Free T3 test cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 62 hospitals list a cash price for free T3 thyroid hormone test: from $13.43 to $473.00, with a median of $85.00. The lowest listed price is at Roseland Community Hospital — $71.57 less than the median here. Across Illinois, the median is $121.50 at 113 hospitals.
- The median here, $85.00, is 12% below the US median of $96.25.
- That is 5.0× Medicare's 2026 national rate for the same service ($16.94).
- 12 of 62 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 62 facilities across 44 cities for code 84481, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 9, 2026; the hospital files themselves were last updated between Jan 1, 2025 and Nov 6, 2026.
Lowest$13.43Roseland Community Hospital
Median$85.00half of hospitals charge 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 |
|---|---|---|---|---|
| Roseland Community Hospital lowest Chicago, IL · (773) 995-3000 Thyroid hormone, T3 measurement, free File of Jul 1, 2026 · source file | $13.43 | $42.35 | $13.43–$46.59 | 68% |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC T3 FREE+1 more line at this price File of Apr 1, 2026 · source file | $14.75 | $59.00 | — | 75% |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC T3, FREE - ARUP+1 more line at this price File of Apr 1, 2026 · source file | $14.75 | $59.00 | — | 75% |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC T3, FREE - ARUP+1 more line at this price File of Apr 1, 2026 · source file | $14.75 | $59.00 | — | 75% |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC T3 FREE+1 more line at this price File of Apr 1, 2026 · source file | $14.75 | $59.00 | — | 75% |
| Saint Francis Hospital Evanston, IL · (847) 316-4000 HC TRIIODOTHYRONINE FREE ASSAY (FT-3) File of Sep 1, 2026 · source file | $16.00 | $99.00 | $10.16–$99.00 | 84% |
| Mercy Medical Center Aurora, IL · (630) 859-2222 T3(TRI-IODOTHYRONINE), FREE File of Sep 1, 2026 · source file | $16.00 | $454.00 | $10.16–$454.00 | 96% |
| Saint Joseph Medical Center - Joliet Joliet, IL · (815) 725-7133 T3(TRI-IODOTHYRONINE), FREE File of Sep 1, 2026 · source file | $16.00 | $589.00 | $9.28–$589.00 | 97% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Free T3 by Dialysis File of Apr 1, 2026 · source file | $27.30 | $39.00 | $7.53–$39.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Free T3 by Dialysis File of Apr 1, 2026 · source file | $27.30 | $39.00 | $6.47–$39.00 | 30% |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 TRIIODOTHYRONINE (T-3) FREE File of Apr 1, 2026 · source file | $30.10 | $43.00 | $3.18–$34.40 | 30% |
| Franciscan Health Munster Munster, IN · (219) 922-4200 T3; Free File of Jan 1, 2026 · source file | $32.59 | $153.00 | $13.38–$114.75 | 79% |
| Presence Saint Joseph Hospital - Chicago Chicago, IL · (773) 665-3000 HC T3, FREE TRIIODOTHYRONINE, SERUM+1 more line at this price File of Jan 1, 2026 · source file | $32.67 | $99.00 | $16.94–$70.83 | 67% |
| Community First Medical Center Chicago, IL · (773) 282-7000 Thyroid hormone, T3 measurement, free File of Apr 1, 2026 · source file | $39.75 | $79.50 | $13.05–$79.50 | 50% |
| Gottlieb Memorial Hospital Melrose Park, IL · (708) 681-3200 Triiodothyronine T3 Free File of Mar 31, 2026 · source file | $51.87 | $273.00 | $116.30–$228.77 | 81% |
| MacNeal Hospital Berwyn, IL · (708) 783-9100 Triiodothyronine T3 Free File of Mar 31, 2026 · source file | $51.87 | $273.00 | $51.87–$378.11 | 81% |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL R T3 Free by Dialysis Lc-Ms File of Jan 1, 2025 · source file | $52.00 | $80.00 | $10.80–$43.68 | 35% |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL R T3 Free by Dialysis Lc-Ms File of Jan 1, 2025 · source file | $52.00 | $80.00 | $10.80–$43.68 | 35% |
| Loyola University Medical Center Maywood, IL · (708) 216-9000 Triiodothyronine T3 Free File of Mar 31, 2026 · source file | $62.79 | $273.00 | $119.85–$287.74 | 77% |
| La Rabida Children's Hospital Chicago, IL · (773) 363-6700 FREE T3 File of Apr 1, 2026 · source file | $73.63 | $73.63 | — | — |
| Endeavor Health Highland Park Hospital Highland Park, IL HB R T3 FREE BY DIALYSIS LC-MS File of Apr 1, 2026 · source file | $80.00 | $80.00 | — | — |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB R T3 FREE BY DIALYSIS LC-MS File of Apr 1, 2026 · source file | $80.00 | $80.00 | — | — |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB R T3 FREE BY DIALYSIS LC-MS File of Apr 1, 2026 · source file | $80.00 | $80.00 | — | — |
| Franciscan Health Rensselaer Rensselaer, IN · (219) 866-5141 T3; Free File of Jan 1, 2026 · source file | $83.41 | $233.00 | $15.16–$186.40 | 64% |
| Advocate Condell Medical Center Libertyville, IL · (847) 362-2900 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Advocate Lutheran General Hospital Park Ridge, IL · (847) 723-2210 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$151.30 | 50% |
| Advocate Christ Medical Center Oak Lawn, IL · (708) 684-8000 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Advocate Good Samaritan Hospital Downers Grove, IL · (630) 275-5900 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Advocate Trinity Hospital Chicago, IL · (773) 967-5002 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Advocate Childrens Hospital Park Ridge Park Ridge, IL T3, FREE File of Nov 6, 2026 · source file | $85.00 | $170.00 | $15.06–$151.30 | 50% |
| Advocate Sherman Hospital Elgin, IL · (847) 742-9800 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$153.00 | 50% |
| Advocate Good Shepherd Hospital Barrington, IL · (847) 381-9600 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Advocate Illinois Masonic Medical Center Chicago, IL · (773) 975-1600 T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$138.38 | 50% |
| Advocate South Suburban Hospital Hazel Crest, IL T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$165.58 | 50% |
| Advocate Childrens Hospital Oak Lawn Oak Lawn, IL T3, FREE File of Nov 3, 2026 · source file | $85.00 | $170.00 | $15.06–$136.00 | 50% |
| Franciscan Health Dyer Dyer, IN · (219) 865-2141 T3; Free File of Jan 1, 2026 · source file | $86.13 | $319.00 | $15.16–$239.25 | 73% |
| Humboldt Park Health Chicago, IL · (773) 292-8200 Thyroid hormone, T3 measurement, free File of Sep 29, 2026 · source file | $94.67 | $338.10 | $111.57–$355.01 | 72% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Free T3 by Dialysis File of Apr 1, 2026 · source file | $107.10 | $153.00 | $24.48–$153.00 | 30% |
| Morris Hospital Morris, IL · (815) 942-2932 Thyroid hormone, T3 measurement, free File of Oct 27, 2026 · source file | $121.50 | $505.00 | $218.16–$520.15 | 76% |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 Triiodothyronine 3 Free File of Apr 1, 2026 · source file | $124.74 | $462.00 | $14.94–$388.08 | 73% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $32.76–$179.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $26.67–$179.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $34.73–$179.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $34.01–$179.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $34.55–$179.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $12.35–$179.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $29.71–$179.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Triiodothyronine, Total and Free, T3 by Dialysis File of Apr 1, 2026 · source file | $125.30 | $179.00 | $28.64–$179.00 | 30% |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Free T3* File of Jan 1, 2025 · source file | $130.00 | $200.00 | $27.00–$109.20 | 35% |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Free T3* File of Jan 1, 2025 · source file | $130.00 | $200.00 | $27.00–$109.20 | 35% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Free T3 by Dialysis File of Apr 1, 2026 · source file | $132.30 | $189.00 | $28.16–$189.00 | 30% |
| Shriners Childrens - Chicago Chicago, IL · (773) 622-5400 FREE ASSAY (FT-3) File of Mar 19, 2026 · source file | $134.90 | $134.90 | $13.00–$29.11 | — |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 T3 Free Dialysis LC/MS-MS SO+3 more lines at this price File of Mar 17, 2025 · source file | $138.00 | $405.88 | $13.60–$263.82 | 66% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB T3 Free File of Apr 1, 2026 · source file | $148.40 | $212.00 | $31.59–$212.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB T3 Free File of Apr 1, 2026 · source file | $159.60 | $228.00 | $36.48–$228.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB T3 Free File of Apr 1, 2026 · source file | $168.70 | $241.00 | $44.10–$241.00 | 30% |
| Northwest Community Hospital Arlington Heights, IL · (847) 618-1000 Hb Free Assay (Ft-3) File of Apr 1, 2026 · source file | $189.00 | $189.00 | — | — |
| Franciscan Health Crown Point Crown Point, IN · (219) 757-6100 T3; Free File of Jan 1, 2026 · source file | $195.56 | $758.00 | $758.00 | 74% |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB FREE T3* File of Apr 1, 2026 · source file | $200.00 | $200.00 | — | — |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB FREE T3* File of Apr 1, 2026 · source file | $200.00 | $200.00 | — | — |
| Endeavor Health Highland Park Hospital Highland Park, IL HB FREE T3* File of Apr 1, 2026 · source file | $200.00 | $200.00 | — | — |
| Elmhurst Memorial Hospital Elmhurst, IL · (331) 221-1000 HC TRIIODOTHYRONINE T3 FREE File of Apr 1, 2026 · source file | $203.00 | $203.00 | — | — |
| Edward Hospital Naperville, IL · (630) 527-3000 HC TRIIODOTHYRONINE T3 FREE File of Apr 1, 2026 · source file | $203.00 | $203.00 | — | — |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB T3 Free File of Apr 1, 2026 · source file | $219.10 | $313.00 | $59.47–$313.00 | 30% |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 .T4F+T3Free SO+3 more lines at this price File of Mar 17, 2025 · source file | $220.54 | $648.65 | $13.60–$421.62 | 66% |
| Vista Medical Center East Waukegan, IL · (847) 360-3000 T3,FREE File of Mar 31, 2025 · source file | $222.70 | $222.70 | $13.08–$31.40 | — |
| Jackson Park Hospital Foundation Chicago, IL · (773) 947-7500 T3 FREE File of Dec 26, 2025 · source file | $232.41 | $290.51 | — | 20% |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Triiodothyronine T3; Free File of Apr 1, 2026 · source file | $245.00 | $245.00 | — | — |
| Uchicago Medicine Northwest Indiana Crown Point, IN · (312) 755-4706 HC TRIIODOTHYRONINE T3; FREE File of Apr 1, 2026 · source file | $245.00 | $245.00 | — | — |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB T3 Free File of Apr 1, 2026 · source file | $247.10 | $353.00 | $24.36–$353.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB T3 Free File of Apr 1, 2026 · source file | $247.10 | $353.00 | $15.71–$388.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB T3 Free File of Apr 1, 2026 · source file | $271.60 | $388.00 | $64.41–$388.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB T3 Free File of Apr 1, 2026 · source file | $271.60 | $388.00 | $74.88–$388.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Free T3 by Dialysis+1 more line at this price File of Apr 1, 2026 · source file | $274.40 | $392.00 | $27.05–$392.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref T3 Free File of Apr 1, 2026 · source file | $274.40 | $392.00 | $58.41–$392.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref T3 Free+1 more line at this price File of Apr 1, 2026 · source file | $274.40 | $392.00 | $9.13–$439.00 | 30% |
| Mercyhealth Hospital & Medical Center - Harvard Harvard, IL · (815) 943-5431 CHG ASSAY OF TRIIODOTHYRONINE T3 FREE File of Mar 1, 2026 · source file | $297.28 | $396.37 | — | 25% |
| Mercyhealth Crystal Lake Hospital & Medical Center Crystal Lake, IL · (792) 220-5500 CHG ASSAY OF TRIIODOTHYRONINE T3 FREE File of Mar 1, 2026 · source file | $300.98 | $401.31 | — | 25% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Free T3 by Dialysis File of Apr 1, 2026 · source file | $307.30 | $439.00 | $83.41–$439.00 | 30% |
| Jackson Park Hospital Foundation Chicago, IL · (773) 947-7500 T-3 FREE File of Dec 26, 2025 · source file | $319.35 | $399.19 | — | 20% |
| Ann & Robert H. Lurie Children's Hospital of Chicago Chicago, IL · (312) 227-4000 H FREE T3 (TRIIODOTHYRONINE) File of Sep 1, 2026 · source file | $367.50 | $525.00 | $84.00–$498.75 | 30% |
| Methodist Hospital-Southlake Merrillville, IN · (219) 886-4000 Free T3 File of Aug 18, 2026 · source file | $404.60 | $578.00 | $16.94–$514.42 | 30% |
| The Methodist Hospitals Gary, IN · (219) 886-4000 Free T3 File of Aug 18, 2026 · source file | $404.60 | $578.00 | $16.94–$514.42 | 30% |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Triiodothyronine T3; Free File of Apr 1, 2026 · source file | $473.00 | $473.00 | — | — |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Outpatient: lowest $13.43, median $85.00, highest $473.00 — a 35.2× difference within the same market.
As an inpatient, the same code is billed by 40 facilities here, median $85.00. 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 41 of 45 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 5 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 free T3 test is, what the price covers and why prices differ: Free T3 test explained.
2 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84481 ($86.40). 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.
| Hospital | Cash price | File |
|---|---|---|
| Loyola University Medical Center Maywood, ILEwc - Lab Free T3 | $0.01 | file |
| Gottlieb Memorial Hospital Melrose Park, ILEwc - Lab Free T3 | $0.01 | file |
File Link to the hospital's own price file.