Sinus surgery, full ethmoid cost in Los Angeles, CA
In Los Angeles-Long Beach-Anaheim, CA, 11 hospitals list a cash price for endoscopic sinus surgery: full ethmoid sinus opening: from $1,550.64 to $5,642.80, with a median of $3,099.20. The lowest listed price is at Cedars-Sinai Marina Hospital — $1,548.56 less than the median here. Across California, the median is $10,880.80 at 42 hospitals.
Cash prices at 11 facilities across 9 cities for code 31255, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Nov 26, 2025 and Nov 26, 2025.
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 |
|---|---|---|---|---|---|
| Cedars-Sinai Marina Hospital lowest Marina del Rey, CA · (310) 823-8911 Outpatient Surgical Services | $1,550.64 | $2,385.60 | $5,917.12–$9,553.29 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Ambulatory Surgery û Cigna Grouper Schedule* Grouper 5 | $1,807.31 | $2,780.47 | $5,917.12–$9,553.29 | 35% | Nov 26, 2025 source file |
| Kaiser Foundation Hospital - Los Angeles Los Angeles, CA · (323) 783-4011 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - South Bay Harbor City, CA · (310) 325-5111 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Baldwin Park Baldwin Park, CA · (626) 851-1011 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - West la Los Angeles, CA · (213) 857-2201 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA · (818) 719-3800 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Irvine Irvine, CA NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Panorama City Panorama City, CA · (818) 375-2000 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Downey Downey, CA · (562) 461-6007 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Anaheim Anaheim, CA · (714) 279-4000 NASAL/SINUS NDSC W/TOTAL ETHOIDECTOMY | $3,099.20 | $5,960.00 | $6,867.00–$20,425.00 | 48% | — source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 Outpatient Surgical Group 5 | $5,642.80 | $8,681.23 | $19,539.84–$29,009.34 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 OPG - 4 | $18,447.52 | $28,380.80 | $6,339.55–$9,553.29 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 Outpatient Grouper - 4 | $24,184.55 | $37,207.00 | $19,539.84–$29,009.34 | 35% | Nov 26, 2025 source file |
Outpatient: lowest $1,550.64, median $3,099.20, highest $5,642.80 — a 3.6× difference within the same market.
As an inpatient, the same code is billed by 10 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 11 of 11 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 11 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 all of the ethmoid sinuses, between the eyes.
What the price covers
The hospital price usually covers the operating room, recovery and supplies. The surgeon and anesthesia usually bill separately.