Workman’s comp or worker’s compensation is a type of insurance the employers carry in case an employee is injured while working. This insurance provides benefits for medical care, supplemental income, and rehab until you meet a certain recovery threshold where you are fully healed and can return to work or have recovered as much as possible and will recover no further. SSDI is a benefits program available from the SSA that provides monthly payments and other benefits for individuals who were injured and become disabled or meet one of the other qualifying conditions.