Flu shot cost in St. Louis, MO
In St. Louis, MO-IL, 10 hospitals list a cash price for flu shot, standard dose, preservative-free, for age 6 months and older: from $13.65 to $89.17, with a median of $67.95. The lowest listed price is at Mercy Hospital St Louis — $54.30 less than the median here. Across Missouri, the median is $59.66 at 23 hospitals.
Cash prices at 10 facilities across 8 cities for code 90656, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Jun 12, 2026 and Jun 12, 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 |
|---|---|---|---|---|---|
| Mercy Hospital St Louis lowest Saint Louis, MO Vfc Influenza Vaccine Trivalent Split 3+Yrs | $13.65 | $21.00 | $87.00–$107.00 | 35% | — source file |
| Mercy Hospitals East Communities Washington, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Iiv3 Vacc Preservative Free 0.5 Ml Dosage Im Use | $29.25 | $39.00 | $19.50–$35.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital St Louis Saint Louis, MO FLU VACCINE TRIV 2025-26 (6MOS UP)(PF) 45 MCG(15MCG X3)/0.5 ML IM SYRINGE | $54.53 | $83.90 | $5.45–$83.90 | 35% | — source file |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 FLU VACCINE TRIV 2025-26 (6MOS UP)(PF) 45 MCG(15MCG X3)/0.5 ML IM SYRINGE | $64.15 | $98.70 | $31.09 | 35% | — source file |
| Mercy Hospital Washington Washington, MO FLU VACCINE TRIV 2025-26 (6MOS UP)(PF) 45 MCG(15MCG X3)/0.5 ML IM SYRINGE | $64.15 | $98.70 | $29.95 | 35% | — source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 INFLUENZA VACCINE 0.5 ML SUSY per 0.5 mL | $71.75 | $99.65 | $19.93–$99.65 | 28% | — source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL INFLUENZA VACCINE 0.5 ML SUSY per 0.5 mL | $71.75 | $99.65 | $16.94–$99.65 | 28% | — source file |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 INFLUENZA VACCINE 0.5 ML SUSY per 0.5 mL | $71.75 | $99.65 | $17.94–$99.65 | 28% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 INFLUENZA VACCINE 0.5 ML SUSY per 0.5 mL | $72.00 | $100.00 | $19.34–$100.00 | 28% | — source file |
| Mercy Hospital South Saint Louis, MO · (314) 525-1000 FLU VACCINE TRIV 2025-26 (6MOS UP)(PF) 45 MCG(15MCG X3)/0.5 ML IM SYRINGE | $89.17 | $137.19 | $8.92–$137.19 | 35% | — source file |
Outpatient: lowest $13.65, median $67.95, highest $89.17 — a 6.5× difference within the same market.
As an inpatient, the same code is billed by 6 facilities here, median $71.75. 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 8 of 10 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 standard-dose flu shot protects against the influenza strains expected in the coming season, and the formula changes every year. This code is the preservative-free version given to most people.
What the price covers
The price is for the vaccine dose. Giving the shot is usually a separate line (code 90471 for the first vaccine of the visit); Medicare bills use G0008 instead.