Ammonia test cost in Los Angeles, CA
In Los Angeles-Long Beach-Anaheim, CA, 50 hospitals list a cash price for ammonia blood test: from $14.00 to $450.98, with a median of $80.00. The lowest listed price is at La Palma Intercommunity Hospital and 7 other hospitals — $66.00 less than the median here. Across California, the median is $180.96 at 206 hospitals.
Cash prices at 50 facilities across 35 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 Nov 26, 2025 and Sep 1, 2026.
Lowest$14.00La Palma Intercommunity Hospital + 7 more
Median$80.00half pay less
Highest$450.98in this market
Difference32.2×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 $14.00Highest $450.98
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| La Palma Intercommunity Hospital lowest La Palma, CA · (714) 670-7400 Hc Assay Of Ammonia | $14.00 | $437.93 | $14.57–$437.93 | 97% | Sep 1, 2026 source file |
| San Dimas Community Hospital lowest San Dimas, CA · (909) 599-6811 Hc Assay Of Ammonia | $14.00 | $399.09 | $13.84–$399.09 | 96% | Sep 1, 2026 source file |
| Encino Hospital Medical Center lowest Encino, CA · (818) 995-5000 AMMONIA | $14.00 | $222.60 | $14.57–$222.60 | 94% | Sep 1, 2026 source file |
| West Anaheim Medical Center lowest Anaheim, CA · (714) 827-3000 Hc Assay Of Ammonia | $14.00 | $437.93 | $14.57–$437.93 | 97% | Sep 1, 2026 source file |
| St Francis Medical Center lowest Lynwood, CA · (310) 900-8900 Hc Assay Of Ammonia | $14.00 | $292.00 | $14.57–$262.80 | 95% | Sep 1, 2026 source file |
| Sherman Oaks Hospital lowest Sherman Oaks, CA · (818) 981-7111 AMMONIA BLOOD | $14.00 | $150.00 | $14.57–$150.00 | 91% | Sep 1, 2026 source file |
| Centinela Hospital Medical Center lowest Inglewood, CA · (310) 673-4660 AMMONIA | $14.00 | $396.00 | $14.57–$396.00 | 96% | Sep 1, 2026 source file |
| Garden Grove Hospital Medical Center lowest Garden Grove, CA · (714) 537-5160 Hc Assay Of Ammonia | $14.00 | $437.93 | $14.57–$437.93 | 97% | Sep 1, 2026 source file |
| St Mary Medical Center Long Beach, CA · (562) 491-9000 AMMONIA | $16.77 | $39.00 | $9.75–$92.90 | 57% | Feb 28, 2026 source file |
| Mission Hospital Regional Med Center Mission Viejo, CA · (949) 364-1400 HC ASSAY OF AMMONIA CDM | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| Providence St Joseph Hospital Orange Orange, CA · (714) 633-9111 HC ASSAY OF AMMONIA CDM | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| St Jude Hospital Fullerton, CA · (714) 992-3000 HC ASSAY OF AMMONIA CDM | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| UCI Health - Placentia Linda Orange, CA · (714) 456-7890 AMMONIA | $19.20 | $48.00 | — | 60% | Apr 1, 2026 source file |
| UCI Health - Fountain Valley Orange, CA · (714) 966-7200 AMMONIA | $19.20 | $48.00 | — | 60% | Apr 1, 2026 source file |
| UCI Health - Los Alamitos Orange, CA · (562) 799-3220 AMMONIA | $19.20 | $48.00 | — | 60% | Apr 1, 2026 source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC ASSAY OF AMMONIA LAB | $41.65 | $119.00 | — | 65% | Apr 1, 2026 source file |
| Glendale Memorial Hospital & Health Center Glendale, CA · (818) 502-1900 AMMONIA | $51.19 | $157.00 | $14.57–$157.00 | 67% | Feb 28, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC ASSAY OF AMMONIA LAB | $52.50 | $150.00 | — | 65% | Apr 1, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC ASSAY OF AMMONIA LAB | $54.95 | $157.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC ASSAY OF AMMONIA LAB | $56.70 | $162.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC ASSAY OF AMMONIA LAB | $56.70 | $162.00 | — | 65% | Apr 1, 2026 source file |
| Mission Hospital Regional Med Center Mission Viejo, CA · (949) 364-1400 HC ASSAY OF AMMONIA LAB | $59.04 | $123.00 | — | 52% | Apr 1, 2026 source file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CA · (949) 764-4624 HC Assay of Ammonia # | $66.92 | $102.95 | — | 35% | Apr 1, 2026 source file |
| Keck Hospital of USC Los Angeles, CA · (323) 442-8656 Assay Of Ammonia | $77.50 | $77.50 | — | — | Apr 1, 2026 source file |
| Orange County Global Medical Center Santa Ana, CA · (714) 953-3500 AMMONIA | $80.00 | $80.00 | $11.66–$80.00 | — | Jun 15, 2026 source file |
| Chapman Global Medical Center Orange, CA · (714) 633-0011 AMMONIA | $80.00 | $80.00 | $12.97–$80.00 | — | May 6, 2026 source file |
| Anaheim Global Medical Center Anaheim, CA · (714) 533-6220 AMMONIA | $80.00 | $80.00 | $12.95–$80.00 | — | Jun 15, 2026 source file |
| Providence St Joseph Hospital Orange Orange, CA · (714) 633-9111 HC ASSAY OF AMMONIA LAB | $85.44 | $178.00 | — | 52% | Apr 1, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC ASSAY OF AMMONIA LAB | $98.70 | $282.00 | — | 65% | Apr 1, 2026 source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC ASSAY OF AMMONIA LAB | $112.70 | $322.00 | — | 65% | Apr 1, 2026 source file |
| St Jude Hospital Fullerton, CA · (714) 992-3000 HC ASSAY OF AMMONIA LAB | $116.64 | $243.00 | — | 52% | Apr 1, 2026 source file |
| Pacifica Hospital of the Valley Sun Valley, CA · (818) 767-3310 Ammonia,blood -Lab | $155.00 | $155.00 | $12.00–$155.00 | — | — source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC ASSAY OF AMMONIA LAB | $161.00 | $460.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC ASSAY OF AMMONIA LAB | $161.00 | $460.00 | — | 65% | Apr 1, 2026 source file |
| USC Kenneth Norris Jr Cancer Hospital Los Angeles, CA Assay Of Ammonia | $178.50 | $178.50 | — | — | Apr 1, 2026 source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC ASSAY OF AMMONIA LAB | $178.85 | $511.00 | — | 65% | Apr 1, 2026 source file |
| California Hospital Medical Center LA Los Angeles, CA · (213) 748-2411 AMMONIA | $179.94 | $371.00 | $14.57–$293.09 | 51% | Feb 28, 2026 source file |
| Kaiser Foundation Hospital - Downey Downey, CA · (562) 461-6007 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - Los Angeles Los Angeles, CA · (323) 783-4011 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA · (818) 719-3800 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Fnd Hospital - Irvine Irvine, CA · (714) 279-4000 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - Panorama City Panorama City, CA · (818) 375-2000 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Anaheim Anaheim, CA · (714) 279-4000 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - West LA Los Angeles, CA · (213) 857-2201 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - South Bay Harbor City, CA · (310) 325-5111 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Kaiser Foundation Hospital - Baldwin Park Baldwin Park, CA · (626) 851-1011 ASSAY OF AMMONIA | $180.96 | $348.00 | $10.00–$30.00 | 48% | — source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC ASSAY OF AMMONIA LAB | $188.30 | $538.00 | — | 65% | Apr 1, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC ASSAY OF AMMONIA LAB | $203.70 | $582.00 | — | 65% | Apr 1, 2026 source file |
| Childrens Hospital at Mission - Cerner Mission Viejo, CA · (949) 365-2408 AMMONIA | $227.00 | $227.00 | $12.95–$227.00 | — | Mar 18, 2026 source file |
| UCI Health - Lakewood Orange, CA · (562) 602-6751 AMMONIA | $242.40 | $606.00 | — | 60% | Apr 1, 2026 source file |
| Foothill Regional Medical Center Tustin, CA · (714) 619-7700 AMMONIA (Chem) | $248.66 | $248.66 | $0.47–$213.85 | — | Mar 18, 2026 source file |
| Los Angeles Community Hospital Los Angeles, CA · (323) 267-0477 AMMONIA (Chem) | $267.08 | $267.08 | $0.76–$229.69 | — | Mar 18, 2026 source file |
| Southern California Hospital at Van Nuys D/P Aph Van Nuys, CA · (323) 462-2271 AMMONIA (Chem) | $270.54 | $270.54 | $12.95–$232.66 | — | Mar 18, 2026 source file |
| Southern California Hospital at Hollywood Hollywood, CA · (323) 462-2271 AMMONIA (Chem) | $270.54 | $270.54 | $0.47–$232.66 | — | Mar 18, 2026 source file |
| Catalina Island Medical Center Avalon, CA · (310) 510-0700 Ammonia level | $351.92 | $502.74 | $13.84–$502.74 | 30% | Jul 20, 2026 source file |
| East Los Angeles Doctors Hospital Los Angeles, CA · (323) 268-5514 ASSAY OF AMMONIA | $372.75 | $372.75 | $6.12–$298.20 | — | Feb 4, 2026 source file |
| Memorial Hospital of Gardena Gardena, CA · (310) 532-4200 ASSAY OF AMMONIA | $372.75 | $372.75 | $6.12–$298.20 | — | Feb 4, 2026 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 HB MISC LAB SPECIAL TEST | $394.18 | $606.43 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 AMMONIA | $394.18 | $606.43 | $35.77–$202.72 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 AMMONIA; BLOOD | $394.18 | $606.43 | $35.77–$202.72 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 HB LAB AMMONIA BL ER | $394.18 | $606.43 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 Laboratory Services | $394.18 | $606.43 | $35.77–$202.72 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 HB LAB AMMONIA BL ER | $450.98 | $693.81 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Clinical and Anatomical Laboratory Services | $450.98 | $693.81 | $35.81–$112.96 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Outpatient Global Laboratory, Radiology and Diagnostic Services | $450.98 | $693.81 | $35.81–$112.96 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Laboratory Services | $450.98 | $693.81 | $35.81–$112.96 | 35% | Nov 26, 2025 source file |
Outpatient: lowest $14.00, median $80.00, highest $450.98 — a 32.2× difference within the same market.
As an inpatient, the same code is billed by 39 facilities here, median $180.96. 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 12 of 32 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 7 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.
4 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 82140 ($91.63). 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.
| Childrens Hospital at Mission - Cerner Mission Viejo, CAHC MAGNESIUM QUANT URINE | $5.00 | file |
| Coast Plaza Doctors Hospital Norwalk, CAASSAY OF AMMONIA | $6.09 | file |
| Community Hospital of Huntington Park Huntington Park, CAASSAY OF AMMONIA | $6.09 | file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CAHC Assay of Ammonia - Hfpa | $8.66 | file |