPHORUS | $6.00 | $30.00 | — | 80% | — source file |
| Ochsner Medical Center - Baton Rouge Baton Rouge, LA · (225) 752-2470 HC PHOSPHORUS | $11.52 | $36.00 | — | 68% | — source file |
| Ochsner Medical Center - Baton Rouge Baton Rouge, LA · (225) 752-2470 HC PHOSPHORUS, FECES | $11.52 | $36.00 | — | 68% | — source file |
| St Helena Parish Hospital Greensburg, LA · (225) 222-6111 PHOSPHORUS | $30.04 | $30.04 | $4.07–$29.74 | — | — source file |
| St Helena Parish Hospital Greensburg, LA · (225) 222-6111 PHOSPHORUS (RL) | $30.04 | $30.04 | $4.07–$29.74 | — | — source file |
| Ochsner Medical Center - Baton Rouge Baton Rouge, LA · (225) 752-2470 HC CATHARTIC LAXATIVE PROF - PHOSPHORUS, FECES | $42.24 | $132.00 | — | 68% | — source file |
| Baton Rouge General Medical Center Baton Rouge, LA · (225) 387-7767 PHOSPHOROUS | $45.89 | $65.55 | $2.37–$50.47 | 30% | — source file |
| St Helena Parish Hospital Greensburg, LA · (225) 222-6111 PHOSPHORUS INORGANIC (PHOSPHATE) | $222.04 | $222.04 | $4.07–$219.82 | — | — source file |
Inpatient: lowest $6.00, median $20.78, highest $45.89 — a 7.6× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $30.04 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 1 of 2 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 phosphorus test measures phosphate in the blood. It is used with calcium for kidney disease, bone disease and parathyroid problems.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.