SelfPayRates
Lab tests CPT 84681 Inpatient — admitted to hospital

C-peptide test cost in Spokane, WA — inpatient

In Spokane-Spokane Valley, WA, 4 hospitals list a cash price for C-peptide blood test as an inpatient: from $130.90 to $180.60, with a median of $152.25. The lowest listed price is at Providence St Joseph Hospital — $21.35 less than the median here. Across Washington, the median is $106.57 at 59 hospitals.

Cash prices at 4 facilities across 3 cities for code 84681, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.

Lowest$130.90Providence St Joseph Hospital
Median$152.25half of hospitals charge less
Highest$180.60in this market
Difference1.4×highest vs lowest

Where each hospital's price falls

Each dot is one hospital's cash price on a scale from the lowest to the highest in Spokane-Spokane Valley, WA.

median
Lowest $130.90Highest $180.60

Hospitals, cheapest first

HospitalCash priceList priceInsurers payOff list
Providence St Joseph Hospital lowest Chewelah, WA · (509) 935-8211 HC ASSAY OF C-PEPTIDE+1 more line at this price File of Apr 1, 2026 · source file $130.90 $187.00 — 30%
Prov Sacred Hrt Medical Center & Childs Hospital Spokane, WA · (509) 474-3131 HC ASSAY OF C-PEPTIDE+1 more line at this price File of Apr 1, 2026 · source file $149.80 $214.00 — 30%
Providence Holy Family Hospital Spokane, WA · (509) 482-0111 HC ASSAY OF C-PEPTIDE+1 more line at this price File of Apr 1, 2026 · source file $154.70 $221.00 — 30%
Providence Mount Carmel Hospital Colville, WA · (509) 684-2561 HC ASSAY OF C-PEPTIDE+1 more line at this price File of Apr 1, 2026 · source file $180.60 $258.00 — 30%
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.

Inpatient: lowest $130.90, median $152.25, highest $180.60 — a 1.4× difference within the same market.

As an outpatient, the same code is billed by 5 facilities here, median $148.70 — that is the price to compare if you are not being admitted.

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.