Free T3 test cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 51 hospitals list a cash price for Free T3 thyroid hormone test: from $13.43 to $473.00, with a median of $82.50. The lowest listed price is at Roseland Community Hospital Association — $69.07 less than the median here. Across Illinois, the median is $82.50 at 65 hospitals.
Cash prices at 51 facilities across 37 cities for code 84481, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 17, 2025 and Sep 1, 2026.
Lowest$13.43Roseland Community Hospital Association
Median$82.50half pay less
Highest$473.00in this market
Difference35.2×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 Chicago-Naperville-Elgin, IL-IN.
median
Lowest $13.43Highest $473.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Roseland Community Hospital Association lowest Chicago, IL Thyroid hormone, T3 measurement, free | $13.43 | $42.35 | $13.43–$46.59 | 68% | Jul 1, 2026 source file |
| Uchicago Medicine Adventhealth Bolingbrook Bolingbrook, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Glenoaks Glendale Heights, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth La Grange La Grange, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Hinsdale Hinsdale, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Hinsdale Hinsdale, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth La Grange La Grange, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Hinsdale Hinsdale, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Hinsdale Hinsdale, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth La Grange La Grange, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Bolingbrook Bolingbrook, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Bolingbrook Bolingbrook, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Bolingbrook Bolingbrook, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Glenoaks Glendale Heights, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Glenoaks Glendale Heights, IL HC T3 FREE | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth Glenoaks Glendale Heights, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine Adventhealth La Grange La Grange, IL HC T3, FREE - ARUP | $14.75 | $59.00 | — | 75% | Apr 1, 2026 source file |
| Saint Francis Hospital Evanston, IL HC TRIIODOTHYRONINE FREE ASSAY (FT-3) | $16.00 | $99.00 | $10.16–$99.00 | 84% | Sep 1, 2026 source file |
| Mercy Medical Center Aurora, IL T3(TRI-IODOTHYRONINE), FREE | $16.00 | $454.00 | $10.16–$454.00 | 96% | Sep 1, 2026 source file |
| Northern Illinois Medical Center DBA Northwestern Medicine McHenry Hospital McHenry, IL HB Ref Free T3 by Dialysis | $27.30 | $39.00 | $7.53–$39.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL HB Ref Free T3 by Dialysis | $27.30 | $39.00 | $6.47–$39.00 | 30% | Apr 1, 2026 source file |
| Presence Chicago Hospitals Network Chicago, IL HC T3, FREE TRIIODOTHYRONINE, SERUM | $32.67 | $99.00 | $16.94–$70.83 | 67% | — source file |
| Presence Chicago Hospitals Network Chicago, IL HC T3, FREE TRIIODOTHYRONINE, SERUM | $32.67 | $99.00 | $16.94–$70.83 | 67% | — source file |
| Community First Healthcare of Illinois INC Chicago, IL Thyroid hormone, T3 measurement, free | $39.75 | $79.50 | $13.05–$79.50 | 50% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB T3 Free | $51.10 | $73.00 | $30.66–$73.00 | 30% | Apr 1, 2026 source file |
| Gottlieb Memorial Hospital Melrose Park, IL Triiodothyronine T3 Free | $51.87 | $273.00 | $116.30–$228.77 | 81% | Mar 31, 2026 source file |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL R T3 Free by Dialysis Lc-Ms | $52.00 | $80.00 | $10.80–$43.68 | 35% | — source file |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL R T3 Free by Dialysis Lc-Ms | $52.00 | $80.00 | $10.80–$43.68 | 35% | — source file |
| NorthShore University HealthSystems Highland Park Hospital Highland Park, IL R T3 Free by Dialysis Lc-Ms | $52.00 | $80.00 | $10.80–$43.68 | 35% | — source file |
| NorthShore University HealthSystems Evanston Hospital Evanson, IL R T3 Free by Dialysis Lc-Ms | $52.00 | $80.00 | $10.80–$43.68 | 35% | — source file |
| Loyola University Medical Center Maywood, IL Triiodothyronine T3 Free | $62.79 | $273.00 | $119.85–$287.74 | 77% | Mar 31, 2026 source file |
| La Rabida Children's Hospital|LaRabida Childrens Hospital Chicago, IL FREE T3 | $73.63 | $73.63 | — | — | Apr 1, 2026 source file |
| Swedish Covenant Health Chicago, IL HB R T3 FREE BY DIALYSIS LC-MS | $80.00 | $80.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Clinical Operations Evanston, IL HB R T3 FREE BY DIALYSIS LC-MS | $80.00 | $80.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Clinical Operations Highland Park, IL HB R T3 FREE BY DIALYSIS LC-MS | $80.00 | $80.00 | — | — | Apr 1, 2026 source file |
| Advocate South Suburban Hospital Hazel Crest, IL T3, FREE | $82.50 | $165.00 | $16.94–$160.71 | 50% | Nov 4, 2025 source file |
| Advocate Christ Medical Center Oak Lawn, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Park Ridge Park Ridge, IL T3, FREE | $82.50 | $165.00 | $16.94–$146.85 | 50% | Nov 4, 2025 source file |
| Advocate Condell Medical Center Libertyville, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Advocate Good Samaritan Hospital Downers Grove, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Advocate Good Shepherd Hospital Barrington, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Advocate Illinois Masonic Medical Center Chicago, IL T3, FREE | $82.50 | $165.00 | $16.94–$134.31 | 50% | Nov 4, 2025 source file |
| Advocate Lutheran General Hospital Park Ridge, IL T3, FREE | $82.50 | $165.00 | $16.94–$146.85 | 50% | Nov 4, 2025 source file |
| Advocate Sherman Hospital Elgin, IL T3, FREE | $82.50 | $165.00 | $16.94–$148.50 | 50% | Nov 4, 2025 source file |
| Advocate Trinity Hospital Chicago, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Oak Lawn Oak Lawn, IL T3, FREE | $82.50 | $165.00 | $16.94–$132.00 | 50% | Nov 4, 2025 source file |
| Humboldt Park Health North Francisco Chicago, IL Thyroid hormone, T3 measurement, free | $94.67 | $338.10 | $338.10 | 72% | Aug 24, 2026 source file |
| Palos Community Hospital Palos Heights, IL HB Ref Free T3 by Dialysis | $107.10 | $153.00 | $24.48–$153.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $34.01–$179.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital Dekalb, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $32.76–$179.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $29.71–$179.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $28.64–$179.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $12.35–$179.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $26.67–$179.00 | 30% | Apr 1, 2026 source file |
| Northern Illinois Medical Center DBA Northwestern Medicine McHenry Hospital McHenry, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $34.55–$179.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Triiodothyronine, Total and Free, T3 by Dialysis | $125.30 | $179.00 | $75.18–$179.00 | 30% | Apr 1, 2026 source file |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Free T3* | $130.00 | $200.00 | $27.00–$109.20 | 35% | — source file |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Free T3* | $130.00 | $200.00 | $27.00–$109.20 | 35% | — source file |
| NorthShore University HealthSystems Evanston Hospital Evanson, IL Free T3* | $130.00 | $200.00 | $27.00–$109.20 | 35% | — source file |
| NorthShore University HealthSystems Highland Park Hospital Highland Park, IL Free T3* | $130.00 | $200.00 | $27.00–$109.20 | 35% | — source file |
| Northwestern Medicine Delnor Hospital Geneva, IL HB Ref Free T3 by Dialysis | $132.30 | $189.00 | $28.16–$189.00 | 30% | Apr 1, 2026 source file |
| Shriners Childrens - Chicago Chicago, IL FREE ASSAY (FT-3) | $134.90 | $134.90 | $13.00–$29.11 | — | — source file |
| Resilience Healthcare Weiss Memorial Hospital LLC Chicago, IL T3 Free Dialysis LC/MS-MS SO | $138.00 | $405.88 | $13.60–$263.82 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare Weiss Memorial Hospital LLC Chicago, IL Triiodothyronine (T3), Free SO | $138.00 | $405.88 | $13.60–$263.82 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare Weiss Memorial Hospital LLC Chicago, IL .T4F+T3Free SO | $138.00 | $405.88 | $13.60–$263.82 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare Weiss Memorial Hospital LLC Chicago, IL T3 Free | $138.00 | $405.88 | $13.60–$263.82 | 66% | Mar 17, 2025 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL HB T3 Free | $148.40 | $212.00 | $31.59–$212.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL HB T3 Free | $159.60 | $228.00 | $36.48–$228.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital Dekalb, IL HB T3 Free | $168.70 | $241.00 | $44.10–$241.00 | 30% | Apr 1, 2026 source file |
| Northwest Community Hospital Arlington Heights, IL Hb Free Assay (Ft-3) | $189.00 | $189.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Clinical Operations Highland Park, IL HB FREE T3* | $200.00 | $200.00 | — | — | Apr 1, 2026 source file |
| Swedish Covenant Health Chicago, IL HB FREE T3* | $200.00 | $200.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Clinical Operations Evanston, IL HB FREE T3* | $200.00 | $200.00 | — | — | Apr 1, 2026 source file |
| Elmhurst Memorial Hospital Elmhurst, IL HC TRIIODOTHYRONINE T3 FREE | $203.00 | $203.00 | — | — | Apr 1, 2026 source file |
| Edward Hospital Naperville, IL HC TRIIODOTHYRONINE T3 FREE | $203.00 | $203.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL HB T3 Free | $219.10 | $313.00 | $59.47–$313.00 | 30% | Apr 1, 2026 source file |
| Resilience Healthcare West Suburban Medical Center LLC Oak Park, IL T3 Free | $220.54 | $648.65 | $13.60–$421.62 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center LLC Oak Park, IL Triiodothyronine (T3), Free SO | $220.54 | $648.65 | $13.60–$421.62 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center LLC Oak Park, IL T3 Free Dialysis LC/MS-MS SO | $220.54 | $648.65 | $13.60–$421.62 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center LLC Oak Park, IL .T4F+T3Free SO | $220.54 | $648.65 | $13.60–$421.62 | 66% | Mar 17, 2025 source file |
| Uchicago Medicine Northwest Indiana Crown Point, IN HC TRIIODOTHYRONINE T3; FREE | $245.00 | $245.00 | — | — | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL Hc Triiodothyronine T3; Free | $245.00 | $245.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL HB T3 Free | $247.10 | $353.00 | $24.36–$353.00 | 30% | Apr 1, 2026 source file |
| Northern Illinois Medical Center DBA Northwestern Medicine McHenry Hospital McHenry, IL HB T3 Free | $271.60 | $388.00 | $74.88–$388.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL HB T3 Free | $271.60 | $388.00 | $64.41–$388.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL HB Ref Free T3 by Dialysis | $274.40 | $392.00 | $27.05–$392.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL HB Ref T3 Free | $274.40 | $392.00 | $27.05–$392.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL HB Ref T3 Free | $274.40 | $392.00 | $58.41–$392.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL HB Ref Free T3 by Dialysis | $307.30 | $439.00 | $83.41–$439.00 | 30% | Apr 1, 2026 source file |
| Ann & Robert H. Lurie Children's Hospital of Chicago Chicago, IL H FREE T3 (TRIIODOTHYRONINE) | $367.50 | $525.00 | $84.00–$8,500.00 | 30% | — source file |
| The Methodist Hospitals, Inc. Gary, IN Free T3 | $404.60 | $578.00 | $16.94–$514.42 | 30% | — source file |
| The Methodist Hospitals, Inc. Merrillville, IN Free T3 | $404.60 | $578.00 | $16.94–$514.42 | 30% | — source file |
| The University of Chicago Medical Center Chicago, IL Hc Triiodothyronine T3; Free | $473.00 | $473.00 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $13.43, median $82.50, highest $473.00 — a 35.2× difference within the same market.
As an inpatient, the same code is billed by 33 facilities here, median $82.50. 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 32 of 37 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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
Free T3 is the active thyroid hormone not bound to proteins. It is usually checked after TSH (84443) and free T4 (84439), mainly when an overactive thyroid is suspected.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.
2 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84481 ($85.20). 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.
| Gottlieb Memorial Hospital Melrose Park, ILEwc - Lab Free T3 | $0.01 | file |
| Loyola University Medical Center Maywood, ILEwc - Lab Free T3 | $0.01 | file |