Ammonia test cost in Los Angeles, CA — inpatient
In Los Angeles-Long Beach-Anaheim, CA, 39 hospitals list a cash price for ammonia blood test as an inpatient: from $16.80 to $450.98, with a median of $180.96. The lowest listed price is at Mission Hospital Regional Med Center and 2 other hospitals — $164.16 less than the median here. Across California, the median is $180.96 at 203 hospitals.
Cash prices at 39 facilities across 25 cities for code 82140, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Nov 26, 2025 and Jun 15, 2026.
Lowest$16.80Mission Hospital Regional Med Center + 2 more
Median$180.96half of hospitals charge less
Highest$450.98in this market
Difference26.8×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Los Angeles-Long Beach-Anaheim, CA.
median
Lowest $16.80Highest $450.98
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Mission Hospital Regional Med Center lowest Mission Viejo, CA · (949) 364-1400 HC ASSAY OF AMMONIA CDM File of Apr 1, 2026 · source file | $16.80 | $35.00 | — | 52% |
| St Jude Hospital lowest Fullerton, CA · (714) 992-3000 HC ASSAY OF AMMONIA CDM File of Apr 1, 2026 · source file | $16.80 | $35.00 | — | 52% |
| Providence St Joseph Hospital Orange lowest Orange, CA · (714) 633-9111 HC ASSAY OF AMMONIA CDM File of Apr 1, 2026 · source file | $16.80 | $35.00 | — | 52% |
| UCI Health - Placentia Linda Orange, CA · (714) 456-7890 AMMONIA File of Apr 1, 2026 · source file | $19.20 | $48.00 | — | 60% |
| UCI Health - Los Alamitos Orange, CA · (562) 799-3220 AMMONIA File of Apr 1, 2026 · source file | $19.20 | $48.00 | — | 60% |
| UCI Health-Orange Orange, CA · (714) 456-7890 HB ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $19.20 | $48.00 | — | 60% |
| UCI Health - Fountain Valley Orange, CA · (714) 966-7200 AMMONIA File of Apr 1, 2026 · source file | $19.20 | $48.00 | — | 60% |
| Glendale Memorial Hospital & Health Center Glendale, CA · (818) 502-1900 AMMONIA File of Feb 28, 2026 · source file | $51.19 | $157.00 | $87.92–$125.60 | 67% |
| Mission Hospital Regional Med Center Mission Viejo, CA · (949) 364-1400 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $59.04 | $123.00 | — | 52% |
| Hoag Memorial Hospital Presbyterian Newport Beach, CA · (949) 764-4624 HC Assay of Ammonia # File of Apr 1, 2026 · source file | $66.92 | $102.95 | — | 35% |
| St Mary Medical Center Long Beach, CA · (562) 491-9000 AMMONIA File of Feb 28, 2026 · source file | $72.24 | $168.00 | $117.60–$168.00 | 57% |
| Keck Hospital of USC Los Angeles, CA · (323) 442-8656 Assay Of Ammonia File of Apr 1, 2026 · source file | $77.50 | $77.50 | — | — |
| Chapman Global Medical Center Orange, CA · (714) 633-0011 AMMONIA File of May 6, 2026 · source file | $80.00 | $80.00 | $42.00–$80.00 | — |
| Orange County Global Medical Center Santa Ana, CA · (714) 953-3500 AMMONIA File of Jun 15, 2026 · source file | $80.00 | $80.00 | $48.00–$80.00 | — |
| Anaheim Global Medical Center Anaheim, CA · (714) 533-6220 AMMONIA File of Jun 15, 2026 · source file | $80.00 | $80.00 | $42.00–$80.00 | — |
| Providence St Joseph Hospital Orange Orange, CA · (714) 633-9111 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $85.44 | $178.00 | — | 52% |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $98.70 | $282.00 | — | 65% |
| St Jude Hospital Fullerton, CA · (714) 992-3000 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $116.64 | $243.00 | — | 52% |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $161.00 | $460.00 | — | 65% |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $161.00 | $460.00 | — | 65% |
| USC Kenneth Norris Jr Cancer Hospital Los Angeles, CA Assay Of Ammonia File of Apr 1, 2026 · source file | $178.50 | $178.50 | — | — |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $178.85 | $511.00 | — | 65% |
| Kaiser Foundation Hospital - West LA Los Angeles, CA · (213) 857-2201 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Baldwin Park Baldwin Park, CA · (626) 851-1011 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Fnd Hospital - Irvine Irvine, CA · (714) 279-4000 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Panorama City Panorama City, CA · (818) 375-2000 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA · (818) 719-3800 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Los Angeles Los Angeles, CA · (323) 783-4011 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Downey Downey, CA · (562) 461-6007 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - South Bay Harbor City, CA · (310) 325-5111 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Kaiser Foundation Hospital - Orange County - Anaheim Anaheim, CA · (714) 279-4000 ASSAY OF AMMONIA File of Apr 1, 2026 · source file | $180.96 | $348.00 | $10.00–$30.00 | 48% |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $188.30 | $538.00 | — | 65% |
| California Hospital Medical Center LA Los Angeles, CA · (213) 748-2411 AMMONIA File of Feb 28, 2026 · source file | $191.58 | $395.00 | $272.55–$312.05 | 51% |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC ASSAY OF AMMONIA LAB File of Apr 1, 2026 · source file | $203.70 | $582.00 | — | 65% |
| Childrens Hospital at Mission - Cerner Mission Viejo, CA · (949) 365-2408 AMMONIA File of Mar 18, 2026 · source file | $227.00 | $227.00 | $102.15–$227.00 | — |
| UCI Health - Lakewood Orange, CA · (562) 602-6751 AMMONIA File of Apr 1, 2026 · source file | $242.40 | $606.00 | — | 60% |
| Foothill Regional Medical Center Tustin, CA · (714) 619-7700 AMMONIA (Chem) File of Mar 18, 2026 · source file | $248.66 | $248.66 | $174.06–$213.85 | — |
| Los Angeles Community Hospital Los Angeles, CA · (323) 267-0477 AMMONIA (Chem) File of Mar 18, 2026 · source file | $267.08 | $267.08 | $71.04–$229.69 | — |
| Southern California Hospital at Van Nuys D/P Aph Van Nuys, CA · (323) 462-2271 AMMONIA (Chem) File of Mar 18, 2026 · source file | $270.54 | $270.54 | $189.38–$232.66 | — |
| Southern California Hospital at Hollywood Hollywood, CA · (323) 462-2271 AMMONIA (Chem) File of Mar 18, 2026 · source file | $270.54 | $270.54 | $189.38–$232.66 | — |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 HB LAB AMMONIA BL ER File of Nov 26, 2025 · source file | $394.18 | $606.43 | $13,270.00–$14,761.00 | 35% |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 HB LAB AMMONIA BL ER File of Nov 26, 2025 · source file | $450.98 | $693.81 | $7,175.00–$9,712.00 | 35% |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Inpatient: lowest $16.80, median $180.96, highest $450.98 — a 26.8× difference within the same market.
As an outpatient, the same code is billed by 50 facilities here, median $80.00 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 5 of 22 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 5 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.
6 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 82140 ($89.76). 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 |
|---|---|---|
| Childrens Hospital at Mission - Cerner Mission Viejo, CAHC MAGNESIUM QUANT URINE | $5.00 | file |
| Memorial Hospital of Gardena Gardena, CAASSAY OF AMMONIA | $6.09 | file |
| Community Hospital of Huntington Park Huntington Park, CAASSAY OF AMMONIA | $6.09 | file |
| Coast Plaza Doctors Hospital Norwalk, CAASSAY OF AMMONIA | $6.09 | file |
| East Los Angeles Doctors Hospital Los Angeles, CAASSAY OF AMMONIA | $6.09 | file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CAHC Assay of Ammonia - Hfpa | $8.66 | file |
File Link to the hospital's own price file.