Illinois Subscriber
Answer: Ask your neurologist whether 784.3 (Aphasia) or 784.69 (Other symbolic dysfunction; other) are accurate diagnoses. If late effects of a stroke or other cardiovascular disease cause the patient's problem, ask your neurologist about 438.11 (Speech and language deficits; aphasia) or 438.19 (Other speech and language deficits).
If your physician isn't comfortable with these diagnoses, look to something more general like 784.5 (Other speech disturbance).