How bad is a potassium level of 5.9 in a 67 yr old type1 diabetic?

Not good: Hi. That's high. It can correlate with advanced kidney disease, or it can correlate with an autoimmune disease that can cluster with type 1 diabetes, Addison's disease. The patient needs to see his/her doc and be evaluated. That potassium needs to come down. Good luck!

Too high: A potassium of 5.9 is too high and your doctor will want to make sure that it comes back down to normal. Potassium levels that are too high can cause heart rhythm abnormalities so this is not something that you want to ignore. Please check with your doctor as soon as possible.