Free T4 test cost in Charlotte, NC
In Charlotte-Concord-Gastonia, NC-SC, 16 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $98.00 to $407.00, with a median of $150.93. The lowest listed price is at Gaston Memorial Hospital and 2 other hospitals — $52.93 less than the median here. Across North Carolina, the median is $78.40 at 37 hospitals.
Cash prices at 16 facilities across 13 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Dec 1, 2025 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 Charlotte-Concord-Gastonia, NC-SC.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Gaston Memorial Hospital lowest Belmont, NC CHG T4 THYROXINE FREE | $98.00 | $98.00 | $5.21–$93.10 | — | May 11, 2026 source file |
| Gaston Memorial Hospital lowest Mount Holly, NC CHG T4 THYROXINE FREE | $98.00 | $98.00 | $5.21–$93.10 | — | May 11, 2026 source file |
| Gaston Memorial Hospital lowest Gastonia, NC CHG T4 THYROXINE FREE | $98.00 | $98.00 | $5.21–$93.10 | — | May 11, 2026 source file |
| Duke Health Lake Norman Hospital Mooresville, NC · (704) 660-4000 T4 Free | $98.82 | $366.00 | $18.82–$128.10 | 73% | — source file |
| Duke Health Lake Norman Hospital Mooresville, NC · (704) 660-4000 HC T4 FREE | $98.82 | $366.00 | $32.13–$237.90 | 73% | — source file |
| Duke Health Lake Norman Hospital Mooresville, NC · (704) 660-4000 T4 Free | $98.82 | $366.00 | $18.82–$126.27 | 73% | — source file |
| MUSC Chester Regional Medical Center Chester, SC · (803) 581-3151 HB THYROXINE FREE RIA ASSAY | $124.00 | $248.00 | — | 50% | Apr 1, 2026 source file |
| Carolinas Medical Center Charlotte, NC · (704) 355-2000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.11–$271.67 | 50% | Dec 5, 2025 source file |
| Carolinas Rehabilitation Charlotte, NC HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$277.70 | 50% | Dec 5, 2025 source file |
| Carolinas Medical Center Charlotte, NC · (704) 355-2000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.11–$271.67 | 50% | Dec 4, 2025 source file |
| Carolinas Medical Center Charlotte, NC · (704) 355-2000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.11–$277.70 | 50% | Dec 4, 2025 source file |
| Carolinas Medical Center Charlotte, NC · (704) 355-2000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $57.35–$301.85 | 50% | Dec 4, 2025 source file |
| Carolinas Rehabilitation Belmont, NC HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$277.70 | 50% | Dec 5, 2025 source file |
| Atrium Health Anson Wadesboro, NC · (704) 694-5131 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$286.76 | 50% | Dec 1, 2025 source file |
| Carolinas Medical Center-Northeast Concord, NC · (704) 783-3000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$286.76 | 50% | Dec 1, 2025 source file |
| Atrium Health Lincoln Lincolnton, NC · (980) 212-2000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$286.76 | 50% | Dec 1, 2025 source file |
| Atrium Health Union Monroe, NC · (704) 283-3100 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$286.76 | 50% | Dec 4, 2025 source file |
| Atrium Health Pineville Charlotte, NC · (704) 379-5000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$277.70 | 50% | Dec 5, 2025 source file |
| Atrium Health Pineville Charlotte, NC · (704) 379-5000 HC ASSAY OF FREE THYROXINE T4 | $150.93 | $301.85 | $9.20–$292.79 | 50% | Dec 5, 2025 source file |
| Amisub of South Carolina Rock Hill, SC THYROXINE FREE | $201.75 | $269.00 | $1.00–$269.00 | 25% | Sep 1, 2026 source file |
| Amisub of South Carolina Fort Mill, SC THYROXINE FREE | $201.75 | $269.00 | $1.00–$269.00 | 25% | Apr 15, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC · (803) 286-1481 HB THYROXINE FREE RIA ASSAY | $407.00 | $814.00 | — | 50% | Apr 1, 2026 source file |
Outpatient: lowest $98.00, median $150.93, highest $407.00 — a 4.2× difference within the same market.
As an inpatient, the same code is billed by 16 facilities here, median $150.93. 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 11 of 14 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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.