N18.3 Chronic kidney disease, stage 3 (moderate)

Name of the Condition

• Chronic Kidney Disease, Stage 3 (Moderate)
• Also known as CKD Stage 3

Summary

Chronic Kidney Disease (CKD) Stage 3 is a moderate decline in kidney function, where the kidneys filter waste less effectively than normal. This stage is part of a progressive condition that may develop over months or years. While kidney function is impaired, many patients remain asymptomatic or experience mild symptoms.

Causes

CKD is often caused by long-term conditions that damage the kidneys, such as diabetes and high blood pressure. Other causes include glomerulonephritis, polycystic kidney disease, recurrent kidney infections, or obstructive uropathy. In some cases, the exact cause may not be identifiable.

Risk Factors

• Advanced age
• Family history of kidney disease
• Uncontrolled diabetes or hypertension
• Obesity
• Smoking
• Cardiovascular disease
• Previous acute kidney injury

Symptoms

Patients may experience fatigue, swelling in hands or feet, changes in urination patterns, and high blood pressure. Some individuals may have no noticeable symptoms at this stage.

Diagnosis

CKD Stage 3 is diagnosed using blood tests to measure creatinine and calculate estimated Glomerular Filtration Rate (eGFR), which assesses kidney function. Urine tests check for albumin or protein, and imaging studies like ultrasounds may evaluate kidney structure.

Treatment Options

• Medications to control blood pressure and blood sugar
• Diet modifications to reduce protein, salt, and potassium intake
• Lifestyle changes such as weight management and smoking cessation
• Regular monitoring of kidney function and complications

Prognosis and Follow-Up

Prognosis depends on underlying causes, comorbidities, and adherence to treatment. Regular follow-up with a healthcare provider is essential to manage progression and complications. Lifestyle modifications and medication adherence can help slow disease advancement.

Complications

• Increased risk of cardiovascular disease
• Anemia
• Bone disease (mineral and bone disorder)
• Fluid retention
• Electrolyte imbalances

Lifestyle & Prevention

• Maintain a balanced diet low in sodium and protein
• Exercise regularly and maintain a healthy weight
• Avoid smoking and limit alcohol intake
• Manage blood pressure and blood sugar levels
• Stay hydrated and avoid nephrotoxic medications

When to Seek Professional Help

Seek medical attention if you experience persistent fatigue, swelling, changes in urination, or uncontrolled blood pressure. Regular check-ups are recommended for those with risk factors or early-stage CKD.

Tips for Medical Coders

Document the stage of CKD clearly in the medical record, as it is essential for accurate coding. Ensure the diagnosis is supported by eGFR values or other clinical criteria. Review documentation for comorbidities or complications that may impact coding specificity.