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Hemoglobin A1c (HbA1c) with 24-Hour Urine Collection for Creatinine Clearance

Published: August 9, 2026Updated: August 16, 2026

This test measures your average blood sugar levels over the past 2–3 months and evaluates how well your kidneys filter waste from your blood using a 24-hour urine sample.

Quick summary

["Helps assess long-term blood sugar control and kidney function together."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
77453-9
Short code
Deprecated Hind+Mid ft DXA BMD
Synonyms
Deprecated Hind+Mid ft DXA BMD
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr-dxa
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why HbA1c Matters for Blood Sugar Control

HbA1c reflects your average glucose levels over time, giving doctors a clearer picture of how well your diabetes or prediabetes is managed. It’s not affected by short-term fluctuations like meals or stress.

Understanding Kidney Function in Urine Clearance

The urine creatinine clearance test checks how efficiently your kidneys remove creatinine—a waste product from muscle breakdown—from your blood. This helps identify kidney issues that may affect how well your body processes other medications or waste.

How This Test Is Performed

For HbA1c: A small blood sample is taken from your arm. For urine clearance: You’ll collect all urine for 24 hours in a container. Results are combined to calculate both measures.

What Results Mean

HbA1c results (typically 4–12% range) indicate average blood sugar levels. Urine clearance results (varies by age/sex) assess kidney function. Together, they help diagnose diabetes, monitor treatment, or rule out kidney problems.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Diabetes and Kidney Health Link

Short name

HbA1c + Urine Creatinine Clearance

Frequently asked questions

HbA1c + urine clearance together help detect early kidney damage in people with diabetes, as high blood sugar can damage kidney filters. This test is especially useful for those with diabetes, chronic kidney disease, or high blood pressure.
This test helps doctors track how well your diabetes is controlled and whether your kidneys are handling waste properly, reducing long-term risks like heart disease or kidney failure.
What causes high or low HbA1c or urine creatinine clearance?
High HbA1c may indicate poor blood sugar control (e.g., untreated diabetes), while low values could signal recent blood loss or severe anemia. High urine creatinine clearance often means healthy kidneys filtering well, but low values may signal kidney disease or dehydration.
How often should I get this test?
Typically recommended annually for people with diabetes or kidney concerns. Your doctor may adjust frequency based on your health status, treatment plan, or symptoms like fatigue, swelling, or frequent urination.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy