If your claim is denied, you have 45 days to request a hearing to challenge the denial. There is no specific deadline for requesting a hearing. If you pursue a hearing within 45 days, you can request an expedited hearing (which gets set within 60 days of the hearing application). If you request a hearing outside the 45 days, it's a regular setting time frame of 120 days. If you fail to pursue the claim within 6 months, the insurance carrier can file a motion to close the claim for lack of prosecution. Workers' comp claims can be denied for any reason deemed sufficient by the insurance company. In some cases, applications are denied in error. Regardless of the reason, it's strongly recommended that you consult a work injury attorney at this point to discuss your legal options going forward.