A SpaceOAR Hydrogel injection costs between $5,924 and $7,185, making it largely unaffordable for those without insurance, or those with high deductibles. Even for those with health insurance, the insurance company may refuse to pay for the medication. The excuse used by the insurer may be that the gel is a preventative medication rather than a treatment. Considering the fact that SpaceOAR has the potential to prevent further medical damage for a prostate cancer patient, you can appeal the denial from your insurance company.