C-peptide test cost in Baton Rouge, LA — inpatient
In Baton Rouge, LA, 5 hospitals list a cash price for C-peptide blood test as an inpatient: from $14.37 to $93.62, with a median of $46.40. The lowest listed price is at St Helena Parish Hospital — $32.03 less than the median here. Across Louisiana, the median is $55.42 at 56 hospitals.
Cash prices at 5 facilities across 4 cities for code 84681, 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 |
|---|---|---|---|---|---|
| St Helena Parish Hospital lowest Greensburg, LA · (225) 222-6111 C-PEPTIDE LEVEL (SERUM) | $14.37 | $14.37 | $9.89–$20.39 | — | — source file |
| Ochsner St Mary Morgan City, LA · (985) 384-2200 HC C PEPTIDE | $24.40 | $122.00 | — | 80% | — source file |
| Ochsner Medical Center - Baton Rouge Baton Rouge, LA · (225) 752-2470 HC C PEPTIDE | $46.40 | $145.00 | — | 68% | — source file |
| Baton Rouge General Medical Center Baton Rouge, LA · (225) 387-7767 C-PEPTIDE | $87.43 | $124.90 | $10.41–$96.17 | 30% | — source file |
| West Feliciana Parish Hospital St Francisville, LA · (225) 635-3811 O Z/ C-PEPTIDE | $93.62 | $156.04 | $24.27–$171.64 | 40% | — source file |
| West Feliciana Parish Hospital St Francisville, LA · (225) 635-3811 .2 INSULIN & PEPTIDE SERUM | $93.62 | $156.04 | $24.27–$171.64 | 40% | — source file |
| West Feliciana Parish Hospital St Francisville, LA · (225) 635-3811 Z/ C-PEPTIDE | $93.62 | $156.04 | $24.27–$171.64 | 40% | — source file |
| West Feliciana Parish Hospital St Francisville, LA · (225) 635-3811 O .2 INSULIN & PEPTIDE SERUM | $93.62 | $156.04 | $24.27–$171.64 | 40% | — source file |
| St Helena Parish Hospital Greensburg, LA · (225) 222-6111 C-PEPTIDE, ULTRASENSITIVE | $275.00 | $275.00 | $17.88–$275.00 | — | — source file |
Inpatient: lowest $14.37, median $46.40, highest $93.62 — a 6.5× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $36.80 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 3 of 3 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 C-peptide test shows how much insulin the pancreas is making. It helps tell type 1 from type 2 diabetes and find the cause of low blood sugar.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.