Lab tests CPT 82140 Inpatient — admitted to hospital

Ammonia test cost in St. Johnsbury, VT — inpatient

In St. Johnsbury, VT, 1 hospital lists a cash price for ammonia blood test as an inpatient: from $27.75 to $27.75, with a median of $27.75. Across Vermont, the median is $132.65 at 11 hospitals.

Cash prices at 1 facility for code 82140, as an inpatient (admitted to hospital) . Collected Sep 22, 2026; the hospital files themselves were last updated between — and —.

Lowest$27.75Northeastern Vermont Regional Hospital

Median$27.75half of hospitals charge less

Highest$27.75in this market

Difference1.0×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 St. Johnsbury, VT.

median

Lowest $27.75Highest $244.50

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
Northeastern Vermont Regional Hospital lowest St. Johnsbury, VT · (802) 748-7400 MAYO SUPERSATURATION 24HR URIN source file	$27.75	$37.00	$13.32–$35.15	25%
Northeastern Vermont Regional Hospital St. Johnsbury, VT · (802) 748-7400 MAYO AMMONIUM RANDOM URINE source file	$107.25	$143.00	$14.21–$135.85	25%
Northeastern Vermont Regional Hospital St. Johnsbury, VT · (802) 748-7400 AMMONIA source file	$244.50	$326.00	$14.21–$309.70	25%

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 $27.75, median $27.75, highest $27.75.

As an outpatient, the same code is billed by 1 facility here, median $27.75 — that is the price to compare if you are not being admitted.

Cash or insurance?

At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. 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

An ammonia test measures ammonia in the blood. It is used for confusion or drowsiness in people with liver disease and for some rare inherited disorders in newborns.

What the price covers

The price usually covers running the test. The blood draw (36415) is often billed as a separate line.