Lab tests CPT 84681 Inpatient — admitted to hospital

C-peptide test cost in Napa, CA — inpatient

In Napa, CA, 1 hospital lists a cash price for C-peptide blood test as an inpatient: from $32.26 to $32.26, with a median of $32.26. Across California, the median is $63.84 at 144 hospitals.

Cash prices at 1 facility 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$32.26Providence Queen of the Valley Medical Center

Median$32.26half of hospitals charge less

Highest$32.26in this market

Difference1.0×highest vs lowest

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
Providence Queen of the Valley Medical Center Napa, CA · (707) 252-4411 HC ASSAY OF C-PEPTIDE CDM File of Apr 1, 2026 · source file	$32.26	$63.25	—	49%

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 $32.26, median $32.26, highest $32.26.

As an outpatient, the same code is billed by 1 facility here, median $32.26 — 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.