Ammonia test cost in Knoxville, TN — inpatient
In Knoxville, TN, 4 hospitals list a cash price for ammonia blood test as an inpatient: from $13.86 to $121.26, with a median of $48.55. The lowest listed price is at Fort Loudoun Medical Center and 1 other hospital — $34.69 less than the median here. Across Tennessee, the median is $48.83 at 88 hospitals.
Cash prices at 4 facilities across 4 cities for code 82140, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Aug 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 Knoxville, TN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Fort Loudoun Medical Center lowest Lenoir City, TN · (865) 271-6000 AMMONIA File of Aug 27, 2026 · source file | $13.86 | $42.00 | $6.56–$37.80 | 67% |
| Fort Sanders Regional Medical Center lowest Knoxville, TN · (865) 541-1101 AMMONIA File of Aug 5, 2026 · source file | $13.86 | $42.00 | $6.56–$37.80 | 67% |
| Physicians Regional Medical Center Powell, TN · (865) 545-8000 AMMONIA+1 more line at this price File of Apr 1, 2026 · source file | $83.23 | $367.45 | $71.29–$367.45 | 77% |
| Lafollette Medical Center Lafollette, TN · (423) 907-1200 AMMONIA+1 more line at this price File of Apr 1, 2026 · source file | $121.26 | $367.45 | $63.94–$367.45 | 67% |
Inpatient: lowest $13.86, median $48.55, highest $121.26 — a 8.7× difference within the same market.
As an outpatient, the same code is billed by 8 facilities here, median $48.51 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 4 of 4 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
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.