For many people, kidney disease doesn’t announce itself with pain or obvious symptoms. It shows up quietly, in lab work, long before the body starts to feel different. And yet, millions of patients are told everything is “fine” while their kidney function is already slipping.1
One number tells this story better than almost any other: your GFR score.1
If you or someone you love has high blood pressure, diabetes, heart disease, or a family history of kidney problems, there is a good chance your kidneys are under strain right now.1 The tragedy is that most people with early kidney disease don’t know they have it. By the time symptoms appear, damage is often advanced and harder to slow down.1
That’s why understanding your GFR score and asking for early referral to a kidney specialist isn’t overreacting. It’s prevention.1
What Your Kidneys Actually Do
Your kidneys are often described as filters, but that comparison barely captures how much work they do to keep you alive.2
Every minute, large volumes of blood pass through these two organs, and in that time your kidneys are not just removing waste. They are carefully balancing fluids, controlling levels of electrolytes like sodium and potassium, helping regulate blood pressure, and even signaling the body to make red blood cells and keep bones strong.2
When your kidneys are healthy, this work is invisible. You don’t feel it happening. But when kidney function starts to decline, the effects ripple across the entire body.2 Blood pressure becomes harder to control. Fluid begins to build up. Toxins that should be cleared stay in circulation. Over time, the heart, the brain, the bones, and the immune system all feel the strain.2
What makes kidney disease especially dangerous is that you can lose a significant amount of kidney function before you notice anything is wrong.2 By the time symptoms appear, damage is often already advanced. That’s why lab numbers, especially GFR, matter so much long before the body starts to protest.2
What GFR Means in Plain Language
GFR stands for glomerular filtration rate. It is an estimate of how well your kidneys are cleaning your blood.3
Most of the time, you’ll see it written as eGFR on your lab report. It’s calculated using a blood test (creatinine) along with factors like age and sex.3
Think of GFR like this:
- A higher number means your kidneys are filtering well.3
- A lower number means your kidneys are struggling.3
In general:
- A GFR above 90 is considered normal (if there are no other signs of kidney damage).3
- A GFR below 60 for three months or more usually means chronic kidney disease (CKD).3
- A GFR below 30 means serious kidney impairment and a much higher risk of complications.3
Here’s the critical part: you can lose more than half of your kidney function and still feel “okay.” That’s why lab numbers matter more than symptoms in the early stages.3
The Quiet Danger of “Watchful Waiting”
Many people first hear that something might be wrong with their kidneys in a vague, easy-to-dismiss way. “Your numbers are a little off.” “We’ll just keep an eye on it.” Sometimes this approach makes sense. But too often, it becomes a form of accidental neglect.4
Kidney disease is usually not a sudden event. It is a slow, progressive process, especially when driven by conditions like high blood pressure or diabetes. While the decline may be gradual, it is also relentless if nothing changes.4
Every year of untreated or undertreated kidney stress increases the risk of heart disease, stroke, anemia, bone disease, and eventually kidney failure.4 The real danger of watchful waiting is not that nothing is being done. It’s that precious time is being lost. Time when medications could be adjusted, blood pressure targets tightened, harmful drugs removed, or lifestyle and nutrition strategies put in place to slow the damage.4
Once kidney function drops far enough, the conversation shifts from protection to preparation. That is a much harder place to start.
Why Early Referral to a Kidney Specialist (Nephrologist) Matters
Seeing a kidney specialist, or a nephrologist, early does not mean you are close to dialysis. It means you are taking kidney disease seriously while there is still room to change its course.5
A nephrologist does more than read lab results. They look for patterns. They track how fast kidney function is changing, identify the underlying causes, and adjust treatment in ways that go far beyond what most primary care visits can cover in a short appointment.5
They also know which medications protect the kidneys, which ones quietly harm them, and how to manage the complicated balance between blood pressure, diabetes, heart disease, and kidney health.5
Studies have consistently shown that people who see a nephrologist earlier in the course of kidney disease tend to have better outcomes, fewer hospitalizations, and better preparation if advanced treatments are ever needed.5 Early specialist care is not about fear. It is about preserving options, slowing damage, and keeping control of your future for as long as possible.5
Why Black and Brown Communities are Hit Harder by Kidney Disease
Kidney disease does not affect all communities equally, and the reasons have far more to do with systems than with biology.6
Black Americans are significantly more likely to develop kidney failure than white Americans, and Latino and Indigenous communities also face higher rates of chronic kidney disease. This higher burden begins with higher exposure to risk factors like high blood pressure and diabetes, but it doesn’t end there.6
Long-term stress, environmental inequities, inconsistent access to preventive care, and delayed diagnosis all stack the odds against early treatment.6
Too often, people in these communities are referred to kidney specialists later, when the condition is already advanced and choices are fewer. Preventive care becomes crisis care. Planning becomes emergency response. By the time many people are told to see a nephrologist, dialysis is already on the horizon.6
This is why understanding your GFR and pushing for early referral is not just good personal health management. It is a matter of fairness. Everyone deserves the chance to protect their kidneys before the damage becomes irreversible.6
How to Ask About Your GFR and a Referral
You should not wait passively if you have high blood pressure, diabetes, heart disease, a family history of kidney disease, abnormal creatinine or urine protein tests, swelling in your legs, ankles, or face, or unexplained fatigue or changes in urination.3
Even if you feel “fine,” your labs may be telling a different story. Here’s what to actually say to your doctor:
You can be direct and simple:
“Can we review my GFR number together? I want to understand what stage my kidneys are in and whether this is stable or changing.”
If your GFR is below normal:
“At what point should I see a kidney specialist? Would an early referral help protect my kidneys?”
If you’ve been told to “wait and see”:
“What are we doing right now to slow progression? And how will we know if things are getting worse?”
You are not being difficult. You are being responsible.
The Bigger Picture
Kidney disease doesn’t have to automatically lead to dialysis or transplant. Many people live long, full lives with early or moderate kidney disease because it was caught early and treated seriously.
Your GFR score is not just a lab value. It’s a warning system and an opportunity. Too many people in our communities meet a kidney specialist for the first time in an emergency room. We deserve better than late-stage care.
In the NOWINCLUDED app, tell us: Have you ever looked up your GFR number? Has a doctor ever explained it to you clearly?
Your story might help someone else ask the question that protects their kidneys in time.
References
- Chen, T. K., Knicely, D. H., & Grams, M. E. (2020). Chronic Kidney Disease Diagnosis and Management. JAMA. doi:10.1001/jama.2019.14745
- NKF. (2024, October 15). Kidney Function. Retrieved from National Kidney Foundation: https://www.kidney.org/kidney-topics/kidney-function
- NKF. (2022, July 13). Estimated Glomerular Filtration Rate (eGFR). Retrieved from National Kidney Foundation: https://www.kidney.org/kidney-topics/estimated-glomerular-filtration-rate-egfr
- Liu, L., & Hu, Z. (2024). When to start renal replacement therapy in acute kidney injury: What are we waiting for? Journal of Intensive Medicine. doi:https://doi.org/10.1016/j.jointm.2023.12.005
- Suarez, J., Cohen, J. B., Potluri, V., Yang, W., & Kaplan, D. E. (2018). Racial Disparities in Nephrology Consultation and Disease Progression among Veterans with CKD: An Observational Cohort Study. Journal of the American Society of Nephrology. doi:10.1681/ASN.2018040344
- AKF. (2025, December 10). Understanding kidney disease risks: Race and ethnicity. Retrieved from American Kidney Fund: https://www.kidneyfund.org/all-about-kidneys/risk-factors/understanding-kidney-disease-risks-race-and-ethnicity
