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Hemoglobin A1c (HbA1c) with Electrophoresis

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

This test measures the percentage of hemoglobin that is glycated (HbA1c) and analyzes its distribution using electrophoresis, a method that separates different types of hemoglobin based on their electrical charge.

Quick summary

["Helps monitor long-term blood sugar control and identify variations in hemoglobin types."]

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

Key facts at a glance

LOINC
4610-2
Short code
Hgb M-Sask Bld Ql
Synonyms
Hgb M-Sask Bld Ql
Category
hematology
Sample
whole-blood
Container
Lavender-top (EDTA)
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
CPT
85018
SNOMED
900000000000003004
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

Why HbA1c Electrophoresis Matters

HbA1c reflects your average blood sugar levels over the past 2–3 months, giving insight into how well your diabetes or prediabetes is managed. Electrophoresis helps distinguish between different hemoglobin variants, which can be important for diagnosing conditions like sickle cell disease or thalassemia.

How the Test Works

A small blood sample is taken and processed to separate hemoglobin types by charge. The separated bands are analyzed to quantify HbA1c and identify any abnormal hemoglobin forms.

What to Expect Before the Test

No special preparation is needed, but fasting is not required. Wear comfortable clothing for the blood draw, and inform your provider if you have a bleeding disorder or are on blood-thinning medication.

Common Causes for Testing

This test is typically ordered for people with diabetes to track blood sugar control, for those with unexplained anemia or hemoglobin abnormalities, or as part of a genetic screening for hemoglobin disorders.

Reference range

Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A

Specimen: whole-blood

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.

◆Associated findings1

Short name

HbA1c Electrophoresis

Frequently asked questions

What does an abnormal HbA1c or unusual electrophoresis pattern indicate?
An elevated HbA1c suggests poor blood sugar control, while abnormal electrophoresis bands may reveal inherited hemoglobin disorders (e.g., sickle cell trait or thalassemia). Your provider will discuss results in the context of your symptoms and medical history.
How often should I get this test?
Frequency depends on your health status. People with diabetes usually get HbA1c checked every 3–6 months, while those with suspected hemoglobin disorders may need more frequent or specialized follow-up.
Does this test require fasting?
No, fasting is not required for HbA1c electrophoresis. However, your provider may recommend fasting for other related tests (like glucose levels) if needed for a full evaluation.
  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