Ammonia test cost in Ann Arbor, MI — inpatient
In Ann Arbor, MI, 3 hospitals list a cash price for ammonia blood test as an inpatient: from $10.00 to $82.70, with a median of $70.85. The lowest listed price is at University of Michigan Health — $60.85 less than the median here. Across Michigan, the median is $65.00 at 86 hospitals.
Cash prices at 3 facilities across 3 cities for code 82140, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 26, 2026 and Mar 31, 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 Ann Arbor, MI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| University of Michigan Health lowest Ann Arbor, MI · (734) 764-1505 HC-Lab-Supersaturation UR Random Ammonium File of Mar 31, 2026 · source file | $10.00 | $25.00 | $10.75–$26.57 | 60% |
| University of Michigan Health Ann Arbor, MI · (734) 764-1505 HC-Lab-Ammonia File of Mar 31, 2026 · source file | $58.40 | $146.00 | $62.78–$155.18 | 60% |
| St Joseph Mercy Chelsea Chelsea, MI · (734) 475-3911 HC Ammonia File of Mar 31, 2026 · source file | $70.85 | $109.00 | $7.97–$109.00 | 35% |
| Forest Health Medical Center Ypsilanti, MI · (734) 547-4700 AMMONIA File of Feb 26, 2026 · source file | $82.70 | $82.70 | $14.57–$57.89 | — |
Inpatient: lowest $10.00, median $70.85, highest $82.70 — a 8.3× difference within the same market.
As an outpatient, the same code is billed by 3 facilities here, median $70.85 — 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 ($90.00). 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 |
|---|---|---|
| University of Michigan Health Ann Arbor, MIHC-Lab-Supersaturation Urine Ammonium | $7.20 | file |
| St Joseph Mercy Chelsea Chelsea, MIHC Warde 3717400 Ammonia 24 Hour Urine | $8.45 | file |