Welcome to Just Answer and thanks for your question. A 78-year-old non-African American male with creatinine of 4.6 would have an estimated glomerular filtration rate of 11.3 ml/min/1.73m² , which is stage 4 kidney failure.
Observe. Control blood pressure
Mildly reduced kidney function.
Control blood pressure. Monitor kidneys closely.
Moderately reduced function,
Continue above. If not already diagnosed, determine why kidneys are failing.
Severely reduced kidney function.
Plan for end stage kidney disease.
End stage kidney failure