C-peptide test cost in Green Bay, WI
In Green Bay, WI, 5 hospitals list a cash price for C-peptide blood test: from $44.91 to $87.50, with a median of $81.18. The lowest listed price is at Bellin Memorial Health — $36.27 less than the median here. Across Wisconsin, the median is $87.50 at 96 hospitals.
Cash prices at 5 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 Nov 21, 2025 and Jun 27, 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 Green Bay, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Bellin Memorial Health lowest Green Bay, WI · (920) 433-3500 C-PEPTIDE File of Jun 27, 2026 · source file | $44.91 | $97.00 | $48.02–$87.30 | 54% |
| St Clare Memorial Hospital Oconto Falls, WI · (920) 846-3444 HC C PEPTIDE source file | $81.18 | $123.00 | $7.34–$123.00 | 34% |
| St Vincent Hospital of the Hospital Sisters of the Third Order of St Francis Green Bay, WI · (920) 433-0111 HC C PEPTIDE source file | $81.18 | $123.00 | $7.34–$123.00 | 34% |
| St Marys Hospital Medical Center Green Bay, WI · (920) 498-4200 HC C PEPTIDE source file | $81.18 | $123.00 | $7.34–$123.00 | 34% |
| Aurora BayCare Medical Center Green Bay, WI · (920) 288-8000 C-PEPTIDE File of Nov 21, 2025 · source file | $87.50 | $175.00 | $15.41–$148.75 | 50% |
Outpatient: lowest $44.91, median $81.18, highest $87.50 — a 1.9× difference within the same market.
As an inpatient, the same code is billed by 5 facilities here, median $81.18. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 5 of 5 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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.