Ammonia test cost in Walla Walla, WA
In Walla Walla, WA, 1 hospital lists a cash price for ammonia blood test: from $14.70 to $14.70, with a median of $14.70. Across Washington, the median is $114.40 at 59 hospitals.
Cash prices at 1 facility for code 82140, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 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 Walla Walla, WA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Providence St Mary Medical Center lowest Walla Walla, WA · (509) 522-5900 HC ASSAY OF AMMONIA LAB | $14.70 | $21.00 | — | 30% | Apr 1, 2026 source file |
| Providence St Mary Medical Center Walla Walla, WA · (509) 522-5900 HC AMMONIA (RL) | $20.30 | $29.00 | — | 30% | Apr 1, 2026 source file |
Outpatient: lowest $14.70, median $14.70, highest $14.70.
As an inpatient, the same code is billed by 1 facility here, median $14.70. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
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.