Syphilis test (treponemal) cost in St. Louis, MO — inpatient
In St. Louis, MO-IL, 12 hospitals list a cash price for syphilis antibody test (Treponema pallidum) as an inpatient: from $29.34 to $210.96, with a median of $97.59. The lowest listed price is at Gateway Regional Medical Center — $68.25 less than the median here. Across Missouri, the median is $51.00 at 59 hospitals.
Cash prices at 12 facilities across 11 cities for code 86780, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Feb 6, 2026 and Aug 6, 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 |
|---|---|---|---|---|
| Gateway Regional Medical Center lowest Granite City, IL · (618) 798-3000 TREPONEMAL AB source file | $29.34 | $48.90 | $48.90 | 40% |
| Mercy Rehabilitation Hospital South Louis, MO TREPONEMA PALLIDUM File of Mar 16, 2026 · source file | $45.87 | $45.87 | $45.87 | — |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 TREPONEMA PALLIDUM source file | $82.80 | $115.00 | $8.09–$115.00 | 28% |
| Anderson Hospital Maryville, IL · (618) 288-5711 FLUORESCENT TREPONEMAL ABS File of Feb 6, 2026 · source file | $87.20 | $174.40 | $130.80–$156.96 | 50% |
| Community Hospital of Staunton Staunton, IL · (618) 635-2200 FLUORESCENT TREPONEMAL ABS File of Feb 9, 2026 · source file | $88.00 | $176.00 | $149.60–$160.16 | 50% |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL · (618) 234-2120 HC TREPONEMA P AB CONFIRM source file | $96.48 | $134.00 | $8.09–$134.00 | 28% |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 TREPONEMA ABS rfx RPR & QUANT source file | $98.70 | $141.00 | $87.70–$3,396.04 | 30% |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 ASSOC CHG TPPA source file | $100.80 | $144.00 | $89.57–$3,396.04 | 30% |
| Jersey Community Hospital Jerseyville, IL · (618) 498-6402 FTA-Abs QST source file | $139.00 | $139.00 | $72.70–$118.15 | — |
| Mercy Rehabilitation Hospital St. Louis Chesterfield, MO TREPONEMA PALLIDUM File of Mar 16, 2026 · source file | $141.53 | $141.53 | $141.53 | — |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 TREPONEMA PALLIDUM source file | $151.20 | $210.00 | $8.50–$210.00 | 28% |
| St Lukes Rehabilitation Hospital Chesterfield, MO Treponema Pallidum FTA ABS File of Aug 6, 2026 · source file | $193.50 | $193.50 | $135.45–$145.13 | — |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC TREPONEMA P AB CONFIRM source file | $210.96 | $293.00 | $18.83–$293.00 | 28% |
Inpatient: lowest $29.34, median $97.59, highest $210.96 — a 7.2× difference within the same market.
As an outpatient, the same code is billed by 15 facilities here, median $82.80 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 8 of 12 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 treponemal antibody test detects antibodies to the bacterium that causes syphilis. Many labs now screen with it first and confirm with an RPR (86592).
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.