Free T4 test cost in New York, NY — inpatient
In New York-Newark-Jersey City, NY-NJ, 23 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $9.02 to $273.24, with a median of $34.80. The lowest listed price is at Hmh Hospitals — $25.78 less than the median here. Across New York, the median is $48.47 at 64 hospitals.
Cash prices at 23 facilities across 17 cities for code 84439, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Oct 28, 2025 and Aug 13, 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 New York-Newark-Jersey City, NY-NJ.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Hmh Hospitals lowest Neptune City, NJ THYROXINE FREE T4 ARUP | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ T4(THYROXINE) FREE BY DIALYSIS | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ THYROXINE FREE FT4 | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ THYROXINE-FREE. | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ T4 FREE | $9.02 | $55.00 | $9.13–$55.00 | 84% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ T4 FREE DIRECT DIALYSIS QST | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Hmh Hospitals lowest Neptune City, NJ T4 FREE QST | $9.02 | $162.00 | $26.89–$162.00 | 94% | Dec 31, 2025 source file |
| Chilton Medical Center Pompton Plains, NJ · (973) 831-5000 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 |
| Overlook Medical Center Summit, NJ · (908) 522-2000 Thyroxine Free | $10.37 | $63.00 | — | 84% | — 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 |
| 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 |
| 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 |
| 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 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 |
| 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 |
| HMH Carrier Behavioral Health Belle Mead, NJ T4 FREE QST | $64.80 | $162.00 | — | 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 |
| 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 Behavioral Health Center New York, 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 |
| The Mount Sinai Hospital New York, NY · (212) 241-7981 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 | — | 30% | Oct 28, 2025 source file |
| Nassau University Medical Center East Meadow, NY · (516) 572-0123 Chem Se Free Thyrox | $108.18 | $154.53 | — | 30% | Oct 28, 2025 source file |
| Helen Hayes Hospital West Haverstraw, NY · (845) 786-4000 THYROXINE, FREE | $117.00 | $117.00 | $8.57–$13.53 | — | — source file |
| The Valley Hospital Paramus, NJ · (201) 447-8000 FT4 BY DIALYSIS | $211.80 | $353.00 | $7.22–$300.05 | 40% | — 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 |
Inpatient: lowest $9.02, median $34.80, highest $273.24 — a 30.3× difference within the same market.
As an outpatient, the same code is billed by 50 facilities here, median $10.82 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 8 of 9 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
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.