Balloon sinuplasty, maxillary cost in Boise City, ID
In Boise City, ID, 4 hospitals list a cash price for balloon dilation of the maxillary sinus opening, one side: from $4,198.35 to $17,730.00, with a median of $10,964.18. The lowest listed price is at Saint Alphonsus Regional Medical Center - Boise and 1 other hospital — $6,765.83 less than the median here. Across Idaho, the median is $17,730.00 at 7 hospitals.
Cash prices at 4 facilities across 2 cities for code 31295, 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 one side lowest Boise, ID · (208) 367-2121 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Lt | $4,198.35 | $6,459.00 | $1,340.76–$34,500.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa one side lowest Nampa, ID · (208) 463-5000 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Rt | $4,198.35 | $6,459.00 | $670.38–$25,000.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa one side lowest Nampa, ID · (208) 463-5000 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Lt | $4,198.35 | $6,459.00 | $670.38–$25,000.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise one side lowest Boise, ID · (208) 367-2121 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Rt | $4,198.35 | $6,459.00 | $1,340.76–$34,500.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID · (208) 463-5000 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Bl | $6,297.85 | $9,689.00 | $670.38–$25,000.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC Endoscopy Nasal Surgical With Dilation Maxillary Sinus Ostium Transnasal or via Canine Fossa Bl | $6,297.85 | $9,689.00 | $1,340.76–$34,500.00 | 35% | Mar 31, 2026 source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $17,730.00 | $17,730.00 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $17,730.00 | $17,730.00 | — | — | — source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $17,730.00 | $17,730.00 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $17,730.00 | $17,730.00 | — | — | — source file |
Outpatient: lowest $4,198.35, median $10,964.18, highest $17,730.00 — a 4.2× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $10,964.18. 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 2 of 2 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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
In this endoscopic procedure a small balloon is passed through the nose and inflated to widen the natural opening of the maxillary (cheek) sinus. It is used for chronic or repeated sinusitis that does not improve with medicine.
What the price covers
The listed price usually covers the procedure for one side; the balloon device may be listed as a separate supply. The surgeon and any anesthesia are billed separately.