Hemoglobin A1c (HbA1c) by Oxygen Saturation Measurement
This test measures the percentage of hemoglobin that is glycated (bound to sugar) over the past 2–3 months, reflecting your average blood sugar levels. It’s often used alongside traditional HbA1c to assess how well your blood sugar is controlled.
["Helps track long-term diabetes management and glucose control."]
Key facts at a glance
- LOINC
- 14775-1
- Short code
- Hgb BldA Oximetry-mCnc
- Synonyms
- Hgb BldA Oximetry-mCnc
- 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
- Method
- oximetry
- 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 This Test Matters
HbA1c is a key marker for diabetes management because it provides a snapshot of your blood sugar control over time, independent of daily fluctuations. While traditional HbA1c tests measure glycated hemoglobin, this oximetry-based approach may offer additional insights into oxygen-carrying capacity of red blood cells, which can indirectly reflect metabolic stress.
How It’s Performed
This test uses a specialized device to measure oxygen saturation in your blood while simultaneously analyzing glycated hemoglobin. A small blood sample is taken from your arm, similar to a regular blood draw. The results are derived from the combined data of oxygen levels and hemoglobin modifications.
What to Expect Before the Test
No special preparation is needed. You may have a slight pinch when the blood is drawn, but it’s a quick and common procedure. If you’re on blood thinners or have a history of bleeding issues, inform your healthcare provider beforehand.
What the Results Mean
Results are typically reported as a percentage (e.g., 7.5%) and compare to your average blood sugar levels. While this test is similar to traditional HbA1c, the oximetry method may provide additional context about red blood cell function and oxygen handling, which can be useful for certain conditions.
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.
Clinical Significance: Beyond Standard HbA1c
Short name
HbA1c (Oximetry)
Frequently asked questions
What does an abnormal HbA1c (Oximetry) result mean?
Can this test replace traditional HbA1c?
How often should I get this test?
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