Final answer:
The patient's workers' compensation insurance is responsible for payment.
Step-by-step explanation:
The responsible party for payment of the bill for x-rays required due to an injury at the patient's place of employment would be the patient's workers' compensation insurance.
Workers' compensation insurance is designed to provide medical benefits and compensation to employees who suffer injuries or illnesses while on the job. It covers the costs of medical treatment, including diagnostic tests such as x-rays, for work-related injuries.
Private insurance may also provide coverage, but in this specific scenario, since the injury occurred at the patient's place of employment, workers' compensation insurance is primarily responsible for payment.