Sinus surgery, frontal cost in Riverside, CA
In Riverside-San Bernardino-Ontario, CA, 4 hospitals list a cash price for endoscopic sinus surgery: opening the frontal sinus: from $3,099.20 to $14,842.18, with a median of $3,099.20. The lowest listed price is at Kaiser Foundation Hospital - Riverside and 2 other hospitals. Across California, the median is $9,923.20 at 44 hospitals.
Cash prices at 4 facilities across 3 cities for code 31276, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Riverside-San Bernardino-Ontario, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Kaiser Foundation Hospital - Riverside lowest Riverside, CA · (951) 353-2000 NASAL/SINUS NDSC W/RMVL TISS FROM FRONTAL SINUS | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Fontana lowest Fontana, CA · (909) 427-5000 NASAL/SINUS NDSC W/RMVL TISS FROM FRONTAL SINUS | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Moreno Valley lowest Moreno Valley, CA · (951) 251-6530 NASAL/SINUS NDSC W/RMVL TISS FROM FRONTAL SINUS | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Riverside University Medical Center Moreno Valley, CA · (951) 486-4000 HC Nasal/Sinus Endoscopy With Frontal Sinus Exploration Including Removal of Tissue From Frontal Sinus | $14,842.18 | $14,842.18 | $337.68–$14,842.18 | — | — source file |
| Riverside University Medical Center Moreno Valley, CA · (951) 486-4000 HC Nasal/Sinus Endoscopy With Frontal Sinus Exploration Including Removal of Tissue From Frontal Sinus | $14,842.18 | $14,842.18 | $337.68–$14,842.18 | — | — source file |
Outpatient: lowest $3,099.20, median $3,099.20, highest $14,842.18 — a 4.8× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $3,099.20. 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 3 of 4 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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 code covers endoscopic surgery through the nose to open the frontal sinus, above the eyes.
What the price covers
The hospital price usually covers the operating room, recovery and supplies. The surgeon and anesthesia usually bill separately.