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Hemoglobin A1c (HbA1c) and Hemoglobin F (HbF) with Full Mutant and Fetal Hemoglobin Level (HBA1/HBA2 Full Mutan)

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

This test measures your blood levels of different types of hemoglobin, including the long-term average blood sugar (HbA1c) and fetal hemoglobin (HbF), which can help assess diabetes management and potential genetic conditions.

Quick summary

["This test helps track blood sugar control and identify inherited blood disorders."]

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

Key facts at a glance

LOINC
101387-9
Short code
HBA1 + HBA2 Full Mut Anl Bld/T
Synonyms
HBA1 + HBA2 Full Mut Anl Bld/T
Category
chemistry
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

Why This Test Matters for Blood Sugar Control

HbA1c reflects your average blood sugar levels over the past 2–3 months, providing insight into how well your diabetes or prediabetes is managed. It’s a key tool for doctors to adjust treatments and prevent complications like nerve damage or heart disease.

Understanding Fetal Hemoglobin (HbF) and Mutant Hemoglobins

HbF is naturally present in newborns but usually decreases after birth. Elevated levels may suggest conditions like sickle cell trait or thalassemia. Mutant hemoglobins (e.g., HbS in sickle cell disease) can alter blood flow and cause pain or anemia.

How the Test Works

Your blood sample is analyzed using high-performance liquid chromatography (HPLC) to separate and measure different hemoglobin types. This method is precise and avoids interference from other blood components.

Common Reasons for This Test

Doctors order this test to monitor diabetes, screen for inherited blood disorders, or evaluate fetal hemoglobin levels in conditions like thalassemia or sickle cell disease.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HbA1c/HbF Profile

Frequently asked questions

What does an abnormal HbA1c result mean?
An elevated HbA1c suggests your blood sugar has been consistently higher than recommended, which could increase your risk of long-term health problems. Your doctor will discuss lifestyle changes, medications, or other tests to investigate further.
Why might my HbF levels be higher than expected?
Higher-than-normal HbF could be due to genetic conditions like sickle cell trait or thalassemia. If this is unexpected, your doctor may recommend genetic counseling or additional blood tests to check for inherited disorders.
Could mutant hemoglobin variants affect my daily activities?
Yes, certain mutant hemoglobins (e.g., HbS in sickle cell disease) can cause pain, fatigue, or anemia. Your doctor may prescribe preventive treatments, hydration, or pain management to help manage symptoms.
  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