The phrase “mildly decreased kidney function” is commonly used when the estimated glomerular filtration rate (eGFR) is in the range of 60 to 89 mL/min/1.73 m².

This range is classified as G2, or mildly decreased GFR, in the KDIGO kidney-function classification. However, an eGFR between 60 and 89 does not automatically mean that a person has chronic kidney disease (CKD). Evidence of kidney damage is also required for a diagnosis of CKD when eGFR is in this range.

Therefore, seeing an eGFR such as 72, 78 or 85 on a laboratory report should not immediately be interpreted as kidney failure or serious kidney disease.

The result needs to be considered alongside urine findings, previous kidney-function measurements, medical history and other risk factors.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized assessment of abnormal kidney-function results and kidney disease.

What Is eGFR and Why Is It Used?

The estimated glomerular filtration rate is an estimate of how effectively the kidneys filter blood.

It is usually calculated from laboratory measurements such as serum creatinine together with demographic information used by the relevant equation.

An eGFR is useful because creatinine alone does not provide a complete picture of kidney filtration.

For example, creatinine can be influenced by factors including muscle mass and other individual characteristics.

Doctors therefore generally interpret eGFR as part of a broader kidney assessment rather than treating one number as a diagnosis.

Is an eGFR of 60 to 89 Always Kidney Disease?

No.

This is one of the most important points to understand.

According to the current CKD classification, G2 represents an eGFR of 60–89, described as mildly decreased relative to young-adult levels. But G1 and G2 do not fulfill the criteria for CKD unless there is evidence of kidney damage.

Evidence of kidney damage can include findings such as:

• Persistent albuminuria

• Protein in urine

• Certain abnormalities on urine testing

• Persistent blood in urine in an appropriate clinical setting

• Structural abnormalities on imaging

• Some specific kidney diseases

The abnormality also needs to meet the appropriate criteria for chronicity, generally involving persistence for at least three months.

Mildly Decreased Kidney Function vs Stage 2 CKD

These terms are related but should not be treated as identical.

Mildly decreased kidney function may simply describe an eGFR between 60 and 89.

Stage G2 CKD requires an eGFR in that range plus evidence of kidney damage that has persisted for at least three months. The National Kidney Foundation specifically notes that an eGFR of 60–89 alone is insufficient to diagnose stage G2 CKD.

This distinction prevents unnecessary alarm when a person receives a mildly reduced eGFR result.

What Can Cause Mildly Reduced Kidney Function?

A mildly reduced eGFR can have different explanations.

Possible contributors include:

Early Chronic Kidney Disease

Some people have early kidney disease associated with diabetes, hypertension, glomerular disease, inherited conditions or other kidney disorders.

Aging

eGFR tends to decline with age, and an isolated mildly lower result in an older adult does not automatically establish CKD.

Diabetes

Long-standing diabetes can damage the kidney's filtering structures and may lead to albumin appearing in urine.

High Blood Pressure

Persistent hypertension can damage kidney blood vessels and is an important risk factor for CKD.

Previous Acute Kidney Injury

Some people may have reduced kidney function after an episode of acute kidney injury.

Kidney Stones or Obstruction

Repeated obstruction or certain complicated stone conditions can affect kidney function.

Glomerular or Other Kidney Diseases

Some diseases affecting the kidney's filtering units may produce reduced filtration, proteinuria or blood in the urine.

Temporary Changes

Kidney function measurements can change during dehydration, acute illness or other circumstances.

A single abnormal test therefore should not automatically be considered permanent kidney damage.

What Symptoms Occur With Mildly Decreased Kidney Function?

Many people with mildly decreased kidney function have no obvious symptoms.

This is particularly true when kidney function is only mildly reduced.

If symptoms occur, they may be related to the underlying kidney condition rather than the eGFR number itself.

Possible findings can include:

• Foamy urine

• Blood in urine

• High blood pressure

• Swelling

• Changes in urine output

• Recurrent urinary problems

Stage G2 CKD is commonly asymptomatic, according to the National Kidney Foundation.

This is why urine testing and appropriate monitoring can be important even when a person feels completely well.

Why Urine Albumin Matters

A mildly reduced eGFR should not be interpreted by itself.

One of the most useful additional measurements is the urine albumin-to-creatinine ratio (UACR).

Albumin in the urine can indicate damage to the kidney's filtering barrier.

KDIGO classifies albuminuria into:

Albuminuria category	UACR
A1 – Normal to mildly increased	<30 mg/g
A2 – Moderately increased	30–299 mg/g
A3 – Severely increased	≥300 mg/g

Higher persistent albuminuria is associated with greater kidney and cardiovascular risk.

This means that two people with the same eGFR may have different risk profiles depending on their urine albumin level and underlying kidney condition.

What Tests Are Done for Mildly Decreased Kidney Function?

A nephrologist may consider several pieces of information rather than repeating creatinine alone.

Serum Creatinine and eGFR

These provide information about estimated filtration.

Urine Albumin Testing

A UACR can identify albumin loss that may not be obvious from symptoms.

Urinalysis

Urine testing may detect:

• Blood

• Protein

• Infection

• Other abnormalities

Blood Pressure

Blood pressure is important because hypertension can contribute to kidney damage and can also develop as kidney disease progresses.

Blood Tests

Depending on the situation, testing may include:

• Potassium

• Sodium

• Bicarbonate

• Hemoglobin

• Blood glucose

• HbA1c in people with diabetes

• Other tests based on the suspected cause

Kidney Imaging

Ultrasound or other imaging may be recommended if the doctor suspects:

• Stones

• Obstruction

• Structural abnormalities

• Cysts

• Other kidney conditions

Why Is Repeating the Kidney Function Test Sometimes Important?

One eGFR value gives only a snapshot.

Doctors may compare previous results to determine whether kidney function is:

• Stable

• Improving

• Gradually declining

• Changing because of an acute illness

A persistent abnormality provides more useful information than an isolated result.

If an eGFR falls unexpectedly, the doctor may first investigate potentially reversible factors rather than assuming that permanent CKD has suddenly developed.

Can Mildly Decreased Kidney Function Return to Normal?

Sometimes.

The answer depends on why the eGFR is reduced.

If the change is related to a reversible factor, kidney function may improve after that factor is corrected.

For example, an acute illness or dehydration can temporarily affect kidney function.

However, established chronic kidney damage may not completely reverse.

The key question is therefore not simply “How can I increase my eGFR?” but rather:

“Why is my kidney function reduced?”

Identifying the cause provides a more useful basis for treatment.

Does Mildly Decreased Kidney Function Mean Kidney Failure?

No.

An eGFR of 60–89 is far above the G5 kidney-failure range.

Current CKD classification describes:

• G1: ≥90

• G2: 60–89

• G3a: 45–59

• G3b: 30–44

• G4: 15–29

• G5: <15, kidney failure range

Even these categories should be interpreted together with the underlying cause and albuminuria.

Therefore, a mildly reduced eGFR should not be described as kidney failure.

What Can Make Kidney Function Decline Further?

If genuine CKD is present, several factors may contribute to progression.

These can include:

• Poorly controlled blood pressure

• Poorly controlled diabetes

• Significant persistent albuminuria

• Smoking

• Recurrent acute kidney injury

• Unnecessary use of kidney-harming medicines

• Persistent urinary obstruction

• Certain untreated kidney diseases

Not every risk factor applies to every patient.

A personalized assessment helps determine which factors need attention.

How Can You Protect Mildly Reduced Kidney Function?

Kidney protection depends on the underlying cause.

Useful measures may include:

Keep Blood Pressure Controlled

Follow the blood-pressure target recommended for your individual condition.

Manage Diabetes

If you have diabetes, appropriate glucose management can reduce the risk of kidney complications.

Avoid Unnecessary NSAIDs

Some nonsteroidal anti-inflammatory drugs can affect kidney function, particularly in susceptible patients.

Discuss frequent painkiller use with your doctor or pharmacist.

Reduce Excess Sodium

Excess dietary sodium can contribute to high blood pressure and fluid retention.

Avoid Smoking

Smoking increases cardiovascular risk and can negatively affect overall kidney health.

Maintain a Healthy Lifestyle

Appropriate physical activity, nutrition and weight management can support cardiovascular and metabolic health.

Do Not Overuse Supplements

Herbal products and supplements are not automatically kidney-safe.

Discuss regular supplement use with your healthcare professional.

Is There a Medicine to Improve Mildly Decreased Kidney Function?

There is no universal medicine that simply increases eGFR in everyone.

Treatment is directed at the underlying cause and the person's risk profile.

Depending on the diagnosis, doctors may use treatments to:

• Control blood pressure

• Reduce albuminuria

• Manage diabetes

• Protect cardiovascular health

• Treat a specific kidney disease

• Prevent or slow further kidney damage

The appropriate medicine depends on kidney function, potassium levels, albuminuria, diabetes status, blood pressure and other factors.

Do not start a kidney medicine solely because an eGFR result is mildly reduced.

What If You Have Diabetes and Mildly Reduced Kidney Function?

Diabetes deserves particular attention because it can affect both kidney filtration and urine albumin levels.

A person with diabetes may need monitoring of:

• eGFR

• UACR

• Blood glucose

• HbA1c

• Blood pressure

• Cardiovascular risk

Depending on the individual's diagnosis and kidney function, kidney-protective diabetes therapies may be considered by the treating physician.

Treatment should be individualized rather than based on eGFR alone.

What If You Have High Blood Pressure?

High blood pressure is both a cause and a consequence of kidney disease.

If kidney function is mildly decreased, blood-pressure management may be an important part of protecting long-term kidney health.

The appropriate medication depends on factors such as:

• Blood pressure level

• Albuminuria

• Potassium

• Kidney function

• Other cardiovascular conditions

Medication should be selected and adjusted by a healthcare professional.

Can Diet Improve Mildly Decreased Kidney Function?

There is no single “kidney diet” suitable for everyone with a mildly reduced eGFR.

Dietary recommendations may depend on:

• Kidney function

• Albuminuria

• Blood pressure

• Diabetes

• Potassium

• Phosphorus

• Body weight

• Overall nutritional needs

In many cases, avoiding excessive sodium and maintaining a balanced diet are useful components of kidney care.

Extreme protein restriction, fasting or restrictive “kidney detox” diets should not be started without professional guidance.

Does Mildly Decreased Kidney Function Need a Nephrologist?

Not every person with an eGFR of 60–89 needs specialist care.

However, nephrology assessment may be appropriate when there is:

• Persistent decline in eGFR

• Significant albuminuria

• Blood in urine

• Difficult-to-control hypertension

• Recurrent kidney stones

• Abnormal kidney imaging

• Suspected glomerular disease

• Previous significant acute kidney injury

• A family history of important kidney disease

The decision depends on the complete clinical picture.

When Should Mildly Decreased Kidney Function Be Taken More Seriously?

A mildly reduced eGFR deserves closer evaluation when it is accompanied by other abnormalities.

Examples include:

• Rising creatinine over time

• Increasing urine albumin

• Persistent proteinuria

• Blood in urine

• High blood pressure

• Swelling

• Recurrent kidney stones

• Reduced urine output

• Abnormal kidney imaging

• Diabetes or significant cardiovascular disease

The combination of kidney-function measurements, urine findings and clinical history provides a clearer picture of risk.

Can Mildly Decreased Kidney Function Stay Stable?

Yes.

Some people with mildly decreased kidney function remain stable for long periods, particularly when there is no significant kidney damage or when the underlying risk factors are appropriately managed.

However, stability cannot be assumed from a single eGFR measurement.

Regular monitoring may help identify meaningful changes early.

Mildly Decreased Kidney Function at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized assessment for patients with abnormal kidney-function results.

Depending on the patient's situation, evaluation may include:

• Review of creatinine and eGFR trends

• Urine albumin and protein assessment

• Blood-pressure evaluation

• Diabetes-related kidney assessment

• Medication review

• Electrolyte testing

• Kidney ultrasound or other imaging when appropriate

• Evaluation of kidney stones or urinary obstruction

• Assessment of possible CKD causes

• Long-term kidney-function monitoring

The objective is to determine whether the mildly reduced kidney function represents a temporary change, early kidney disease or another clinical situation requiring follow-up.

Frequently Asked Questions

What does mildly decreased kidney function mean?

It generally refers to an eGFR of 60–89 mL/min/1.73 m², classified as G2 or mildly decreased. An eGFR in this range alone does not establish CKD; evidence of kidney damage is also required.

Is an eGFR of 60 to 89 dangerous?

Not necessarily. The significance depends on whether there is kidney damage, albuminuria, an underlying kidney disease, a declining trend or other health conditions.

Is mildly decreased kidney function the same as stage 2 kidney disease?

Not exactly. Stage G2 CKD requires an eGFR of 60–89 plus evidence of kidney damage persisting for at least three months.

Can an eGFR of 70 be normal?

An eGFR of 70 is within the G2 range, but whether it represents CKD depends on age, previous results and evidence of kidney damage. An eGFR of 60–89 alone does not diagnose CKD.

Can mildly decreased kidney function improve?

It can improve when the reduction is related to a reversible cause. Established chronic kidney damage may not completely reverse.

Does mildly decreased kidney function require dialysis?

No. Mildly decreased kidney function does not mean that dialysis is required. Dialysis is associated with kidney failure and specific clinical indications, not an isolated eGFR in the 60–89 range.

What test is most important after finding a mildly reduced eGFR?

The next evaluation commonly includes repeat kidney-function assessment when appropriate, urinalysis and urine albumin testing, along with blood pressure and assessment of the underlying cause.

Should I drink extra water to improve kidney function?

Not automatically. Fluid needs depend on the individual's health and kidney condition. Excessive water intake is not a proven treatment for mildly reduced kidney function.

Conclusion

Mildly decreased kidney function does not automatically mean chronic kidney disease or kidney failure. An eGFR of 60–89 is categorized as mildly decreased, but G2 CKD requires additional evidence of kidney damage that persists over time.

Understanding the reason behind the result is more important than trying to increase the eGFR number on its own. Urine albumin, blood pressure, creatinine trends, medical history and other investigations can help determine whether the finding represents early kidney disease, a temporary change or an individual's expected level of kidney function.

Appropriate monitoring, treatment of conditions such as diabetes or hypertension, avoidance of unnecessary kidney-harming medicines and individualized lifestyle measures can help support kidney health.

If your laboratory report shows mildly decreased kidney function or your eGFR is falling over time, specialist assessment can help clarify what the result means and whether follow-up or treatment is needed.

For individualized kidney-function evaluation and nephrology 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. An eGFR of 60–89 mL/min/1.73 m² does not by itself establish chronic kidney disease, and interpretation depends on age, kidney-damage markers, albuminuria, previous results, medical history and other clinical factors. Do not start, stop or change prescription medicines, supplements, fluid intake or diet based solely on this article. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for personalized evaluation. Seek prompt medical attention for markedly reduced urine output, severe breathlessness, chest pain, confusion, rapidly worsening swelling or sudden deterioration in health.