Ammonia test cost in Kansas City, MO
In Kansas City, MO-KS, 20 hospitals list a cash price for ammonia blood test: from $14.00 to $690.49, with a median of $182.18. The lowest listed price is at St Joseph Medical Center and 2 other hospitals — $168.18 less than the median here. Across Missouri, the median is $76.50 at 64 hospitals.
Cash prices at 20 facilities across 13 cities for code 82140, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Mar 6, 2026 and Sep 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 Kansas City, MO-KS.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| St Joseph Medical Center lowest Kansas City, MO · (816) 942-4400 Hc Assay Of Ammonia File of Mar 17, 2026 · source file | $14.00 | $245.53 | $12.38–$245.53 | 94% |
| Saint John Hospital lowest Leavenworth, KS · (913) 680-6000 Hc Assay Of Ammonia File of Mar 17, 2026 · source file | $14.00 | $265.19 | $12.38–$212.15 | 95% |
| Providence Medical Center lowest Kansas City, KS · (913) 596-4000 Hc Assay Of Ammonia File of Mar 17, 2026 · source file | $14.00 | $267.66 | $12.38–$247.32 | 95% |
| Liberty Hospital Liberty, MO · (816) 781-7200 AMMONIA source file | $43.00 | $157.00 | $43.80–$128.11 | 73% |
| NKC Health North Kansas City, MO · (816) 691-2000 AMMONIA LEVEL File of Mar 6, 2026 · source file | $58.29 | $201.00 | $13.50–$164.42 | 71% |
| Children's Mercy Hospital Kansas City, MO · (816) 234-3000 AMMONIA PLASMA MAIN source file | $82.08 | $171.00 | $13.00–$153.90 | 52% |
| Children's Mercy Hospital Kansas Overland Park, KS · (913) 696-8000 AMMONIA PLASMA MAIN source file | $82.08 | $171.00 | $13.00–$153.90 | 52% |
| Cass Regional Medical Center Harrisonville, MO · (816) 380-5888 Ammonia group+1 more line at this price File of Apr 7, 2026 · source file | $133.70 | $191.00 | $14.57–$185.08 | 30% |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC AMMONIA LEVEL File of Apr 1, 2026 · source file | $181.16 | $181.16 | — | — |
| AdventHealth Shawnee Mission Shawnee Mission, KS · (913) 676-2152 HC AMMONIA LEVEL File of Apr 1, 2026 · source file | $181.16 | $181.16 | — | — |
| Bates County Memorial Hospital Butler, MO · (660) 200-7000 AMMONIA LEVEL File of Apr 20, 2026 · source file | $183.20 | $261.71 | $14.57–$222.45 | 30% |
| Rehabilitation Hospital of Overland Park Overland Park, KS Ammonia File of Aug 6, 2026 · source file | $204.85 | $204.85 | $11.66–$184.37 | — |
| Bates County Memorial Hospital Butler, MO · (660) 200-7000 AMMONIA URINE File of Apr 20, 2026 · source file | $309.27 | $441.81 | $14.57–$375.54 | 30% |
| Overland Park Regional Medical Center Olathe, KS · (913) 541-5000 AMMONIA File of Sep 1, 2026 · source file | $338.99 | $338.99 | $44.07–$254.24 | — |
| Belton Regional Medical Center Kansas City, MO · (816) 348-1200 AMMONIA+1 more line at this price File of Sep 1, 2026 · source file | $368.40 | $368.40 | $7.86–$331.56 | — |
| Research Psychiatric Center Kansas City, MO Ammonia +1 more line at this price File of Sep 1, 2026 · source file | $376.52 | $376.52 | $7.86–$376.52 | — |
| Research Medical Center Kansas City, MO · (816) 276-4000 Ammonia +1 more line at this price File of Sep 1, 2026 · source file | $376.52 | $376.52 | $7.86–$376.52 | — |
| Lafayette Regional Health Center Lexington, MO · (660) 259-2203 Ammonia +1 more line at this price File of Sep 1, 2026 · source file | $466.60 | $466.60 | $14.57–$466.60 | — |
| Centerpoint Medical Center Independence, MO · (816) 698-7000 Ammonia +1 more line at this price File of Sep 1, 2026 · source file | $483.28 | $483.28 | $12.38–$434.95 | — |
| Lee's Summit Medical Center Lee's Summit, MO · (816) 282-5000 AMMONIA+1 more line at this price File of Sep 1, 2026 · source file | $596.78 | $596.78 | $7.86–$507.26 | — |
| Menorah Medical Center Overland Park, KS · (913) 498-6000 Ammonia +1 more line at this price File of Sep 1, 2026 · source file | $690.49 | $690.49 | $7.86–$552.39 | — |
Outpatient: lowest $14.00, median $182.18, highest $690.49 — a 49.3× difference within the same market.
As an inpatient, the same code is billed by 9 facilities here, median $133.70. 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 9 of 18 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.