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Hemoglobin A1c (HbA1c) with High-Performance Liquid Chromatography (HPLC) Analysis

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

This test measures the average level of blood sugar (glucose) over the past 2 to 3 months, reflecting how well your diabetes is managed.

Quick summary

["HbA1c helps doctors track long-term blood sugar control and adjust treatment plans if needed."]

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

Key facts at a glance

LOINC
105759-5
Short code
Mtb mabA gene INH hl res mut Islt/Spm
Synonyms
Mtb mabA gene INH hl res mut Islt/Spm
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
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

What HbA1c Measures

HbA1c is a form of hemoglobin (the protein in red blood cells that carries oxygen) that has been attached to glucose. It provides a snapshot of your blood sugar levels over time, accounting for fluctuations that occur daily. Unlike spot glucose checks, this test averages your glucose levels, offering a more stable picture of your metabolic health.

Why It’s Used

Doctors use HbA1c to diagnose diabetes, monitor existing diabetes, and evaluate how well treatments like medication or diet are working. It’s particularly useful for people with type 1 or type 2 diabetes, as well as those at high risk of developing diabetes.

How It’s Done

A small blood sample is taken from your arm, usually by a healthcare professional. The sample is then analyzed using high-performance liquid chromatography (HPLC), a precise method that separates and measures the different types of hemoglobin, including HbA1c.

What the Results Mean

Results are typically reported as a percentage. While specific ranges vary by lab and individual health status, higher percentages generally indicate poorer blood sugar control. For example, a result above 7% may suggest that your blood sugar levels are consistently too high.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

HbA1c is a critical tool for diabetes management because it reduces the impact of short-term blood sugar spikes or dips. Regular monitoring helps prevent long-term complications like nerve damage, kidney disease, or heart disease. It also encourages consistent lifestyle adjustments, such as diet and exercise, to improve overall health.

Short name

HbA1c

Frequently asked questions

How often should I get an HbA1c test?
The frequency depends on your health status. People with diabetes are often advised to get tested every 3 to 6 months, while those at high risk or without diabetes may need testing less often or more frequently based on their doctor’s recommendations.
What do my HbA1c results mean if I’m not diabetic?
If you’re not diagnosed with diabetes, an HbA1c result can still provide insight into your blood sugar levels. For example, a result below 5.7% is generally considered normal, while a result between 5.7% and 6.4% may indicate prediabetes, prompting lifestyle changes or further testing.
Can lifestyle changes affect my HbA1c results?
Yes! Making healthy choices like eating a balanced diet, staying physically active, and managing stress can improve your HbA1c levels. Even small adjustments, such as reducing sugar intake or increasing fiber, may lead to noticeable improvements over time.
  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