Ammonia test cost in Stockton, CA — inpatient
In Stockton-Lodi, CA, 4 hospitals list a cash price for ammonia blood test as an inpatient: from $207.27 to $387.00, with a median of $230.78. The lowest listed price is at St Joseph's Medical Center of Stockton — $23.51 less than the median here. Across California, the median is $180.96 at 207 hospitals.
Cash prices at 4 facilities across 3 cities for code 82140, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Feb 28, 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 Stockton-Lodi, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| St Joseph's Medical Center of Stockton lowest Stockton, CA · (209) 943-2000 SJM-AMMONIA File of Feb 28, 2026 · source file | $207.27 | $705.00 | $507.60–$578.10 | 71% |
| Kaiser Foundation Hospital - Manteca Manteca, CA · (209) 825-3700 ASSAY OF AMMONIA source file | $222.88 | $398.00 | $13.00–$40.00 | 44% |
| St. Joseph's Behavioral Health Center Stockton, CA AMMONIA File of Feb 28, 2026 · source file | $238.68 | $418.00 | $209.00–$321.86 | 43% |
| St Joseph's Medical Center of Stockton Stockton, CA · (209) 943-2000 AMMONIA File of Feb 28, 2026 · source file | $259.02 | $881.00 | $634.32–$722.42 | 71% |
| Sutter Tracy Community Hospital Tracy, CA · (209) 835-1500 HCHG AMMONIA File of Apr 1, 2026 · source file | $387.00 | $387.00 | — | — |
| St. Joseph's Behavioral Health Center Stockton, CA SJM-AMMONIA File of Feb 28, 2026 · source file | $391.14 | $685.00 | $342.50–$527.45 | 43% |
Inpatient: lowest $207.27, median $230.78, highest $387.00 — a 1.9× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $238.68 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 2 of 3 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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.
2 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 82140 ($90.62). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Hospital | Cash price | File |
|---|---|---|
| St Joseph's Medical Center of Stockton Stockton, CARL-Q-AMMONIA URINE | $2.45 | file |
| St. Joseph's Behavioral Health Center Stockton, CARL-Q-AMMONIA URINE | $4.76 | file |