C-peptide test cost in Appleton, WI
In Appleton, WI, 4 hospitals list a cash price for C-peptide blood test: from $18.81 to $40.99, with a median of $34.46. The lowest listed price is at Ascension NE Wisconsin - St Elizabeth Campus — $15.65 less than the median here. Across Wisconsin, the median is $87.50 at 96 hospitals.
Cash prices at 4 facilities across 2 cities for code 84681, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 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 Appleton, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Ascension NE Wisconsin - St Elizabeth Campus lowest Appleton, WI · (920) 738-2000 HC ASSAY OF C-PEPTIDE | $18.81 | $33.00 | $7.47–$28.72 | 43% | — source file |
| Ascension Calumet Hospital Chilton, WI · (920) 849-2386 HC ASSAY OF C-PEPTIDE | $27.93 | $49.00 | $7.47–$39.96 | 43% | — source file |
| ThedaCare Regional Medical Center-OSP Appleton, WI C-PEPTIDE ASSAY | $40.99 | $73.20 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Appleton Appleton, WI · (920) 731-4101 C-PEPTIDE ASSAY | $40.99 | $73.20 | — | 44% | — source file |
Outpatient: lowest $18.81, median $34.46, highest $40.99 — a 2.2× difference within the same market.
Cash or insurance?
At 2 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 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.