Free T4 test cost in New York, NY
In New York-Newark-Jersey City, NY-NJ, 50 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $9.00 to $375.21, with a median of $10.82. The lowest listed price is at Saint Marys Hospital — $1.82 less than the median here. Across New York, the median is $48.47 at 64 hospitals.
Cash prices at 50 facilities across 38 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 25, 2026; the hospital files themselves were last updated between Oct 28, 2025 and Sep 5, 2026.
Lowest$9.00Saint Marys Hospital
Median$10.82half pay less
Highest$375.21in this market
Difference41.7×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 New York-Newark-Jersey City, NY-NJ.
median
Lowest $9.00Highest $429.57
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Saint Marys Hospital lowest Passaic, NJ · (973) 365-4300 Hc Assay Of Free Thyroxine | $9.00 | $172.00 | $5.41–$146.20 | 95% | Sep 1, 2026 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 T4 FREE | $9.02 | $55.00 | $13.81–$55.00 | 84% | Dec 31, 2025 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 CHG ASSAY OF FREE THYROXINE | $9.02 | $23.00 | $6.69–$22.60 | 61% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$158.83 | 76% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$158.83 | 76% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 CHG ASSAY OF FREE THYROXINE | $9.02 | $23.00 | $6.69–$22.60 | 61% | Sep 5, 2026 source file |
| Hmh Hospitals Old Bridge, NJ THYROXINE-FREE. | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ T4 FREE | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ T4 FREE QST | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Old Bridge, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 THYROXINE-FREE. | $9.02 | $162.00 | $40.66–$162.00 | 94% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $13.81–$55.00 | 84% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 THYROXINE FREE FT4 | $9.02 | $55.00 | $13.81–$55.00 | 84% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $13.81–$55.00 | 84% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 T4 FREE QST | $9.02 | $162.00 | $40.66–$162.00 | 94% | Dec 31, 2025 source file |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $40.66–$162.00 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ THYROXINE-FREE. | $9.02 | $162.00 | $22.84–$158.68 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $7.76–$53.87 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ T4 FREE | $9.02 | $55.00 | $7.76–$53.87 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $7.76–$53.87 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $7.76–$53.87 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ T4 FREE QST | $9.02 | $162.00 | $22.84–$158.68 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Red Bank, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $22.84–$158.68 | 94% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 THYROXINE-FREE. | $9.02 | $162.00 | $9.02–$41.33 | 94% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $9.02–$41.33 | 84% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 T4 FREE | $9.02 | $55.00 | $9.02–$41.33 | 84% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 THYROXINE FREE FT4 | $9.02 | $55.00 | $9.02–$41.33 | 84% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $9.02–$41.33 | 84% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 T4 FREE QST | $9.02 | $162.00 | $9.02–$41.33 | 94% | Dec 31, 2025 source file |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $9.02–$41.33 | 94% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 THYROXINE-FREE. | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 T4 FREE | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 THYROXINE FREE FT4 | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $7.32–$53.51 | 84% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 T4 FREE QST | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $21.55–$157.61 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ THYROXINE-FREE. | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ T4 FREE | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ T4 FREE QST | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Neptune City, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 THYROXINE-FREE. | $9.02 | $162.00 | $29.97–$159.34 | 94% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $10.18–$54.10 | 84% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 T4 FREE | $9.02 | $55.00 | $10.18–$54.10 | 84% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 THYROXINE FREE FT4 | $9.02 | $55.00 | $10.18–$54.10 | 84% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $10.18–$54.10 | 84% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 T4 FREE QST | $9.02 | $162.00 | $29.97–$159.34 | 94% | Dec 31, 2025 source file |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $29.97–$159.34 | 94% | Dec 31, 2025 source file |
| New York City Health and Hospitals Broadway Elmhurst, NY HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$111.94 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals Broadway Elmhurst, NY HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$111.94 | 76% | Sep 5, 2026 source file |
| Hmh Hospitals Edison, NJ THYROXINE-FREE. | $9.02 | $162.00 | $26.08–$153.25 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $8.86–$52.03 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE | $9.02 | $55.00 | $8.86–$52.03 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $8.86–$52.03 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $8.86–$52.03 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE QST | $9.02 | $162.00 | $26.08–$153.25 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $26.08–$153.25 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ THYROXINE-FREE. | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE QST | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals Edison, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| New York City Health and Hospitals New York, NY HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$153.99 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals New York, NY HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $1.00–$34.73 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals New York, NY CHG ASSAY OF FREE THYROXINE | $9.02 | $23.00 | $6.69–$22.60 | 61% | Sep 5, 2026 source file |
| New York City Health and Hospitals New York, NY HC THYROXINE; FREE | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals New York, NY HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE-FREE. | $9.02 | $162.00 | $23.00–$157.66 | 94% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $7.81–$53.53 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE | $9.02 | $55.00 | $7.81–$53.53 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE FREE FT4 | $9.02 | $55.00 | $7.81–$53.53 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $7.81–$53.53 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE QST | $9.02 | $162.00 | $23.00–$157.66 | 94% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $23.00–$157.66 | 94% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE-FREE. | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE FREE FT4 | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $10.48–$46.75 | 84% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE QST | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| Ocean Medical Center Brick, NJ · (732) 840-2200 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $30.86–$137.70 | 94% | Dec 31, 2025 source file |
| NYC New York City Health and Hospitals New York, NY HC THYROXINE; FREE | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| NYC New York City Health and Hospitals New York, NY HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $1.00–$34.61 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$168.95 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$168.95 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE | $9.02 | $37.80 | $1.00–$34.73 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $1.00–$34.73 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$105.62 | 76% | Sep 5, 2026 source file |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$105.62 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals Jamaica, NY HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$144.74 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals Jamaica, NY HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$144.74 | 76% | Sep 5, 2026 source file |
| New York City Health and Hospitals Jamaica, NY CHG ASSAY OF FREE THYROXINE | $9.02 | $23.00 | $6.69–$22.60 | 61% | Sep 5, 2026 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 THYROXINE-FREE. | $9.02 | $162.00 | $9.02–$10.82 | 94% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $9.02–$10.82 | 84% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 T4 FREE | $9.02 | $55.00 | $9.02–$10.82 | 84% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 THYROXINE FREE FT4 | $9.02 | $55.00 | $27.28–$53.53 | 84% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $27.28–$53.53 | 84% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 T4 FREE QST | $9.02 | $162.00 | $80.35–$157.66 | 94% | Dec 31, 2025 source file |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $80.35–$157.66 | 94% | Dec 31, 2025 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE | $9.02 | $37.80 | $8.84–$154.24 | 76% | Sep 5, 2026 source file |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC THYROXINE; FREE, ADDITIONAL | $9.02 | $37.80 | $8.84–$154.24 | 76% | Sep 5, 2026 source file |
| University Hospital Newark, NJ · (973) 972-4300 ASSAY OF FREE THYROXINE | $10.37 | $384.95 | $5.99–$365.70 | 97% | Aug 13, 2026 source file |
| Chilton Medical Center Pompton Plains, NJ · (973) 831-5000 Thyroxine Free | $10.37 | $63.00 | — | 84% | — source file |
| Morristown Medical Center Morristown, NJ · (973) 971-5450 Thyroxine Free | $10.37 | $63.00 | — | 84% | — source file |
| CentraState Medical Center Freehold Township, NJ · (732) 294-7012 Thyroxine Free | $10.37 | $190.00 | — | 95% | — source file |
| Overlook Medical Center Summit, NJ · (908) 522-2000 Thyroxine Free | $10.37 | $63.00 | — | 84% | — source file |
| Newton Medical Center Newton, NJ · (973) 383-2121 Thyroxine Free | $10.37 | $63.00 | — | 84% | — source file |
| NYU Langone Brooklyn, NY HC ASSAY OF FREE THYROXINE | $10.82 | $148.90 | $8.12–$202.60 | 93% | Jan 1, 2026 source file |
| NYU Langone New York, NY · (212) 263-7300 HC ASSAY OF FREE THYROXINE | $10.82 | $148.90 | $8.12–$202.60 | 93% | Jan 1, 2026 source file |
| NYU Langone New York, NY · (212) 263-7300 HC ASSAY OF FREE THYROXINE | $10.82 | $148.90 | $8.12–$202.60 | 93% | Jan 1, 2026 source file |
| NYU Langone Mineola, NY HC ASSAY OF FREE THYROXINE | $10.82 | $148.90 | $8.12–$202.60 | 93% | Jan 1, 2026 source file |
| NYU Langone Hospital?Suffolk Patchogue, NY HC ASSAY OF FREE THYROXINE | $10.82 | $148.90 | $8.12–$202.60 | 93% | Jan 1, 2026 source file |
| Jamaica Hospital Medical Center Jamaica, NY · (718) 262-6000 ASSAY OF FREE THYROXINE | $18.00 | $18.00 | $5.50–$1,912.00 | — | — source file |
| Flushing Hospital Medical Center Flushing, NY · (718) 670-5000 ASSAY OF FREE THYROXINE | $18.00 | $18.00 | $5.50–$1,912.00 | — | — source file |
| Flushing Hospital Medical Center Flushing, NY · (718) 670-5000 THYROXINE (THYROID CHEMICAL); FREE | $27.00 | $27.00 | $5.50–$1,912.00 | — | — source file |
| Jamaica Hospital Medical Center Jamaica, NY · (718) 262-6000 THYROXINE (THYROID CHEMICAL); FREE | $27.00 | $27.00 | $5.50–$1,912.00 | — | — source file |
| The Valley Hospital Paramus, NJ · (201) 447-8000 FRT4D | $34.80 | $58.00 | $7.22–$49.30 | 40% | — source file |
| Englewood Health Englewood, NJ · (201) 894-3000 Free T4 84439 | $40.00 | $400.00 | $31.28–$320.00 | 90% | Feb 2, 2026 source file |
| Maimonides Medical Center Brooklyn, NY · (718) 283-6000 THYROXINE FREE | $48.00 | $48.00 | — | — | Apr 1, 2026 source file |
| Hudson Regional Hospital Secaucus, NJ · (201) 392-3200 Thyroxine (thyroid chemical), free | $62.00 | $62.00 | $9.02–$116.99 | — | Jan 19, 2026 source file |
| HMH Carrier Behavioral Health Belle Mead, NJ T4 FREE QST | $64.80 | $162.00 | $23.49–$127.98 | 60% | — source file |
| HMH Carrier Behavioral Health Belle Mead, NJ T4 FREE QST | $64.80 | $162.00 | $23.49–$127.98 | 60% | — source file |
| The Valley Hospital Paramus, NJ · (201) 447-8000 FREE T4 TEST | $79.20 | $132.00 | $7.22–$112.20 | 40% | — source file |
| The Valley Hospital Paramus, NJ · (201) 447-8000 FREE T-4 | $82.20 | $137.00 | $7.22–$116.45 | 40% | — source file |
| Morristown Medical Center Morristown, NJ · (973) 971-5450 Thyroxine Free | $106.52 | $1,844.00 | — | 94% | — source file |
| Mount Sinai Behavioral Health Center New York, NY HC Thyroxine (T4) Free | $108.00 | $120.00 | — | 10% | Apr 1, 2026 source file |
| The Mount Sinai Hospital New York, NY · (212) 241-7981 HC Thyroxine (T4) Free | $108.00 | $120.00 | — | 10% | Apr 1, 2026 source file |
| Mount Sinai Morningside New York, NY HC Thyroxine (T4) Free | $108.00 | $120.00 | — | 10% | Apr 1, 2026 source file |
| Mount Sinai Brooklyn Brooklyn, NY HC Thyroxine (T4) Free | $108.00 | $120.00 | — | 10% | Apr 1, 2026 source file |
| Mount Sinai Queens Long Island, NY HC Thyroxine (T4) Free | $108.00 | $120.00 | — | 10% | Apr 1, 2026 source file |
| Nassau University Medical Center East Meadow, NY · (516) 572-0123 T4 Freedirect Dialysis | $108.18 | $154.53 | $3.69–$625.00 | 30% | Oct 28, 2025 source file |
| Nassau University Medical Center East Meadow, NY · (516) 572-0123 Chem Se Free Thyrox | $108.18 | $154.53 | $3.69–$625.00 | 30% | Oct 28, 2025 source file |
| Overlook Medical Center Summit, NJ · (908) 522-2000 Thyroxine Free | $133.41 | $1,895.00 | — | 93% | — source file |
| CentraState Medical Center Freehold Township, NJ · (732) 294-7012 Thyroxine Free | $134.11 | $846.00 | — | 84% | — source file |
| CentraState Medical Center Freehold Township, NJ · (732) 294-7012 Thyroxine Free | $140.83 | $1,313.00 | — | 89% | — source file |
| Stony Brook Southampton Hospital Southampton, NY ASSAY OF FREE THYROXINE | $154.65 | $154.65 | $9.02–$11.73 | — | — source file |
| Chilton Medical Center Pompton Plains, NJ · (973) 831-5000 Thyroxine Free | $155.02 | $1,883.00 | — | 92% | — source file |
| Newton Medical Center Newton, NJ · (973) 383-2121 Thyroxine Free | $156.08 | $2,963.00 | — | 95% | — source file |
| Memorial Hospital for Cancer and Allied Diseases Middletown, NJ HC T4 (Thyroxine), Free by Dialysis, Serum | $163.00 | $163.00 | $36.08–$146.70 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Floor Hauppauge, NY HC T4 (Thyroxine), Free by Dialysis, Serum | $163.00 | $163.00 | $31.96–$146.70 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Brooklyn, NY HC T4 (Thyroxine), Free by Dialysis, Serum | $163.00 | $163.00 | $31.96–$146.70 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Montvale, NJ HC T4 (Thyroxine), Free by Dialysis, Serum | $163.00 | $163.00 | $36.08–$146.70 | — | Dec 1, 2025 source file |
| St Johns Episcopal Hospital Far Rockaway, NY · (718) 869-7000 ASSAY OF FREE THYROXINE | $166.95 | $166.95 | $8.57–$20.72 | — | — source file |
| The Valley Hospital Paramus, NJ · (201) 447-8000 FT4 BY DIALYSIS | $211.80 | $353.00 | $7.22–$300.05 | 40% | — source file |
| St Johns Riverside Hospital Park Care Pavillion Yonkers, NY ASSAY OF FREE THYROXINE | $236.30 | $278.00 | $8.57–$3,783.00 | 15% | — source file |
| New York Eye and Ear Infirmary of Mount Sinai New York, NY · (212) 979-4000 THYROXINE, FREE | $273.24 | $303.60 | — | 10% | Apr 1, 2026 source file |
| Stony Brook University Hospital Stony Brook, NY · (631) 444-4000 THYROXINE (THYROID CHEMICAL); FREE | $281.00 | $281.00 | $9.02–$4,255.00 | — | — source file |
| Stony Brook University Hospital Stony Brook, NY · (631) 444-4000 ASSAY OF FREE THYROXINE | $301.00 | $301.00 | $9.02–$4,255.00 | — | — source file |
| Memorial Hospital for Cancer and Allied Diseases Middletown, NJ HC Assay of Free Thyroxine - T4 Free | $311.00 | $311.00 | $28.81–$279.90 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Montvale, NJ HC Assay of Free Thyroxine - T4 Free | $311.00 | $311.00 | $28.81–$279.90 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Floor Hauppauge, NY HC Assay of Free Thyroxine - T4 Free | $311.00 | $311.00 | $31.96–$279.90 | — | Dec 1, 2025 source file |
| Memorial Hospital for Cancer and Allied Diseases Brooklyn, NY HC Assay of Free Thyroxine - T4 Free | $311.00 | $311.00 | $31.96–$279.90 | — | Dec 1, 2025 source file |
| Stony Brook Southampton Hospital Southampton, NY THYROXINE (THYROID CHEMICAL); FREE | $339.17 | $339.17 | $9.02–$11.73 | — | — source file |
| Brooklyn Hospital Center at Downtown Campus Brooklyn, NY · (718) 250-8000 THYROXINE (THYROID CHEMICAL); FREE | $375.21 | $375.21 | $7.22–$18.04 | — | — source file |
| Brooklyn Hospital Center at Downtown Campus Brooklyn, NY · (718) 250-8000 ASSAY OF FREE THYROXINE | $429.57 | $429.57 | $7.22–$18.04 | — | — source file |
Outpatient: lowest $9.00, median $10.82, highest $375.21 — a 41.7× difference within the same market.
As an inpatient, the same code is billed by 23 facilities here, median $34.80. 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 31 of 38 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 8 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
A free T4 test measures thyroxine that is not bound to proteins, the active form of the main thyroid hormone. It is usually ordered with or after a TSH test to check for an underactive or overactive thyroid and to adjust thyroid medicine.
What the price covers
The price usually covers the free T4 test only. The blood draw and the TSH test (84443) are billed separately.