Free T4 thyroid test cost in Illinois

Prices at 89 hospitals in Illinois, from their machine-readable files. Here the median cash price is $106 — 54% above the US median ($69), roughly 11.8× the Medicare rate.

Lowest cash prices

HospitalLocationCashInsurerCMS ratingER waitReadmit
John H Stroger Jr Hospital Chicago, IL $16 $7 ★ 2/5 293 min —
Provident Hospital of Chicago Chicago, IL $16 $7 — 190 min —
Mason District Hospital Havana, IL $22 $22 — 104 min —
Saint Anthony Hospital Chicago, IL $26 $38 ★ 2/5 181 min —
Mc Donough District Hospital Macomb, IL $30 $13 ★ 3/5 145 min —
Saint Joseph Medical Center Joliet, IL $35 $11 ★ 1/5 197 min —
Presence St Marys Hospital Kankakee, IL $35 $11 ★ 4/5 137 min —
Presence Mercy Medical Center Aurora, IL $35 $11 ★ 3/5 189 min —
Presence Saints Mary and Elizabeth Medical Center Chicago, IL $35 $11 ★ 3/5 192 min —
Saint Joseph Hospital-Elgin Elgin, IL $35 $11 ★ 4/5 139 min —
Presence Saint Joseph Hospital-Chicago Chicago, IL $35 $11 ★ 4/5 146 min —
Carle Foundation Hospital Urbana, IL $38 $18 ★ 2/5 214 min —
Carle Hoopeston Regional Health Center Hoopeston, IL $39 $28 — — —
Gateway Regional Medical Center Granite City, IL $40 — ★ 2/5 140 min —
Alton Memorial Hospital Alton, IL $44 $44 ★ 4/5 196 min —
Carle Health Methodist Hospital Peoria, IL $55 $12 ★ 2/5 213 min —
Trinity Rock Island Rock Island, IL $55 $9 ★ 3/5 172 min —
University of Illinois Hospital and Clinics Chicago, IL $61 $9 ★ 4/5 298 min —
Advocate Sherman Hospital Elgin, IL $65 $24 ★ 4/5 193 min —
Advocate Trinity Hospital Chicago, IL $65 $47 ★ 2/5 247 min —
Advocate Illinois Masonic Medical Center Chicago, IL $65 $47 ★ 3/5 237 min —
Advocate Condell Medical Center Libertyville, IL $65 $37 ★ 4/5 214 min —
Advocate Christ Hospital & Medical Center Oak Lawn, IL $65 $46 ★ 3/5 229 min —
Advocate Lutheran General Hospital Park Ridge, IL $65 $47 ★ 4/5 216 min —
Advocate Good Samaritan Hospital Downers Grove, IL $65 $47 ★ 4/5 187 min —

CMS rating = overall hospital star rating (1–5); ER wait = median minutes in the emergency department; Readmit = 30-day readmission rate (lower is better) — all from Medicare’s Care Compare; “—” = not reported. Data last updated October 2026. Prices from hospitals’ machine-readable files (45 CFR §180); Medicare benchmark from CMS PFS/CLFS/IPPS. Prices below 15% of the median are excluded as likely partial or mis-coded charges. Estimates — confirm with the hospital. Report an incorrect price.

Price comparison (median)

Chargemaster (list price)
$156
Cash / self-pay
$106
Insurer-negotiated
$27
Medicare pays
$9
$35$216
Median cash $106  ·  Medicare $9  ·  bar = typical cash range (10th–90th percentile)
Is this a fair price?
1× Medicarefair ≈2×5×+

Typical cash price here is $106 — about 11.8× the Medicare rate ($9). High vs Medicare. A fair cash price is usually within ~2× Medicare ($18).

💡 Asking for the cash price instead of the $156 list price could save about $50 (32%).

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Rough estimate from this procedure’s median insurer-negotiated rate. Your actual cost depends on your plan — confirm with your insurer.

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