Hemoglobin A1c (HbA1c) Fractional Distribution by Electrophoresis
This test measures the breakdown of hemoglobin A1c into its component parts using electrophoresis, which helps assess how glucose levels have affected your red blood cells over time.
["Understanding your HbA1c subtypes can help tailor your diabetes management."]
Key facts at a glance
- LOINC
- 54103-7
- Short code
- Hgb Fract DBS Elph
- Synonyms
- Hgb Fract DBS Elph
- 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
- electrophoresis
- 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 Is Done
Doctors may order this test if they suspect variations in your HbA1c levels that aren’t fully explained by standard HbA1c measurements. It can also be used to investigate rare hemoglobinopathies or to monitor specific conditions affecting red blood cell metabolism.
What to Expect Before the Test
No special preparation is needed. A small blood sample will be taken from a vein in your arm, similar to a regular blood draw. You may feel a slight pinch, but it usually doesn’t cause discomfort.
What the Results Mean
Standard HbA1c measures overall average blood sugar, but this test provides a more detailed breakdown. Results may show proportions of different HbA1c subtypes (e.g., HbA1cA, HbA1cB, etc.), which can indicate how consistently your blood sugar has been managed.
Common Conditions Monitored
This test is particularly useful for diagnosing or monitoring conditions like hereditary hemolytic anemia, certain hemoglobin disorders, or evaluating responses to treatments that affect red blood cell lifespan.
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.
◆Associated findings1
Short name
HbA1c Subtype Profile
Frequently asked questions
How long does it take to get my results back?
Can I eat or drink before this test?
Is there any risk or side effect from this blood draw?
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