Ammonia test cost in San Luis Obispo, CA
In San Luis Obispo-Paso Robles, CA, 1 hospital lists a cash price for ammonia blood test: from $18.04 to $18.04, with a median of $18.04. Across California, the median is $180.96 at 206 hospitals.
Cash prices at 1 facility for code 82140, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Feb 28, 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 San Luis Obispo-Paso Robles, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| French Hospital Medical Center lowest San Luis Obispo, CA · (805) 543-5353 AMMONIA | $18.04 | $46.00 | $12.42–$46.00 | 61% | Feb 28, 2026 source file |
| French Hospital Medical Center San Luis Obispo, CA · (805) 543-5353 RL-A-MAYO AMMO 24HR UR | $63.39 | $161.70 | $14.57–$161.70 | 61% | Feb 28, 2026 source file |
| French Hospital Medical Center San Luis Obispo, CA · (805) 543-5353 RL-A-AMMO U 3004262 | $72.80 | $185.70 | $14.57–$181.99 | 61% | Feb 28, 2026 source file |
Outpatient: lowest $18.04, median $18.04, highest $18.04.
As an inpatient, the same code is billed by 1 facility here, median $63.39. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
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.