RSV antibody shot (100 mg dose) cost in Boise City, ID
In Boise City, ID, 3 hospitals list a cash price for RSV antibody shot for infants and toddlers, larger dose (1 mL, 100 mg): from $471.90 to $607.13, with a median of $607.13. The lowest listed price is at Saint Alphonsus Regional Medical Center - Boise — $135.23 less than the median here. Across Idaho, the median is $607.13 at 10 hospitals.
Cash prices at 3 facilities across 2 cities for code 90381, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 31, 2026 and Mar 31, 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 Boise City, ID.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Saint Alphonsus Regional Medical Center - Boise lowest Boise, ID · (208) 367-2121 HC Vaccine Respiratory Syncytial Virus Monoclonal Antibody Seasonal Dose 1 Ml Im | $471.90 | $726.00 | $209.09–$1,582.71 | 35% | Mar 31, 2026 source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $607.13 | $607.13 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $607.13 | $607.13 | — | — | — source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $1,292.39 | $1,292.39 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $1,292.39 | $1,292.39 | — | — | — source file |
Outpatient: lowest $471.90, median $607.13, highest $607.13 — a 1.3× difference within the same market.
As an inpatient, the same code is billed by 3 facilities here, median $607.13. 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 the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. 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 is the larger dose (100 mg) of nirsevimab (Beyfortus), an antibody shot that protects infants from severe RSV. Babies weighing 5 kg (11 lb) or more in their first RSV season get this dose, and high-risk toddlers get two of them in their second season.
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, 90472 for each additional one).