Ammonia test cost in Spokane, WA — inpatient
In Spokane-Spokane Valley, WA, 5 hospitals list a cash price for ammonia blood test as an inpatient: from $88.20 to $214.20, with a median of $182.00. The lowest listed price is at Providence St Luke's Rehabilitation Medical Center — $93.80 less than the median here. Across Washington, the median is $114.40 at 59 hospitals.
Cash prices at 5 facilities across 3 cities for code 82140, 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.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Spokane-Spokane Valley, WA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Providence St Luke's Rehabilitation Medical Center lowest Spokane, WA HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $88.20 | $126.00 | — | 30% |
| Providence St Joseph Hospital Chewelah, WA · (509) 935-8211 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $135.10 | $193.00 | — | 30% |
| Prov Sacred Hrt Medical Center & Childs Hospital Spokane, WA · (509) 474-3131 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $182.00 | $260.00 | — | 30% |
| Providence Mount Carmel Hospital Colville, WA · (509) 684-2561 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $186.90 | $267.00 | — | 30% |
| Providence Holy Family Hospital Spokane, WA · (509) 482-0111 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $214.20 | $306.00 | — | 30% |
Inpatient: lowest $88.20, median $182.00, highest $214.20 — a 2.4× difference within the same market.
As an outpatient, the same code is billed by 6 facilities here, median $130.75 — that is the price to compare if you are not being admitted.
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.