Hemoglobin A1c (HbA1c) with Glycated Albumin Ratio
This test measures the average blood sugar levels over the past 2–3 months by analyzing hemoglobin and albumin, which are proteins in your blood. It helps assess long-term glucose control, especially useful for people with diabetes or prediabetes.
["This test provides insight into how well your blood sugar has been managed over time, beyond just recent readings."]
Key facts at a glance
- LOINC
- 10486-9
- Short code
- Hgb Ag Tiss Ql ImStn
- Synonyms
- Hgb Ag Tiss Ql ImStn
- Category
- hematology
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 12
- Ref high
- 17.5
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- immune-stain
- CPT
- 85018
- SNOMED
- 900000000000003004
- 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 This Test Matters for Blood Sugar Control
HbA1c reflects your average blood sugar levels over months because hemoglobin naturally binds to glucose. This test is particularly valuable because it accounts for fluctuations in recent blood sugar that daily glucose measurements might miss. It’s a key tool for doctors to adjust diabetes treatments and monitor long-term health risks like nerve damage or kidney disease.
How the Test Works: Measuring Glycated Proteins
The test measures two key proteins in your blood: hemoglobin (which carries oxygen) and albumin (a protein produced by your liver). Both proteins can bind to glucose over time, forming glycated versions (HbA1c and glycated albumin). Advanced laboratory techniques separate and quantify these glycated proteins to calculate the ratio, which helps assess overall blood sugar control.
What to Expect Before the Test
No special preparation is needed for this test. It’s typically drawn from a simple blood sample, usually taken from your arm. If you’re taking insulin or other diabetes medications, let your healthcare provider know, as this may affect your results. If you have a blood sugar test scheduled soon, your provider may advise timing your tests to avoid overlap.
Common Causes of Abnormal Results
HbA1c results can be influenced by factors like recent illness, stress, or certain medications. For example, severe infections or dehydration can temporarily raise HbA1c levels, while some medications (like steroids) may lower it. If your results are unusually high or low, your doctor may review your medical history and other tests to understand the cause.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: When to Pay Attention to Results
Short name
HbA1c + Albumin Ratio
Frequently asked questions
How often should I get this test?
What does an abnormal HbA1c mean?
Can diet or exercise affect my HbA1c results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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