Total T4 test cost in Chicago, IL — inpatient
In Chicago-Naperville-Elgin, IL-IN, 40 hospitals list a cash price for total thyroxine (T4) blood test as an inpatient: from $6.00 to $265.00, with a median of $85.00. The lowest listed price is at Uchicago Medicine AdventHealth La Grange and 3 other hospitals — $79.00 less than the median here. Across Illinois, the median is $81.90 at 112 hospitals.
Cash prices at 40 facilities across 28 cities for code 84436, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Mar 17, 2025 and Apr 1, 2026.
Lowest$6.00Uchicago Medicine AdventHealth La Grange + 3 more
Median$85.00half pay less
Highest$265.00in this market
Difference44.2×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 $6.00Highest $265.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC ASSAY OF TOTAL THYROXINE - T4 (THYROID HORMONE) RIA | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC THYROXINE T4 TOTAL - ARUP | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC THYROXINE T4 TOTAL - ARUP | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC THYROXINE T4 TOTAL | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC ASSAY OF TOTAL THYROXINE - T4 (THYROID HORMONE) RIA | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC THYROXINE T4 TOTAL | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC THYROXINE T4 TOTAL | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC THYROXINE T4 TOTAL - ARUP | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC ASSAY OF TOTAL THYROXINE - T4 (THYROID HORMONE) RIA | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC THYROXINE T4 TOTAL - ARUP | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC ASSAY OF TOTAL THYROXINE - T4 (THYROID HORMONE) RIA | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC THYROXINE T4 TOTAL | $6.00 | $24.00 | — | 75% | Apr 1, 2026 source file |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 THYROXINE (T-4) TOTAL | $12.60 | $18.00 | $1.93–$16.06 | 30% | — source file |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC T4 THYROID PANEL WITH FTI - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC T4 THYROID PANEL WITH FTI - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC THYROID T4 - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC THYROID T4 - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC T4 THYROID PANEL WITH FTI - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC T4 THYROID PANEL WITH FTI - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC THYROID T4 - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC THYROID T4 - ARUP | $31.25 | $125.00 | — | 75% | Apr 1, 2026 source file |
| Presence Saint Joseph Hospital - Chicago Chicago, IL · (773) 665-3000 HC T-4 (THYROXINE) TOTAL, SERUM | $39.60 | $120.00 | $6.87–$28.60 | 67% | — source file |
| Franciscan Health Rensselaer Rensselaer, IN · (219) 866-5141 Thyroxine; Total 392 | $40.45 | $113.00 | $6.15–$90.40 | 64% | — source file |
| La Rabida Children's Hospital Chicago, IL · (773) 363-6700 T4 | $44.71 | $44.71 | — | — | Apr 1, 2026 source file |
| Franciscan Health Munster Munster, IN · (219) 922-4200 Thyroxine; Total 392 | $53.04 | $249.00 | — | 79% | — source file |
| Franciscan Health Dyer Dyer, IN · (219) 865-2141 Thyroxine; Total 392 | $67.23 | $249.00 | $6.15–$186.75 | 73% | — source file |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Thyroxine (T4); Total (P) | $81.90 | $126.00 | $20.54–$67.41 | 35% | — source file |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Thyroxine (T4); Total (P) | $81.90 | $126.00 | $20.54–$67.41 | 35% | — source file |
| Franciscan Health Crown Point Crown Point, IN · (219) 757-6100 Thyroxine; Total 392 | $82.30 | $319.00 | $319.00 | 74% | — source file |
| Mercyhealth Hospital & Medical Center - Harvard Harvard, IL · (815) 943-5431 CHG ASSAY OF THYROXINE TOTAL | $83.36 | $111.14 | — | 25% | Mar 1, 2026 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 Thyroxine (T4) SO | $83.83 | $246.57 | $160.27 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 84436 THYROXINE TOTAL | $83.83 | $246.57 | $160.27 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 Thyroid Panel With TSH SO | $83.83 | $246.57 | $160.27 | 66% | Mar 17, 2025 source file |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Thyroxine/T4* | $84.50 | $130.00 | $21.19–$69.55 | 35% | — source file |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Thyroxine/T4* | $84.50 | $130.00 | $21.19–$69.55 | 35% | — source file |
| Advocate Sherman Hospital Elgin, IL · (847) 742-9800 T4, TOTAL | $85.00 | $170.00 | $74.29–$153.00 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Oak Lawn Oak Lawn, IL T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Trinity Hospital Chicago, IL · (773) 967-5002 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Christ Medical Center Oak Lawn, IL · (708) 684-8000 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Good Samaritan Hospital Downers Grove, IL · (630) 275-5900 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Condell Medical Center Libertyville, IL · (847) 362-2900 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate South Suburban Hospital Hazel Crest, IL T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Illinois Masonic Medical Center Chicago, IL · (773) 975-1600 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Park Ridge Park Ridge, IL T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Good Shepherd Hospital Barrington, IL · (847) 381-9600 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Advocate Lutheran General Hospital Park Ridge, IL · (847) 723-2210 T4, TOTAL | $85.00 | $170.00 | $74.29–$136.00 | 50% | Nov 4, 2025 source file |
| Mercyhealth Crystal Lake Hospital & Medical Center Crystal Lake, IL · (792) 220-5500 CHG ASSAY OF THYROXINE TOTAL | $97.97 | $130.63 | — | 25% | Mar 1, 2026 source file |
| Elmhurst Memorial Hospital Elmhurst, IL · (331) 221-1000 HC THYROXINE TOTAL | $99.00 | $99.00 | — | — | Apr 1, 2026 source file |
| Edward Hospital Naperville, IL · (630) 527-3000 HC THYROXINE TOTAL | $99.00 | $99.00 | — | — | Apr 1, 2026 source file |
| Northwest Community Hospital Arlington Heights, IL · (847) 618-1000 Hb Assay Of Total Thyroxine | $123.00 | $123.00 | — | — | Apr 1, 2026 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 Thyroxine (T4) SO | $123.51 | $363.25 | $236.11 | 66% | Mar 17, 2025 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 T4 Total | $123.51 | $363.25 | $236.11 | 66% | Mar 17, 2025 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 Thyroid Panel With TSH SO | $123.51 | $363.25 | $236.11 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 T4 Total | $123.51 | $363.25 | $236.11 | 66% | Mar 17, 2025 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 84436 THYROXINE TOTAL | $123.51 | $363.25 | $236.11 | 66% | Mar 17, 2025 source file |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB THYROXINE (T4); TOTAL (P) | $126.00 | $126.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Highland Park Hospital Highland Park, IL HB THYROXINE (T4); TOTAL (P) | $126.00 | $126.00 | — | — | Apr 1, 2026 source file |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB THYROXINE (T4); TOTAL (P) | $126.00 | $126.00 | — | — | Apr 1, 2026 source file |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB THYROXINE/T4* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB THYROXINE/T4* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Highland Park Hospital Highland Park, IL HB THYROXINE/T4* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 Thyroxine 4 Total | $133.20 | $370.00 | $88.80–$310.80 | 64% | Apr 1, 2026 source file |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 Thyroxine 4 Total (CQ) | $133.20 | $370.00 | $88.80–$310.80 | 64% | Apr 1, 2026 source file |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 Q7020 T4 THYRO TOT | $133.20 | $370.00 | $88.80–$310.80 | 64% | Apr 1, 2026 source file |
| Ann & Robert H. Lurie Children's Hospital of Chicago Chicago, IL · (312) 227-4000 H T4 (THYROXINE) TOTAL ONLY SERUM | $175.70 | $251.00 | $92.87–$3,678.00 | 30% | — source file |
| Jackson Park Hospital Foundation Chicago, IL · (773) 947-7500 T4 TEST | $177.23 | $221.54 | — | 20% | — source file |
| Uchicago Medicine Northwest Indiana Crown Point, IN · (312) 755-4706 HC THYROXINE; TOTAL | $215.00 | $215.00 | — | — | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Thyroxine; Total | $215.00 | $215.00 | — | — | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Thyroxine; Total | $265.00 | $265.00 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $6.00, median $85.00, highest $265.00 — a 44.2× difference within the same market.
As an outpatient, the same code is billed by 63 facilities here, median $81.90 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 19 of 22 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
A total T4 test measures all the thyroxine hormone in the blood, both bound and free. Most doctors now order free T4 (84439) instead, which is less affected by pregnancy and medicines.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.