The kidneys continuously filter the blood, regulate fluid and electrolyte balance, help control blood pressure and perform several other important functions.

When kidney damage or reduced kidney function persists over time, it may be classified as chronic kidney disease (CKD). The severity of CKD is assessed primarily using estimated glomerular filtration rate, or eGFR, together with the cause of kidney disease and the amount of albumin in the urine.

People often search for chronic kidney failure stages when a blood report shows a reduced eGFR. It is important to understand that CKD has several stages, but not every stage means that the kidneys have failed.

The later stages represent progressively reduced kidney function, with G5 corresponding to kidney failure.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation and long-term management for patients with chronic kidney disease and advanced kidney failure.

How Are Chronic Kidney Disease Stages Determined?

Current kidney-disease classification uses three major components:

Cause + GFR category + Albuminuria category

This approach is often abbreviated as CGA classification.

The eGFR categories are:

Category	eGFR (mL/min/1.73 m²)	General meaning
G1	≥90	Normal or high
G2	60–89	Mildly decreased
G3a	45–59	Mildly to moderately decreased
G3b	30–44	Moderately to severely decreased
G4	15–29	Severely decreased
G5	<15	Kidney failure

An important point is that an eGFR of 60–89 by itself does not necessarily mean CKD. For G1 and G2, there needs to be another marker of kidney damage that persists for at least three months.

Stage 1 Kidney Disease: Early Kidney Damage

eGFR: 90 or higher

Stage 1, corresponding to G1, means kidney filtration is in the normal or high range but there is another indication of kidney damage.

Possible markers include:

• Persistent albumin in urine

• Certain urine abnormalities

• Structural abnormalities on imaging

• Some inherited or other established kidney disorders

Many people have no symptoms at this stage.

The objective is to identify the underlying cause and reduce the risk of further kidney damage.

Management may include:

• Blood-pressure control

• Diabetes management

• Treatment of the underlying kidney condition

• Monitoring urine albumin

• Avoiding unnecessary kidney-harming medicines

• Regular kidney-function assessment

Stage 2 Kidney Disease: Mild Reduction in Kidney Function

eGFR: 60–89

At G2, eGFR is mildly decreased.

However, as with G1, an eGFR between 60 and 89 does not automatically establish CKD. Evidence of kidney damage persisting for at least three months is also required.

Symptoms may still be absent.

Doctors may monitor:

• eGFR

• Serum creatinine

• Urine albumin

• Blood pressure

• Blood glucose

• Other relevant tests

Early identification provides an opportunity to address conditions such as diabetes, hypertension and significant albuminuria.

Stage 3 Kidney Disease: Moderate Reduction in Kidney Function

Stage 3 is divided into two categories.

Stage 3a

eGFR: 45–59

Stage 3b

eGFR: 30–44

The distinction between 3a and 3b is useful because lower kidney function is generally associated with increasing risk of complications and progression.

Depending on the individual, complications may include:

• Anemia

• Mineral and bone abnormalities

• Electrolyte disturbances

• Blood-pressure problems

• Fluid retention

• Increasing fatigue

However, symptoms vary considerably.

Stage 3 does not automatically mean dialysis is required.

Treatment focuses on identifying the cause, reducing modifiable risks and monitoring for complications.

Stage 4 Kidney Disease: Severe Reduction in Kidney Function

eGFR: 15–29

G4 represents a severe reduction in kidney filtration.

Some people may develop more noticeable symptoms at this stage, such as:

• Fatigue

• Swelling

• Changes in appetite

• Nausea

• Itching

• Changes in urination

• Muscle cramps

• Breathlessness

• Sleep problems

Not everyone experiences these symptoms.

Stage 4 is also an important point for kidney replacement therapy planning.

A nephrologist may discuss:

• Hemodialysis

• Peritoneal dialysis

• Kidney transplantation

• Conservative kidney management when appropriate

Planning ahead does not mean dialysis has to start immediately.

Stage 5 Kidney Disease: Kidney Failure

eGFR: Less than 15

G5 represents the kidney failure range.

At this level, the kidneys may no longer adequately perform their filtration and regulatory functions.

Possible complications include:

• Fluid overload

• High potassium

• Metabolic acidosis

• Anemia

• Mineral and bone abnormalities

• Poor appetite

• Nausea

• Severe fatigue

• Itching

• Difficulty concentrating

• Breathlessness

• Uremic symptoms

However, treatment decisions are not based on eGFR alone.

Some patients may require dialysis or another form of kidney replacement therapy, while others may be managed according to symptoms, complications, overall health and treatment goals.

What Is the Difference Between CKD Stages and Kidney Failure?

This distinction is important.

CKD includes a broad range of kidney disease severity.

A person can have early CKD with relatively preserved kidney function and no symptoms.

Kidney failure refers to the most advanced level of loss of kidney function, generally corresponding to G5.

Therefore, saying that someone has “kidney disease” does not necessarily mean that the kidneys have failed.

Similarly, a diagnosis of stage 4 CKD means kidney function is severely reduced, but it does not automatically mean that dialysis must begin.

Why Creatinine Alone Cannot Determine the CKD Stage

Many patients focus on their creatinine number when reading a kidney report.

However, CKD staging is generally based on eGFR rather than serum creatinine alone.

Creatinine can be influenced by factors including:

• Muscle mass

• Age

• Diet

• Certain medicines

• Hydration

• Acute illness

eGFR uses creatinine and other patient information to estimate filtration. Modern adult eGFR equations include race-free CKD-EPI equations.

The doctor should interpret the result in the context of the patient's overall health.

Why Urine Albumin Matters in Chronic Kidney Disease

Two people with the same eGFR may have different risks.

One reason is albuminuria.

Albumin in the urine can indicate damage to the kidney's filtering system. Persistent albuminuria is also associated with greater risk of kidney disease progression and cardiovascular complications.

Albuminuria is commonly classified as:

• A1: less than 30 mg/g

• A2: 30–300 mg/g

• A3: more than 300 mg/g

Therefore, kidney risk assessment should consider both eGFR and urine albumin rather than looking at the stage number alone.

What Causes Chronic Kidney Failure?

Several conditions can contribute to long-term kidney damage.

Common causes include:

Diabetes

Long-standing diabetes can damage kidney blood vessels and filtering structures.

High Blood Pressure

Persistent hypertension can damage the kidneys, while CKD can also contribute to high blood pressure.

Glomerular Diseases

Conditions affecting the kidney's filtering units can cause proteinuria, blood in urine and progressive loss of kidney function.

Inherited Kidney Disorders

Conditions such as polycystic kidney disease can gradually impair kidney function.

Recurrent Obstruction

Repeated urinary obstruction from stones or other causes may damage the kidneys.

Autoimmune and Other Diseases

Various autoimmune, vascular, infectious and medication-related conditions can also contribute to CKD.

Finding the cause is important because treatment differs between conditions.

Can Chronic Kidney Disease Progress From One Stage to Another?

It can, but progression is not inevitable.

Some people remain stable for many years, while others experience a faster decline.

Factors associated with greater risk of progression include:

• Increasing albuminuria

• Poorly controlled blood pressure

• Diabetes

• Declining eGFR

• Recurrent acute kidney injury

• Certain underlying kidney diseases

• Smoking

• Some medication-related kidney injuries

Monitoring eGFR and urine albumin over time can help identify changes in kidney status.

Can Chronic Kidney Disease Be Stopped From Getting Worse?

There is no universal treatment that completely stops CKD in every patient.

However, appropriate management can address important modifiable risks.

Depending on the cause, treatment may include:

• Blood-pressure management

• Diabetes control

• Reduction of significant albuminuria when appropriate

• Kidney-protective medicines for suitable patients

• Management of cardiovascular risk

• Treatment of specific kidney diseases

• Appropriate dietary changes

• Avoidance of unnecessary nephrotoxic medicines

• Regular monitoring

The treatment plan should be individualized according to kidney function and the underlying disease.

What Symptoms Can Occur in Advanced CKD?

Early CKD may produce few or no obvious symptoms.

As kidney function becomes more severely impaired, some patients may develop:

• Swelling of the feet or legs

• Changes in urine output

• Foamy urine

• Fatigue

• Nausea

• Poor appetite

• Itching

• Muscle cramps

• Sleep disturbance

• Breathlessness

• Difficulty concentrating

Symptoms are not a reliable substitute for kidney-function testing.

A person can have significant CKD without feeling seriously unwell.

What Tests Are Used to Monitor Chronic Kidney Failure Stages?

A nephrologist may use several measurements to follow kidney health.

Blood Tests

These can include:

• Serum creatinine

• eGFR

• Urea

• Potassium

• Sodium

• Bicarbonate

• Hemoglobin

• Calcium

• Phosphorus

Urine Testing

Depending on the condition:

• Urinalysis

• Urine albumin-to-creatinine ratio

• Protein measurement

• Other urine investigations

Blood Pressure

Blood pressure should be monitored because hypertension can both contribute to and result from kidney disease.

Imaging

Ultrasound or other imaging may be required to investigate kidney size, obstruction, cysts, stones or structural abnormalities.

Additional Testing

Depending on the suspected cause, the doctor may recommend autoimmune testing, genetic testing, kidney biopsy or other specialized investigations.

When Does Dialysis Become Necessary?

Dialysis is a form of kidney replacement therapy.

However, dialysis is not started simply because someone reaches a particular creatinine number or because an eGFR is below a specific threshold alone.

Doctors consider the entire clinical situation, including:

• Symptoms caused by kidney failure

• Fluid overload

• Persistent dangerous electrolyte abnormalities

• Severe acid-base disturbances

• Uremic complications

• Overall kidney function

• Response to medical treatment

• Nutritional and functional status

• Patient preferences and treatment goals

When kidney failure develops, treatment options can include hemodialysis, peritoneal dialysis or kidney transplantation.

Can Kidney Failure Be Treated Without Dialysis?

In selected situations, complications can be managed without immediate dialysis.

The approach depends on:

• Severity of kidney dysfunction

• Symptoms

• Electrolytes

• Fluid status

• Acid-base balance

• Overall health

• Underlying kidney disease

Some people with advanced CKD may also choose conservative kidney management, particularly when dialysis may not align with their health status or treatment goals.

This decision should be made through detailed discussion with a nephrologist.

What Happens When Kidney Failure Becomes Advanced?

When kidney function becomes very low, patients and families may need to discuss long-term kidney replacement options.

Hemodialysis

Blood is filtered through a dialysis machine.

Peritoneal Dialysis

The lining of the abdomen is used as a filtering membrane with dialysis fluid.

Kidney Transplantation

A functioning donor kidney can provide filtration for appropriately selected patients with kidney failure.

Conservative Kidney Management

Some patients may choose comprehensive non-dialysis care focused on symptom control and quality of life.

The appropriate option varies from person to person.

Can Someone Live for Years With Chronic Kidney Disease?

Yes, depending on the cause and severity.

CKD does not automatically progress rapidly to kidney failure.

Long-term outlook is influenced by:

• CKD stage

• eGFR trend

• Albuminuria

• Underlying cause

• Age

• Diabetes

• Blood pressure

• Cardiovascular health

• Other medical conditions

Regular monitoring is important because treatment can be adjusted when kidney function or risk factors change.

Lifestyle Habits That Support Kidney Health

Lifestyle changes should complement—not replace—medical treatment.

Control Blood Pressure

Follow the blood-pressure target recommended by your healthcare professional.

Manage Diabetes

Good diabetes management can reduce the risk of kidney complications.

Limit Excess Sodium

Reducing excessive salt can support blood-pressure and fluid management.

Maintain Appropriate Physical Activity

Regular physical activity can support cardiovascular health when medically appropriate.

Avoid Smoking

Smoking increases cardiovascular and overall health risks.

Avoid Unnecessary Painkillers

Some NSAIDs can affect kidney function, particularly in people who already have CKD or are dehydrated.

Follow an Individualized Kidney Diet

Protein, potassium, phosphorus, sodium and fluid requirements vary according to CKD stage and other health conditions.

Avoid extreme diets without professional guidance.

When Should You See a Nephrologist?

Specialist kidney evaluation is appropriate when there is:

• Persistently reduced eGFR

• Significant protein or albumin in urine

• Rapid decline in kidney function

• Persistent blood in urine

• Difficult-to-control blood pressure

• Recurrent kidney stones or urinary obstruction

• Suspected glomerular disease

• Advanced CKD

• Kidney failure

• Complications involving potassium, acid-base balance or fluid retention

Early specialist assessment can help identify the cause and establish a treatment and monitoring strategy.

Chronic Kidney Failure Stage Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation and management for chronic kidney disease.

Depending on the patient's condition, care may include:

• CKD stage assessment

• Creatinine and eGFR monitoring

• Urine albumin and protein evaluation

• Blood-pressure management

• Diabetes-related kidney care

• Investigation of the underlying kidney disease

• Management of CKD complications

• Medication review

• Dialysis planning

• Hemodialysis and peritoneal dialysis-related care

• Kidney transplant-related evaluation

Treatment is tailored to the patient's kidney function, disease cause, laboratory findings and overall health.

Frequently Asked Questions

What are the chronic kidney failure stages?

CKD is classified into G1 through G5 based on eGFR, with G1 representing normal or high eGFR and G5 representing kidney failure. G3 is further divided into G3a and G3b. Albuminuria and the underlying cause are also important for risk assessment.

Which stage of kidney disease is considered kidney failure?

G5, with an eGFR below 15 mL/min/1.73 m², is classified as the kidney failure category.

Does stage 4 kidney disease mean dialysis is needed?

No. Stage 4 represents severely reduced kidney function, but dialysis is not automatically required. Symptoms, complications and the overall clinical condition determine when kidney replacement therapy is appropriate.

Does stage 5 kidney disease always require dialysis?

Not necessarily immediately. Some patients may be managed without immediate dialysis depending on symptoms, complications, kidney function and treatment goals. However, many people with kidney failure eventually require kidney replacement therapy.

Can stage 1 or stage 2 CKD cause symptoms?

Often there are few or no symptoms in early CKD. Testing may detect kidney disease before a person feels unwell.

Is creatinine enough to determine the kidney disease stage?

No. eGFR is used to categorize kidney function, while urine albumin, the underlying cause and other clinical information provide additional risk information.

Can CKD move backward to an earlier stage?

A temporary decline in kidney function caused by an acute illness may improve. However, established chronic kidney damage does not simply reverse in every patient. Changes in eGFR should be interpreted over time by a healthcare professional.

Does everyone with CKD develop kidney failure?

No. Some people remain stable for many years, while others experience progression. Risk depends on factors such as cause, eGFR trend, albuminuria, diabetes and blood-pressure control.

Conclusion

Understanding chronic kidney failure stages helps patients interpret changes in kidney function, but a stage number should never be considered in isolation.

Current CKD classification uses eGFR categories from G1 to G5, with G5 representing kidney failure. Albuminuria, the underlying cause of CKD and the trend in kidney function provide additional information about risk.

Early-stage CKD may have few symptoms, while advanced disease can lead to fluid retention, electrolyte abnormalities, anemia, itching, nausea, fatigue and other complications.

CKD does not inevitably progress to kidney failure. Identifying the cause, controlling blood pressure and diabetes, managing albuminuria when appropriate, avoiding unnecessary kidney injury and maintaining regular follow-up can help protect remaining kidney function.

When kidney failure becomes advanced, treatment options may include hemodialysis, peritoneal dialysis, kidney transplantation or conservative kidney management, depending on the patient's medical condition and preferences.

For personalized CKD staging, monitoring and specialist kidney care, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and should not be considered a substitute for medical diagnosis, treatment or individualized medical advice. Chronic kidney disease stages are determined primarily by eGFR together with evidence of kidney damage, albuminuria and the underlying cause. An isolated creatinine or eGFR result should not be used to determine an individual's prognosis or need for dialysis. Do not start, stop or change medicines, supplements, diet, fluid intake or dialysis treatment based solely on this article. Seek urgent medical attention for severe breathlessness, chest pain, confusion, very little or no urine, severe swelling, persistent vomiting or rapidly worsening symptoms. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for individualized evaluation and treatment.