What are my options to appeal case? Can any doctor give a statement of certainty to an injury?

You should get another opinion, if possible. Whether that will or will not help depends upon a statement from a doctor that has less wiggle room than the one quoted. Good luck to you.

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This information is being provided for educational purposes only as I do not practice in GA.

You did not mention if the physician was the WC carrier's doctor or your own doctor. Many states' workers compensation laws have set rules and regulations regarding second opinions. You should contact a local attorney who handles WC matters. Morgan & Morgan in Atlanta handles these matters. www.forthepeople.com - I am not affiliated with the firm.