Free T4 test cost in Denver, CO
In Denver-Aurora-Centennial, CO, 21 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $18.41 to $1,308.50, with a median of $626.36. The lowest listed price is at Denver Health and Hospital Authority — $607.95 less than the median here. Across Colorado, the median is $104.02 at 48 hospitals.
- The median here, $626.36, is 842% above the US median of $66.50.
- That is 69.4× Medicare's 2026 national rate for the same service ($9.02).
- 17 of 21 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 21 facilities across 9 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 30, 2026; the hospital files themselves were last updated between Mar 1, 2026 and Sep 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Denver-Aurora-Centennial, CO.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Denver Health and Hospital Authority lowest Denver, CO · (303) 436-4927 HC THYROXINE FREE STANDOUT File of Apr 30, 2026 · source file | $18.41 | $52.58 | $9.02–$31.55 | 65% |
| Denver Health and Hospital Authority Denver, CO · (303) 436-4927 HC FREE T4 (FT4) File of Apr 30, 2026 · source file | $32.18 | $91.93 | $9.02–$51.48 | 65% |
| Denver Health and Hospital Authority Denver, CO · (303) 436-4927 HC THYROXINE, FREE BY EQUILIBRIUM DIALYSIS/HPLC-TANDEM MASS SPECTROMETRY ARUP 0093244 File of Apr 30, 2026 · source file | $42.56 | $121.59 | $9.02–$68.09 | 65% |
| Denver Health and Hospital Authority Denver, CO · (303) 436-4927 HC FREE T4 BY EQUIL DIALYSIS-TMS File of Apr 30, 2026 · source file | $45.28 | $129.36 | $9.02–$72.44 | 65% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=CSHB T4 FREE BY DIALYSIS File of Apr 17, 2026 · source file | $48.10 | $74.00 | $7.40–$68.08 | 35% |
| National Jewish Health Denver, CO · (303) 388-4461 HC FREE THYROXINE File of Mar 1, 2026 · source file | $49.00 | $70.00 | $9.02–$59.50 | 30% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=T4 FREE DIRECT DIALYSIS S-MAYO File of Apr 17, 2026 · source file | $59.80 | $92.00 | $9.20–$84.64 | 35% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=T4 FREE DIALYSIS File of Apr 17, 2026 · source file | $81.90 | $126.00 | $12.60–$115.92 | 35% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=FREE T4 BY EQUIL DIALYSIS TMS-ARUP File of Apr 17, 2026 · source file | $95.55 | $147.00 | $14.70–$135.24 | 35% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=T4 FREE File of Apr 17, 2026 · source file | $104.65 | $161.00 | $16.10–$148.12 | 35% |
| Childrens Hospital Colorado Aurora, CO · (720) 777-1234 HB=CSHB FREE T4 File of Apr 17, 2026 · source file | $119.60 | $184.00 | $18.40–$169.28 | 35% |
| AdventHealth Littleton Littleton, CO · (303) 730-8900 HC T4 FREE+3 more lines at this price File of Apr 1, 2026 · source file | $158.93 | $158.93 | — | — |
| AdventHealth Castle Rock Castle Rock, CO · (720) 455-5000 HC T4 FREE - THYROXINE FREE+3 more lines at this price File of Apr 1, 2026 · source file | $158.93 | $158.93 | — | — |
| AdventHealth Porter Denver, CO · (303) 778-1955 HC T4 FREE+3 more lines at this price File of Apr 1, 2026 · source file | $158.93 | $158.93 | — | — |
| AdventHealth Parker Parker, CO · (303) 269-4000 HC T4 FREE - THYROXINE FREE+3 more lines at this price File of Apr 1, 2026 · source file | $158.93 | $158.93 | — | — |
| Spalding at Psl Denver, CO · (303) 839-6000 T4 FREE+1 more line at this price File of Sep 1, 2026 · source file | $205.80 | $205.80 | $8.93–$185.22 | — |
| Craig Hospital Englewood, CO HC THYROXINE FREE (FT4) File of Jun 25, 2026 · source file | $335.95 | $881.75 | $7.67–$793.58 | 62% |
| HCA Healthone Swedish Englewood, CO · (303) 788-5000 T4 FREE File of Sep 1, 2026 · source file | $617.86 | $617.86 | $93.91–$556.07 | — |
| HCA Healthone Belmar ER Lakewood, CO · (303) 788-5000 T4 FREE File of Sep 1, 2026 · source file | $626.36 | $626.36 | $95.21–$563.72 | — |
| HCA Healthone Southwest ER Littleton, CO · (303) 788-5000 T4 FREE File of Sep 1, 2026 · source file | $626.36 | $626.36 | $95.21–$563.72 | — |
| HCA Healthone Rose Denver, CO · (303) 320-2121 Thyroxine; free +1 more line at this price File of Sep 1, 2026 · source file | $664.00 | $664.00 | $9.02–$597.60 | — |
| HCA Healthone Central Park ER Denver, CO · (303) 320-2121 Thyroxine; free +1 more line at this price File of Sep 1, 2026 · source file | $664.00 | $664.00 | $9.02–$597.60 | — |
| HCA Healthone Northeast ER Thornton, CO · (303) 451-7800 T4 FREE File of Sep 1, 2026 · source file | $785.82 | $785.82 | $119.44–$707.24 | — |
| HCA Healthone Mountain Ridge Thornton, CO · (303) 451-7800 T4 FREE File of Sep 1, 2026 · source file | $785.82 | $785.82 | $119.44–$707.24 | — |
| HCA Healthone Sky Ridge Lone Tree, CO · (720) 225-1000 Thyroxine; free +1 more line at this price File of Sep 1, 2026 · source file | $902.72 | $902.72 | $9.02–$812.45 | — |
| HCA Healthone South Parker ER Parker, CO Thyroxine; free +1 more line at this price File of Sep 1, 2026 · source file | $902.72 | $902.72 | $9.02–$812.45 | — |
| HCA Healthone Aurora Aurora, CO · (303) 873-5511 Thyroxine; free +1 more line at this price File of Sep 1, 2026 · source file | $1,094.46 | $1,094.46 | $9.02–$985.01 | — |
| Centennial Hospital A Campus of Tmca Englewood, CO · (303) 873-5511 T4 FREE+1 more line at this price File of Sep 1, 2026 · source file | $1,094.46 | $1,094.46 | $9.02–$985.01 | — |
| HCA Healthone Presbyterian St Lukes Denver, CO · (303) 839-6000 T4 FREE+1 more line at this price File of Sep 1, 2026 · source file | $1,308.50 | $1,308.50 | $9.02–$379.46 | — |
Outpatient: lowest $18.41, median $626.36, highest $1,308.50 — a 71.1× difference within the same market.
As an inpatient, the same code is billed by 9 facilities here, median $158.93. 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 4 of 17 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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 T4 test is, what the price covers and why prices differ: Free T4 test explained.