Fibrinogen test cost in St. Louis, MO
In St. Louis, MO-IL, 15 hospitals list a cash price for fibrinogen blood test: from $20.88 to $123.15, with a median of $79.80. The lowest listed price is at St Josephs Hospital Hospital Sisters Third Order of St Francis — $58.92 less than the median here. Across Missouri, the median is $89.05 at 63 hospitals.
Cash prices at 15 facilities across 13 cities for code 85384, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 6, 2026 and Feb 9, 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 St. Louis, MO-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| St Josephs Hospital Hospital Sisters Third Order of St Francis lowest Breese, IL · (618) 526-4511 FIBRINOGEN ACTIVITY | $20.88 | $29.00 | $3.11–$29.00 | 28% | — source file |
| Mercy Hospital St Louis Saint Louis, MO · (314) 251-6000 Fibrinogen Activity | $22.75 | $35.00 | $8.75–$21.87 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO · (636) 933-1000 Fibrinogen Activity | $22.75 | $35.00 | $8.75–$21.87 | 35% | — source file |
| Mercy Hospital Washington Washington, MO · (636) 239-8000 Fibrinogen Activity | $22.75 | $35.00 | $8.75–$14.44 | 35% | — source file |
| Touchette Regional Hospital Cahokia Heights, IL · (618) 332-3060 Fibrinogen; activity | $46.50 | $75.00 | $2.84–$71.00 | 38% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 FIBRINOGEN ACTIVITY | $50.18 | $83.64 | $83.64 | 40% | — source file |
| Shriners Childrens - St Louis Saint Louis, MO · (314) 432-3600 FIBRINOGEN ACTIVITY | $66.80 | $66.80 | $7.67–$14.60 | — | — source file |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 FIBRINOGEN | $79.80 | $114.00 | $41.04–$162.86 | 30% | — source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL · (618) 234-2120 HC FIBRINOGEN | $79.92 | $111.00 | $3.11–$111.00 | 28% | — source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC FIBRINOGEN | $85.68 | $119.00 | $7.24–$119.00 | 28% | — source file |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Fibrinogen Activity | $89.05 | $137.00 | $8.75–$21.87 | 35% | — source file |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 Fibrinogen Activity | $96.20 | $148.00 | $9.72–$13.48 | 35% | — source file |
| Anderson Hospital Maryville, IL · (618) 288-5711 FIBRINOGEN | $103.80 | $207.60 | $9.09–$186.84 | 50% | Feb 6, 2026 source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC FIBRINOGEN | $117.36 | $163.00 | $3.27–$163.00 | 28% | — source file |
| Community Hospital of Staunton Staunton, IL · (618) 635-2200 FIBRINOGEN | $123.15 | $246.30 | $71.21–$224.13 | 50% | Feb 9, 2026 source file |
| Mercy Hospital St Louis Saint Louis, MO · (314) 251-6000 POC Fibrinogen Activity | $148.85 | $229.00 | $14.89–$229.00 | 35% | — source file |
Outpatient: lowest $20.88, median $79.80, highest $123.15 — a 5.9× difference within the same market.
As an inpatient, the same code is billed by 10 facilities here, median $82.80. 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 9 of 15 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 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 fibrinogen test measures a clotting protein. It is used for unexplained bleeding, before some surgeries and in severe illness to check clotting.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.