C-peptide test cost in Peoria, IL — inpatient
In Peoria, IL, 5 hospitals list a cash price for C-peptide blood test as an inpatient: from $75.50 to $210.00, with a median of $210.00. The lowest listed price is at Hopedale Medical Complex — $134.50 less than the median here. Across Illinois, the median is $103.60 at 100 hospitals.
Cash prices at 5 facilities across 4 cities for code 84681, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Apr 15, 2026 and Apr 15, 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 Peoria, IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Hopedale Medical Complex lowest Hopedale, IL · (309) 449-3321 C-PEPTIDE | $75.50 | $107.86 | $20.39–$23.26 | 30% | — source file |
| Carle Eureka Hospital Eureka, IL · (309) 467-2371 C-Peptide, S Ref | $83.00 | $83.00 | $8.30–$54.86 | — | Apr 15, 2026 source file |
| Carle Eureka Hospital Eureka, IL · (309) 467-2371 C-Peptide Ref | $147.00 | $147.00 | $14.70–$97.17 | — | Apr 15, 2026 source file |
| Methodist Medical Center of Illinois Peoria, IL · (309) 672-5522 C-Peptide | $210.00 | $210.00 | $17.90–$105.00 | — | Apr 15, 2026 source file |
| Proctor Community Hospital Peoria, IL · (309) 691-1000 C-Peptide | $210.00 | $210.00 | $18.44–$105.00 | — | Apr 15, 2026 source file |
| Carle Health Pekin Hospital Pekin, IL · (309) 347-1151 C-Peptide | $210.00 | $210.00 | $17.90–$105.00 | — | Apr 15, 2026 source file |
| Carle Eureka Hospital Eureka, IL · (309) 467-2371 C-Peptide | $214.00 | $214.00 | $17.90–$141.45 | — | Apr 15, 2026 source file |
Inpatient: lowest $75.50, median $210.00, highest $210.00 — a 2.8× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $210.00 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 0 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 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.