Sinus surgery, maxillary cost in Los Angeles, CA — inpatient
In Los Angeles-Long Beach-Anaheim, CA, 11 hospitals list a cash price for endoscopic sinus surgery: opening the maxillary (cheek) sinus as an inpatient: from $1,695.20 to $16,622.50, with a median of $1,695.20. The lowest listed price is at Kaiser Foundation Hospital - Los Angeles and 8 other hospitals. Across California, the median is $6,658.40 at 47 hospitals.
Cash prices at 11 facilities across 9 cities for code 31256, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 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 Los Angeles-Long Beach-Anaheim, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Kaiser Foundation Hospital - Los Angeles lowest Los Angeles, CA · (323) 783-4011 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Woodland Hills lowest Woodland Hills, CA · (818) 719-3800 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Irvine lowest Irvine, CA NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Baldwin Park lowest Baldwin Park, CA · (626) 851-1011 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - West la lowest Los Angeles, CA · (213) 857-2201 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Panorama City lowest Panorama City, CA · (818) 375-2000 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Downey lowest Downey, CA · (562) 461-6007 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Anaheim lowest Anaheim, CA · (714) 279-4000 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| Kaiser Foundation Hospital - South Bay lowest Harbor City, CA · (310) 325-5111 NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $1,695.20 | $3,260.00 | $3,658.00–$10,879.00 | 48% | — source file |
| UCI Health-Orange Orange, CA · (714) 456-7890 HB NASAL/SINUS ENDOSCOPY W/MAXILLARY ANTROSTOMY | $4,139.60 | $10,349.00 | — | 60% | Apr 1, 2026 source file |
| Keck Hospital of USC Los Angeles, CA · (323) 442-8656 Nasal/Sinus Endoscopy W/Maxillary Antrostomy | $16,622.50 | $16,622.50 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $1,695.20, median $1,695.20, highest $16,622.50 — a 9.8× difference within the same market.
As an outpatient, the same code is billed by 12 facilities here, median $1,695.20 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 9 of 9 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 9 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 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.