Stage 4: Severely reduced — planning ahead

What it means

Stage 4 means kidney function is significantly reduced. The kidneys are working hard to keep up with waste, fluid, hormones, and electrolytes — and not always succeeding without help. This is the planning stage. Your care team will be doing everything possible to preserve what you have, while also walking you through the decisions that may come next, calmly and with time.

What’s happening in your body

At Stage 4 a number of changes often become noticeable for the first time:

• Uremic symptoms:persistent fatigue, nausea, lower appetite, a metallic taste, trouble concentrating (“brain fog”), itching, restless legs, muscle cramps.
• Fluid retention: swelling in ankles or legs, shortness of breath with exertion, unexpected weight changes from fluid.
• Electrolyte management gets harder: potassium can spike, phosphorus is harder to control, acidosis worsens.
• Anemia is common and often needs treatment.
• Blood pressure may be harder to control even on the same medications.

What your care team focuses on

• Symptom management.Anti-nausea options, treatments for itching, addressing sleep, treating anemia. These can transform how you’re feeling day-to-day.
• Aggressive cardiovascular protection. Heart disease is the biggest risk at Stage 4, more than the kidneys themselves.
• Transplant evaluation.If you’re a candidate, referral to a transplant center should happen now. The waitlist is long, and evaluation takes time. Living-donor work can also begin in parallel. A pre-emptive transplant — receiving a kidney before ever needing dialysis — is the best outcome we have for eligible patients.
• Dialysis access planning.If transplant isn’t imminent, we plan for access — an arteriovenous (AV) fistula in the arm (which needs 3–6 months to mature) or a peritoneal dialysis catheter in the abdomen. Placing the access does not mean starting dialysis tomorrow. It means being ready when, or if, the time comes.
• Modality education.We’ll walk you through every option — in-center hemodialysis, home hemodialysis, peritoneal dialysis — so you can make an informed choice that fits your life.
• Conservative kidney management. For some patients, particularly those with advanced age and multiple other health conditions, dialysis may not improve quality of life. Choosing to focus on maximum medical management without dialysis is a valid, dignified path. We will never push you in either direction — we will give you the information and the time.
• Dietary adjustments intensify. Potassium, phosphorus, sodium, fluid, and protein all need attention. Your renal dietitian will see you regularly.
• Medication review. Many medicines need dose reductions at Stage 4, and some should be stopped. Bring your full list — including over-the-counter products and supplements — to every visit.
• Advance care planning. Naming a health-care proxy, documenting your goals of care, and talking honestly with family about what matters to you. Better done in calm than in crisis.

Questions patients often ask

Stage 4 has more decisions in it than any earlier stage. None of them have to be made alone, and very few have to be made quickly. The honest message from your care team: there are real choices here, and we’ll make them together.