Lab tests CPT 84439 Wisconsin Outpatient

Free T4 test cost in Wisconsin

In Wisconsin, 81 hospitals publish a cash price for free T4 (free thyroxine) thyroid blood test: from $13.38 to $251.77, with a median of $70.85. The lowest price is at Allina Health Systems (River Falls). The highest price is 18.8× the lowest.

Outpatient cash prices, one line per hospital — its lowest listed price for code 84439. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 24, 2026.

Lowest$13.38Allina Health Systems

Median$70.85half pay less

Highest$251.77in Wisconsin

Lowest saves$57.47vs the median

Hospitals in Wisconsin, cheapest first

Hospital	Cash price	List price	File date
Allina Health Systems lowest River Falls · Minneapolis-St. Paul-Bloomington, MN-WI HCHG T4FREE LCC	$13.38	$23.90	Jun 15, 2026 source file
Bellin Memorial Health Green Bay · Green Bay, WI THYROXINE; FREE (FT4)	$25.93	$56.00	Jun 27, 2026 source file
Ascension NE Wisconsin Oshkosh · Oshkosh-Neenah, WI HC ASSAY OF FREE THYROXINE	$34.20	$60.00	— source file
Ascension NE Wisconsin - St Elizabeth Campus Appleton · Appleton, WI HC ASSAY OF FREE THYROXINE	$34.20	$60.00	— source file
ThedaCare Regional Medical Center-Berlin Berlin · Berlin, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Appleton Appleton · Appleton, WI T4, FREE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Appleton Appleton · Appleton, WI T4, FREE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Appleton Fond Du Lac · Fond du Lac, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Appleton Oshkosh · Oshkosh-Neenah, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Neenah Neenah · Oshkosh-Neenah, WI T4, FREE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-New London New London · New London, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Shawano Shawano · Shawano, WI T4, FREE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Waupaca Waupaca · Waupaca, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
ThedaCare Regional Medical Center-Wild Rose Wild Rose · Wild Rose, WI ASSAY OF FREE THYROXINE	$36.74	$65.60	— source file
Memorial Hospital of Boscobel Boscobel · Platteville, WI THYROXINE; FREE (FT4)	$44.29	$86.00	Jun 27, 2026 source file
Ascension SE Wisconsin Hospital Brookfield · Brookfield, WI HC ASSAY OF FREE THYROXINE	$45.05	$85.00	— source file
Ascension SE Wisconsin Hospital Franklin · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$45.05	$85.00	— source file
Ascension SE Wisconsin Hospital Milwaukee · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$45.05	$85.00	— source file
Ascension St. Francis Hospital Milwaukee · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$45.05	$85.00	— source file
Wheaton Franciscan Healthcare - Southeast Wisconsin Franklin · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$45.05	$85.00	— source file
Gundersen Tri-County Hospital & Clinics Whitehall · Whitehall, WI THYROXINE; FREE (FT4)	$46.92	$74.00	Jun 27, 2026 source file
Gundersen St Josephs Hospital and Clinics Hillsboro · La Crosse-Onalaska, WI-MN THYROXINE; FREE (FT4)	$49.97	$95.00	Jun 27, 2026 source file
Ascension Calumet Hospital Chilton · Appleton, WI HC ASSAY OF FREE THYROXINE	$50.16	$88.00	— source file
Gundersen Moundview Hospital and Clinics Friendship · Friendship, WI THYROXINE; FREE (FT4)	$51.31	$101.00	Jun 27, 2026 source file
St Nicholas Hospital of the Hospital Sisters of the Third Order of St Francis Sheboygan · Sheboygan, WI ASSAY OF FREE THYROXINE	$54.12	$82.00	— source file
St Vincent Hospital of the Hospital Sisters of the Third Order of St Francis Green Bay · Green Bay, WI ASSAY OF FREE THYROXINE	$54.12	$82.00	— source file
St Clare Memorial Hospital Oconto Falls · Green Bay, WI HC T4 FREE DIRECT DIALYSIS	$54.12	$82.00	— source file
St Marys Hospital Medical Center Green Bay · Green Bay, WI ASSAY OF FREE THYROXINE	$54.12	$82.00	— source file
Aspirus Divine Savior Hospital Portage · Madison, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Eagle River Hospital Eagle River · Eagle River, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Langlade Hospital Antigo · Antigo, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Medford Hospital Medford · Medford, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Merrill Hospital Merrill · Merrill, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Plover Hospital Stevens Point · Stevens Point-Plover, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Rhinelander Hospital Rhinelander · Rhinelander, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Stanley Hospital Stanley · Eau Claire, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Stevens Point Hospital Stevens Point · Stevens Point-Plover, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Tomahawk Hospital Tomahawk · Tomahawk, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Wausau Hospital Wausau · Wausau, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Aspirus Wisconsin Rapids Hospital Wisconsin Rapids · Wisconsin Rapids-Marshfield, WI Fac Assay of Free Thyroxine	$70.85	$109.00	Apr 1, 2026 source file
Howard Young Medical Center Woodruff · Woodruff, WI ASSAY OF FREE THYROXINE	$70.85	$109.00	Apr 1, 2026 source file
Westfields Hospital New Richmond · Minneapolis-St. Paul-Bloomington, MN-WI Chemistry	$72.06	$137.00	— source file
Children's Hospital of Wisconsin Neenah · Oshkosh-Neenah, WI HBC FV T4 FREE	$73.70	$134.00	Mar 24, 2026 source file
Essentia Health St Marys Hospital-Superior Superior · Duluth, MN-WI THYROXIN, FREE (FREE T4)	$80.55	$109.00	Jan 1, 2026 source file
Marshfield Medical Center - Eau Claire Eau Claire · Eau Claire, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Ladysmith Ladysmith · Ladysmith, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Minocqua Minocqua · Minocqua, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Neillsville Neillsville · Neillsville, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Park Falls Park Falls · Park Falls, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Rice Lake Rice Lake · Rice Lake, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - River Region at Stevens Point Stevens Point · Stevens Point-Plover, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Marshfield Medical Center - Weston Weston · Wausau, WI THYROXINE FREE ASSAY-TECH	$80.75	$85.00	Feb 20, 2026 source file
Columbia St. Mary's Glendale · Milwaukee-Waukesha, WI T-4 FREE	$88.51	$167.00	— source file
Hudson Hospital Hudson · Minneapolis-St. Paul-Bloomington, MN-WI Chemistry	$89.77	$199.00	— source file
Aurora BayCare Medical Center Green Bay · Green Bay, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Lakeland Medical Center Elkhorn · Whitewater-Elkhorn, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Bay Area Marinette · Marinette, WI-MI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Burlington Burlington · Racine-Mount Pleasant, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Fond du Lac Fond Du Lac · Fond du Lac, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Grafton Grafton · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Kenosha Kenosha · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Manitowoc Two Rivers · Manitowoc, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Mount Pleasant Mount Pleasant · Racine-Mount Pleasant, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Oshkosh Oshkosh · Oshkosh-Neenah, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Sheboygan County Sheboygan · Sheboygan, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Summit Summit · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Medical Center Washington County Hartford · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Psychiatric Hospital Wauwatosa · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora Sinai Medical Center of Aurora Health Care Metro Milwaukee · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora St Lukes Medical Center of Aurora Health Care Metro Milwaukee · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora St Lukes South Shore of Aurora Health Care Metro Cudahy · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Aurora West Allis Medical Center West Allis · Milwaukee-Waukesha, WI T4, FREE	$90.00	$180.00	Nov 21, 2025 source file
Columbia St. Mary's Hospital Milwaukee Milwaukee · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$91.69	$173.00	— source file
Columbia St. Mary's Hospital Ozaukee Mequon · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$91.69	$173.00	— source file
Sacred Heart Rehabilitation Institute Mequon · Milwaukee-Waukesha, WI HC ASSAY OF FREE THYROXINE	$91.69	$173.00	— source file
Children's Hospital of Wisconsin Milwaukee · Milwaukee-Waukesha, WI HBC FREE T4	$101.34	$184.25	Mar 23, 2026 source file
UnityPoint Health - Meriter Madison · Madison, WI ASSAY OF FREE THYROXINE	$112.80	$141.00	Jan 28, 2026 source file
Amery Hospital East Amery · East Amery, WI Chemistry	$114.71	$220.00	— source file
Marshfield Medical Center - Beaver Dam Beaver Dam · Beaver Dam, WI THYROXINE FREE ASSAY-TECH	$140.60	$148.00	Feb 20, 2026 source file
Marshfield Medical Center - Marshfield Marshfield · Wisconsin Rapids-Marshfield, WI THYROXINE FREE ASSAY-TECH	$147.25	$155.00	Feb 20, 2026 source file
AdventHealth Durand Durand · Durand, WI HC T4 FREE - THYROXINE FREE	$251.77	$251.77	Apr 1, 2026 source file

By metro area

Each metro page compares every listing, including prices for both sides of the body.

Metro area	Hospitals	Lowest	Median
Milwaukee-Waukesha, WI	18	$45.05	$90.00
Green Bay, WI	5	$25.93	$54.12
Oshkosh-Neenah, WI	5	$34.20	$36.74
Appleton, WI	4	$34.20	$36.74
Minneapolis-St. Paul-Bloomington, MN-WI	3	$13.38	$72.06
Stevens Point-Plover, WI	3	$70.85	$70.85
Eau Claire, WI	2	$70.85	$75.80
Fond du Lac, WI	2	$36.74	$63.37
Madison, WI	2	$70.85	$91.82
Racine-Mount Pleasant, WI	2	$90.00	$90.00
Sheboygan, WI	2	$54.12	$72.06
Wausau, WI	2	$70.85	$75.80
Wisconsin Rapids-Marshfield, WI	2	$70.85	$109.05
Antigo, WI	1	$70.85	$70.85
Berlin, WI	1	$36.74	$36.74
Brookfield, WI	1	$45.05	$45.05
Beaver Dam, WI	1	$140.60	$140.60
Durand, WI	1	$251.77	$251.77
Duluth, MN-WI	1	$80.55	$80.55
Eagle River, WI	1	$70.85	$70.85
East Amery, WI	1	$114.71	$114.71
Friendship, WI	1	$51.31	$51.31
Ladysmith, WI	1	$80.75	$80.75
La Crosse-Onalaska, WI-MN	1	$49.97	$49.97
Medford, WI	1	$70.85	$70.85
Merrill, WI	1	$70.85	$70.85
Minocqua, WI	1	$80.75	$80.75
Manitowoc, WI	1	$90.00	$90.00
Marinette, WI-MI	1	$90.00	$90.00
Neillsville, WI	1	$80.75	$80.75
New London, WI	1	$36.74	$36.74
Park Falls, WI	1	$80.75	$80.75
Platteville, WI	1	$44.29	$44.29
Rhinelander, WI	1	$70.85	$70.85
Rice Lake, WI	1	$80.75	$80.75
Shawano, WI	1	$36.74	$36.74
Tomahawk, WI	1	$70.85	$70.85
Waupaca, WI	1	$36.74	$36.74
Whitehall, WI	1	$46.92	$46.92
Wild Rose, WI	1	$36.74	$36.74
Woodruff, WI	1	$70.85	$70.85
Whitewater-Elkhorn, WI	1	$90.00	$90.00

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.

Free T4 (free thyroxine) thyroid blood test in other states

Median cash price across the state's hospitals.