H. pylori stool test cost in St. Louis, MO
In St. Louis, MO-IL, 8 hospitals list a cash price for H. pylori stool antigen test: from $14.64 to $619.20, with a median of $109.35. The lowest listed price is at Ranken Jordan Home for Convalescent Crippled Children Hospital — $94.71 less than the median here. Across Missouri, the median is $118.30 at 26 hospitals.
Cash prices at 8 facilities across 7 cities for code 87338, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 24, 2026 and Apr 24, 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 |
|---|---|---|---|---|---|
| Ranken Jordan Home for Convalescent Crippled Children Hospital lowest Maryland Heights, MO · (314) 872-6400 Helicobacter pylori Antigen, EIA, Stool | $14.64 | $18.29 | — | 20% | Apr 24, 2026 source file |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 Helicobacter Pylori Stool Eia | $85.80 | $132.00 | $8.58–$132.00 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Helicobacter Pylori Stool Eia | $90.35 | $139.00 | $9.95–$32.36 | 35% | — source file |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 Helicobacter Pylori Stool Eia | $108.55 | $167.00 | $10.86–$167.00 | 35% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 HPYLORI,STOOL,EIA | $110.14 | $183.56 | $183.56 | 40% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 Q34838 HPYLAG EIA IA | $110.14 | $183.56 | $183.56 | 40% | — source file |
| Mercy Hospital Washington Washington, MO Helicobacter Pylori Stool Eia | $141.70 | $218.00 | $9.95–$21.35 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Helicobacter Pylori Stool Eia | $156.65 | $241.00 | $9.95–$32.36 | 35% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC EIA QL H PYLORI AG STOOL-90 | $619.20 | $860.00 | $7.78–$860.00 | 28% | — source file |
Outpatient: lowest $14.64, median $109.35, highest $619.20 — a 42.3× difference within the same market.
As an inpatient, the same code is billed by 5 facilities here, median $110.14. 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 7 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
This stool test finds H. pylori, the stomach bacteria behind most ulcers. It shows an active infection and is used both to diagnose it and to confirm a cure.
What the price covers
The price usually covers running the stool test; the collection kit is often included.