Report to us or the managed care organization (MCO) within 24 hours, or within one business day of the initial treatment or visit. If you need medical attention for an injury, fill out the FROI-1 form, regardless of how serious you think the injury is.The First Report of Injury (FROI) form is the starting point for all workers' compensation coverage claims in Ohio. To file a worker's compensation claim in Ohio you must file a First Report of Injury (FROI) with the Ohio BWC or the Managed Care Organization. You will need to fill out a workers' compensation claim form and submit it to your employer. Your employer will then have 14 days to file a report. In Ohio, you are required to report your injury or illness to your employer within one year from the date of the incident. Report an Injury and File a Workers' Compensation Claim. Call Colombo Law Personal Injury Lawyers. To file a worker's compensation claim in Ohio you must file a First Report of Injury (FROI) with the Ohio BWC or the Managed Care Organization.