Sinus surgery, maxillary cost in Boise City, ID — inpatient
In Boise City, ID, 3 hospitals list a cash price for endoscopic sinus surgery: opening the maxillary (cheek) sinus as an inpatient: from $600.00 to $9,904.00, with a median of $9,904.00. The lowest listed price is at Saint Alphonsus Regional Medical Center - Boise — $9,304.00 less than the median here. Across Idaho, the median is $9,904.00 at 6 hospitals.
Cash prices at 3 facilities across 2 cities for code 31256, as an inpatient (admitted to hospital) . 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 PR Nasal/Sinus Endoscopy Surgical With Maxillary Antrostomy | $600.00 | $600.00 | $48.67–$1,080.00 | — | Mar 31, 2026 source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $9,904.00 | $9,904.00 | — | — | — source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $9,904.00 | $9,904.00 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $9,904.00 | $9,904.00 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $9,904.00 | $9,904.00 | — | — | — source file |
Inpatient: lowest $600.00, median $9,904.00, highest $9,904.00 — a 16.5× difference within the same market.
As an outpatient, the same code is billed by 3 facilities here, median $9,904.00 — that is the price to compare if you are not being admitted.
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 code covers endoscopic surgery through the nose to widen the natural opening of the maxillary sinus behind the cheek.
What the price covers
The hospital price usually covers the operating room, recovery and supplies. The surgeon and anesthesia usually bill separately.