Syphilis test (treponemal) cost in St. Louis, MO
In St. Louis, MO-IL, 15 hospitals list a cash price for syphilis antibody test (Treponema pallidum): from $8.45 to $210.96, with a median of $82.80. The lowest listed price is at Mercy Hospital Washington and 1 other hospital — $74.35 less than the median here. Across Missouri, the median is $50.34 at 58 hospitals.
Cash prices at 15 facilities across 14 cities for code 86780, 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 Jun 10, 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 |
|---|---|---|---|---|
| Mercy Hospital Washington lowest Washington, MO · (636) 239-8000 Syphilis Total File of Jun 10, 2026 · source file | $8.45 | $13.00 | $0.85–$11.70 | 35% |
| Mercy Hospital Jefferson lowest Festus, MO · (636) 933-1000 Syphilis Total File of Jun 10, 2026 · source file | $8.45 | $13.00 | $0.85–$13.00 | 35% |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 TREPONEMAL AB File of Mar 30, 2026 · source file | $29.34 | $48.90 | $48.90 | 40% |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Mha Treponema Pallidum Ab by Tp-Pa File of Jun 10, 2026 · source file | $35.75 | $55.00 | $11.92–$29.79 | 35% |
| Mercy Hospital Washington Washington, MO · (636) 239-8000 Mha Treponema Pallidum Ab by Tp-Pa File of Jun 10, 2026 · source file | $35.75 | $55.00 | $11.92–$22.38 | 35% |
| Mercy Hospital Jefferson Festus, MO · (636) 933-1000 Fta Treponema Pallidum File of Jun 10, 2026 · source file | $35.75 | $55.00 | $11.92–$29.79 | 35% |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Fta Treponema Pallidum File of Jun 10, 2026 · source file | $43.55 | $67.00 | $11.92–$29.79 | 35% |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 Syphilis Total File of Jun 10, 2026 · source file | $47.45 | $73.00 | $4.75–$73.00 | 35% |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Syphilis Total File of Jun 10, 2026 · source file | $48.75 | $75.00 | $4.88–$75.00 | 35% |
| Mercy Hospital Jefferson Festus, MO · (636) 933-1000 Mha Treponema Pallidum Ab by Tp-Pa File of Jun 10, 2026 · source file | $51.35 | $79.00 | $5.14–$79.00 | 35% |
| Mercy Hospital Washington Washington, MO · (636) 239-8000 Fta Treponema Pallidum File of Jun 10, 2026 · source file | $56.55 | $87.00 | $5.66–$78.30 | 35% |
| Touchette Regional Hospital Cahokia Heights, IL · (618) 332-3060 Antibody; Treponema pallidum File of Apr 13, 2026 · source file | $61.38 | $99.00 | $3.76–$94.00 | 38% |
| Mercy Hospital St Louis Saint Louis, MO · (314) 251-6000 Syphilis Total File of Jun 4, 2026 · source file | $62.40 | $96.00 | $6.24–$96.00 | 35% |
| Mercy Hospital St Louis Saint Louis, MO · (314) 251-6000 Fta Treponema Pallidum+2 more lines at this price File of Jun 4, 2026 · source file | $64.35 | $99.00 | $6.44–$99.00 | 35% |
| Mercy Hospital Jefferson Festus, MO · (636) 933-1000 Syphilis Igg File of Jun 10, 2026 · source file | $64.35 | $99.00 | $11.92–$29.79 | 35% |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 TREPONEMA PALLIDUM File of Mar 24, 2026 · source file | $82.80 | $115.00 | $8.09–$115.00 | 28% |
| Mercy Hospital Washington Washington, MO · (636) 239-8000 Syphilis Igg File of Jun 10, 2026 · source file | $83.85 | $129.00 | $11.92–$22.38 | 35% |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 Fta Treponema Pallidum+2 more lines at this price File of Jun 10, 2026 · source file | $85.15 | $131.00 | $8.52–$131.00 | 35% |
| Anderson Hospital Maryville, IL · (618) 288-5711 FLUORESCENT TREPONEMAL ABS File of Feb 6, 2026 · source file | $87.20 | $174.40 | $12.38–$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 | $50.88–$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 File of Mar 24, 2026 · source file | $96.48 | $134.00 | $8.09–$134.00 | 28% |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 TREPONEMA ABS rfx RPR & QUANT File of Mar 21, 2026 · source file | $98.70 | $141.00 | $50.76–$201.43 | 30% |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 ASSOC CHG TPPA File of Mar 21, 2026 · source file | $100.80 | $144.00 | $51.84–$205.71 | 30% |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Syphilis Igg File of Jun 10, 2026 · source file | $102.05 | $157.00 | $11.92–$29.79 | 35% |
| Jersey Community Hospital Jerseyville, IL · (618) 498-6402 FTA-Abs QST File of Mar 10, 2026 · source file | $139.00 | $139.00 | $72.70–$118.15 | — |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 TREPONEMA PALLIDUM File of Mar 24, 2026 · source file | $151.20 | $210.00 | $8.50–$210.00 | 28% |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC TREPONEMA P AB CONFIRM File of Mar 24, 2026 · source file | $210.96 | $293.00 | $18.83–$293.00 | 28% |
Outpatient: lowest $8.45, median $82.80, highest $210.96 — a 25.0× difference within the same market.
As an inpatient, the same code is billed by 9 facilities here, median $96.48. 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 13 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 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.