Ammonia test cost in Nashville, TN — inpatient
In Nashville-Davidson--Murfreesboro--Franklin, TN, 8 hospitals list a cash price for ammonia blood test as an inpatient: from $18.94 to $97.20, with a median of $48.83. The lowest listed price is at Saint Thomas Hospital for Specialty Surgery — $29.89 less than the median here. Across Tennessee, the median is $48.83 at 89 hospitals.
Cash prices at 8 facilities across 6 cities for code 82140, as an inpatient (admitted to hospital) . Collected Sep 28, 2026; the hospital files themselves were last updated between Oct 1, 2025 and Sep 1, 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 Nashville-Davidson--Murfreesboro--Franklin, TN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Saint Thomas Hospital for Specialty Surgery lowest Nashville, TN Ammonia Level | $18.94 | $3.25 | $13.11–$584.01 | -483% | Apr 14, 2026 source file |
| Vanderbilt Wilson County Hospital Lebanon, TN · (615) 444-2250 HC UR 24HR KIDNEY STONE PNL AMMONIA - (LTH) | $20.30 | $70.00 | $13.81–$56.00 | 71% | Oct 1, 2025 source file |
| Vanderbilt University Medical Center Nashville, TN · (615) 322-3454 HC UR 24HR KIDNEY STONE PNL AMMONIA - (LTH) | $37.80 | $70.00 | $13.81–$56.00 | 46% | Oct 1, 2025 source file |
| Vanderbilt Wilson County Hospital Lebanon, TN · (615) 444-2250 HC AMMONIA BLOOD | $43.50 | $150.00 | $13.81–$120.00 | 71% | Oct 1, 2025 source file |
| Saint Thomas West Hospital Harding Pk Nashville, TN · (615) 222-2111 AMMONIA | $48.83 | $162.75 | $13.11–$56.45 | 70% | — source file |
| Stones River Hospital Woodbury, TN · (615) 563-4001 AMMONIA | $48.83 | $162.75 | $10.22–$56.45 | 70% | — source file |
| Saint Thomas Rutherford Hospital Murfreesboro, TN · (615) 396-4100 AMMONIA | $48.83 | $162.75 | $13.11–$56.45 | 70% | — source file |
| Vanderbilt University Medical Center Nashville, TN · (615) 322-3454 HC AMMONIA BLOOD | $81.00 | $150.00 | $13.65–$120.00 | 46% | Oct 1, 2025 source file |
| Williamson Medical Center Franklin, TN · (615) 435-5000 AMMONIA BLOOD | $95.40 | $169.20 | $62.77–$160.74 | 44% | — source file |
| Metro Nashville General Hospital Nashville, TN · (615) 341-4000 Ammonia Level | $97.20 | $162.00 | — | 40% | Sep 1, 2026 source file |
Inpatient: lowest $18.94, median $48.83, highest $97.20 — a 5.1× difference within the same market.
As an outpatient, the same code is billed by 22 facilities here, median $173.95 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 7 of 7 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.