Chronic Kidney Disease Stage 3 ICD-10

Chronic Kidney Disease Stage 3 ICD-10 is a commonly searched medical term that combines a clinical diagnosis with its official coding classification. Chronic Kidney Disease (CKD) is a progressive condition in which the kidneys gradually lose their ability to filter waste and excess fluids from the blood. Stage 3 represents a moderate reduction in kidney function and is a critical phase where early treatment and lifestyle management can significantly slow disease progression.

Understanding the ICD-10 coding system is essential for healthcare providers, insurance companies, and medical billing professionals. ICD-10 stands for the International Classification of Diseases, 10th Revision, a globally recognized coding system developed by the World Health Organization. These codes are used to classify and document diseases accurately for medical records and insurance reimbursement.

What Is Chronic Kidney Disease Stage 3?

Chronic Kidney Disease is defined as a long-term condition in which kidney function declines over a period of months or years. Kidney function is typically measured using the Glomerular Filtration Rate (GFR), which estimates how well the kidneys are filtering blood.

Stage 3 CKD is divided into two sub-stages:

• Stage 3A: GFR between 45–59 mL/min/1.73 m²

• Stage 3B: GFR between 30–44 mL/min/1.73 m²

At this stage, kidney damage is moderate. Many patients may not experience severe symptoms, but laboratory tests will show decreased kidney function. If not managed properly, Stage 3 CKD can progress to Stage 4 or Stage 5, which may require dialysis or kidney transplantation.

ICD-10 Codes for Chronic Kidney Disease Stage 3

The ICD-10-CM coding system provides specific codes for Stage 3 CKD:

• N18.30 – Chronic kidney disease, stage 3 unspecified

• N18.31 – Chronic kidney disease, stage 3a

• N18.32 – Chronic kidney disease, stage 3b

These codes fall under category N18, which represents chronic kidney disease. Accurate coding ensures proper documentation, insurance claims processing, and treatment planning.

For example, if a patient’s GFR is 50, the appropriate ICD-10 code would be N18.31 (Stage 3A). If the GFR is 35, the correct code would be N18.32 (Stage 3B).

Symptoms of Stage 3 CKD

Many patients with Stage 3 CKD may not have noticeable symptoms. However, as kidney function declines, the following signs may appear:

• Fatigue and weakness

• Swelling in hands, feet, or ankles

• Changes in urination frequency

• Foamy or dark urine

• Muscle cramps

• High blood pressure

Because symptoms can be mild or absent, routine blood tests and urine tests are essential for early detection.

Causes of Chronic Kidney Disease Stage 3

The most common causes include:

1. Diabetes Mellitus – High blood sugar damages kidney filtering units.

2. Hypertension (High Blood Pressure) – Increased pressure damages blood vessels in the kidneys.

3. Recurrent kidney infections

4. Polycystic kidney disease

5. Autoimmune disorders

Diabetes and hypertension are responsible for the majority of CKD cases worldwide. Early control of blood sugar and blood pressure can significantly reduce the risk of progression.

Diagnosis and Monitoring

Diagnosis of Stage 3 CKD is based on:

• Estimated GFR (eGFR) blood test

• Serum creatinine levels

• Urine albumin-to-creatinine ratio (ACR)

• Imaging studies (if needed)

Doctors usually monitor kidney function every 3–6 months in Stage 3 patients. Monitoring helps detect worsening kidney function early and allows timely adjustments in treatment.

Treatment for Chronic Kidney Disease Stage 3

Although CKD cannot usually be reversed, its progression can be slowed with proper management.

1. Blood Pressure Control
Maintaining blood pressure below 130/80 mmHg is recommended. Doctors often prescribe ACE inhibitors or ARBs.

2. Blood Sugar Management
For diabetic patients, maintaining controlled HbA1c levels is crucial.

3. Diet Modifications

• Reduce salt intake

• Moderate protein consumption

• Limit processed foods

• Stay hydrated (as advised by doctor)

4. Lifestyle Changes

• Regular exercise

• Avoid smoking

• Limit alcohol

• Maintain healthy weight

5. Medication Review
Certain painkillers (NSAIDs) and contrast dyes can worsen kidney function. Always consult a doctor before taking new medications.

Importance of Accurate ICD-10 Coding

Using the correct ICD-10 code for Chronic Kidney Disease Stage 3 is important for several reasons:

• Proper medical documentation

• Insurance claim approval

• Tracking disease progression

• Healthcare data analysis

• Treatment planning

Incorrect coding may lead to claim denials or improper treatment documentation.

Complications of Stage 3 CKD

If left untreated, Stage 3 CKD can lead to:

• Anemia

• Bone disease (mineral imbalance)

• Cardiovascular disease

• Fluid retention

• Electrolyte imbalance

Cardiovascular complications are one of the leading causes of death in CKD patients. That is why early management is critical.

Prognosis and Outlook

Many people with Chronic Kidney Disease Stage 3 live normal lives with proper medical care and lifestyle adjustments. Early diagnosis, consistent monitoring, and following medical advice significantly improve long-term outcomes.

Stage 3 does not mean immediate kidney failure. With proper care, progression can be slowed for many years.

Conclusion

Chronic Kidney Disease Stage 3 ICD-10 refers to the moderate stage of kidney function decline along with its official diagnostic coding classification. The relevant ICD-10 codes include N18.30, N18.31, and N18.32, depending on whether the condition is unspecified, Stage 3A, or Stage 3B.

Early detection, proper treatment, and accurate coding are essential for effective disease management. If you or someone you know has been diagnosed with Stage 3 CKD, consult a healthcare professional for personalized treatment and regular monitoring.