N18.6 End stage renal disease

Name of the Condition

• End Stage Renal Disease

Summary

End Stage Renal Disease (ESRD) is the most advanced stage of chronic kidney disease, where kidney function is severely reduced or lost. The kidneys can no longer effectively filter waste products and excess fluids from the blood, requiring dialysis or kidney transplantation to sustain life. ESRD is irreversible and represents the final stage of kidney failure.

Causes

ESRD is typically the result of long-term damage to the kidneys from chronic conditions such as diabetes, high blood pressure, or glomerulonephritis. Other causes include polycystic kidney disease, recurrent kidney infections, or prolonged obstruction of the urinary tract. In some cases, the progression to ESRD may occur without a clear identifiable cause.

Risk Factors

• Uncontrolled diabetes or hypertension
• Family history of kidney disease
• Older age
• Ethnic background (African American, Hispanic, Asian, and Native American populations are at higher risk)
• Smoking and obesity
• Previous acute kidney injury
• Prolonged use of nephrotoxic medications

Symptoms

• Severe fatigue and weakness
• Persistent nausea, vomiting, or loss of appetite
• Significant swelling in the legs, feet, or ankles
• Changes in urination (e.g., reduced output or dark urine)
• Shortness of breath
• Persistent itching or dry skin
• Muscle cramps or twitching
• Difficulty concentrating or confusion

Diagnosis

Diagnosis of ESRD involves blood tests to measure creatinine and calculate the estimated Glomerular Filtration Rate (eGFR), which is typically below 15 mL/min/1.73m². Urine tests may show high levels of protein or blood. Imaging studies, such as ultrasounds, assess kidney size and structure. Additional tests, including electrolyte panels and arterial blood gases, evaluate the severity of metabolic imbalances.

Treatment Options

Treatment for ESRD focuses on replacing lost kidney function. Options include dialysis (hemodialysis or peritoneal dialysis) to filter blood, or kidney transplantation for eligible candidates. Medications manage symptoms like anemia, bone disease, and fluid retention. Dietary modifications, such as limiting sodium, potassium, and phosphorus, are also essential.

Prognosis and Follow-Up

Prognosis for ESRD depends on treatment adherence and overall health. With dialysis or transplantation, life expectancy can be extended, but complications may arise. Regular follow-up with a nephrologist is critical to monitor kidney function, adjust treatments, and address comorbidities like cardiovascular disease.

Complications

• Cardiovascular disease (e.g., heart attack, stroke)
• Anemia due to reduced erythropoietin production
• Bone disease (renal osteodystrophy)
• Electrolyte imbalances (e.g., high potassium)
• Fluid overload leading to edema or heart failure
• Increased infection risk
• Malnutrition or weight loss

Lifestyle & Prevention

• Manage underlying conditions like diabetes or hypertension to slow kidney damage.
• Avoid nephrotoxic substances, including certain medications and contrast dyes.
• Maintain a balanced diet low in sodium, potassium, and phosphorus.
• Stay hydrated, but consult a provider for fluid restrictions.
• Quit smoking and limit alcohol use.
• Engage in regular, moderate exercise as tolerated.

When to Seek Professional Help

Seek immediate medical attention if you experience severe symptoms like chest pain, difficulty breathing, or sudden swelling, as these may indicate life-threatening complications. Contact a healthcare provider for persistent fatigue, unexplained weight loss, or changes in urination, as these could signal worsening kidney function.

Tips for Medical Coders

Document the underlying cause of ESRD (e.g., diabetes, hypertension) when available, as it may impact coding for related conditions. Ensure documentation supports the stage of kidney disease and any treatments (e.g., dialysis, transplant) to justify the ESRD code. Note the date of diagnosis and any comorbidities for accurate coding and reporting.