Hi, Most would tell you that if it s been already several months since the stroke then, however, much he s improved to this point is probably the stable plateau upon which he will continue for the foreseeable future. However, I ve seen nontrivial improvements in stroke patients as far out as 18-24 months from when they had their event. Of course, these folks were also aggressively and faithfully rehabilitating almost daily with either supervision or at home with the family but they were actively working to make the affected functions better. Therefore, the real answer is that it is highly dependent upon the amount and time a patient spends day to day rehabilitating and focusing on making functions better that were affected by the stroke. Also, very important for anyone expecting good or full recovery is strict control of risk factors. Glycemias of 350-450 are significant risk factors for recurrent stroke and will also reduce his ability to rehabilitate if, in fact, that s what he s doing now. Many good thoughts and hopes that your father can find a way to get his diabetes under better control so that he may be able to fully come back from his stroke. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Dariush Saghafi, Neurologist