Chronic kidney disease

CKD Stages Explained: How eGFR and Urine Albumin Fit Together

CKD stages describe estimated kidney filtering, but urine albumin and other health factors help clinicians understand risk and next steps.

6 min read Published 2026-06-28 Reviewed by The Kidney Experts nephrology team

Key takeaways

  • CKD staging commonly uses eGFR categories from G1 through G5.
  • Albuminuria categories add important risk information because urine protein can matter even when eGFR is higher.
  • Stages guide conversations; they do not replace individualized clinical judgment.

What CKD stages are for

Chronic kidney disease, or CKD, means the kidneys have had reduced function or signs of kidney damage over time. Stages help clinicians and patients use shared language about kidney filtering. They can also guide how often labs may be followed and when planning conversations may be useful.

CKD stages are not a complete description of a person. Two people with the same eGFR may have different risks depending on urine albumin, diabetes, blood pressure, heart disease, age, medicines, and other findings. Ask your clinician to explain your stage with your full health picture.

General eGFR stage ranges

Patient education resources often describe G1 as eGFR 90 or higher, G2 as 60-89, G3a as 45-59, G3b as 30-44, G4 as 15-29, and G5 as below 15. G1 and G2 usually require other evidence of kidney damage, such as albuminuria, to fit CKD.

These ranges are educational. Your clinician may interpret results differently when there has been an acute illness, a recent hospital stay, a medicine change, or another condition that can affect creatinine. Trends over at least several months often matter.

  • G1: eGFR 90 or higher, with other signs if CKD is present
  • G2: eGFR 60-89, with other signs if CKD is present
  • G3: eGFR 30-59, often split into G3a and G3b
  • G4: eGFR 15-29, advanced CKD
  • G5: eGFR below 15, kidney failure range for some patients

Why albuminuria changes the discussion

Albuminuria means albumin is present in urine. KDIGO and patient education resources often pair eGFR categories with albuminuria categories because urine albumin can signal kidney filter damage and higher risk. This is why a urine test may be ordered even when a blood test has already been done.

A person with moderate eGFR reduction and high urine albumin may need different follow-up than a person with the same eGFR and little albuminuria. Ask whether your CKD stage includes urine albumin information or only the eGFR number.

How stages may affect planning

Earlier stages may focus on understanding cause, monitoring labs, reviewing blood pressure and diabetes, and avoiding avoidable kidney stress when appropriate. Later stages may add more detailed conversations about symptoms, anemia, bone and mineral labs, nutrition, treatment options, transplant referral when appropriate, and dialysis education if it becomes relevant.

The Kidney Experts serves West Tennessee patients in Jackson, Dyersburg, Union City, Covington, and nearby communities. This article is educational information only. It does not diagnose kidney disease and does not replace individualized medical advice from your clinician or nephrology team.

Questions to ask your care team

  • What is my CKD stage based on current results?
  • Does my stage include urine albumin information?
  • Is my kidney function stable or changing?
  • What labs should I ask about before the next visit?
  • At what point should I ask about treatment options education or transplant referral?

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