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Glycosylated Hemoglobin (HbA1c) Multianalyte Profile (Screening)

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

This test measures the percentage of glycosylated hemoglobin in your blood, which reflects your average blood sugar levels over the past 2–3 months. It helps assess long-term diabetes control.

Quick summary

["HbA1c provides a snapshot of how well your blood sugar has been managed over time."]

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

Key facts at a glance

LOINC
105346-1
Short code
Glycosylation congen multi anl Bld/T
Synonyms
Glycosylation congen multi anl Bld/T
Category
glucose
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

HbA1c measures the proportion of hemoglobin molecules that have sugar (glucose) attached, indicating your average blood sugar levels. This test is particularly useful for diagnosing diabetes and monitoring its progression over time.

How the Test Works

Blood is drawn from a vein, typically in your arm. The sample is processed to separate hemoglobin components, which are then analyzed to determine the glycosylated fraction. Results are expressed as a percentage.

Why It Matters

HbA1c is a key indicator for managing diabetes and prediabetes. It helps healthcare providers track how well your blood sugar is controlled, even if your current blood sugar levels are normal.

Common Uses

This test is commonly used to diagnose diabetes, assess prediabetes risk, and evaluate long-term diabetes management in people with type 1 or type 2 diabetes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: HbA1c is a reliable marker for chronic blood sugar levels. It complements daily blood glucose monitoring by offering a broader picture of metabolic control. Abnormal results may prompt further testing or adjustments to treatment plans.

Short name

HbA1c Profile (Screening)

Frequently asked questions

How often should I get this test?
Typically, people with diabetes are advised to get HbA1c tested every 3–6 months, depending on their treatment plan and blood sugar stability. Your healthcare provider will determine the best frequency for you.
What does an abnormal HbA1c result mean?
An elevated HbA1c (typically ≥6.5%) suggests poor blood sugar control and may indicate diabetes or prediabetes. A lower result (below 5.7%) is generally considered normal. Your provider will discuss results in detail and recommend next steps.
Can lifestyle changes affect HbA1c results?
Yes, diet, exercise, and managing stress can improve HbA1c levels over time. Small, consistent lifestyle changes may lead to noticeable improvements in your long-term blood sugar control.
  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