Singapore General Hospital will NEVER ask you to transfer money over a call. If in doubt, call the 24/7 ScamShield helpline at 1799, or visit the ScamShield website at www.scamshield.gov.sg.

Help Us Improve Your Experience:

We’d love to hear from you! Rate the SGH website and share your feedback so we can enhance your online experience and serve you better. Click here to rate us

HbA1c, BLOOD

Synonym(s):
Lab Section Category
View write-up
Specimen Required

​3 mL EDTA blood

Do not centrifuge as whole blood is required.

Method

​Immunoassay

Reference Interval / Value

≥ 13 yrs:
The HbA1c target for most non-pregnant adults with type 1 or 2 diabetes should be < 7.0% or < 53 mmol/mol.
Please refer to the latest Ministry of Health guidelines for further details on target HbA1c values, frequency of testing and the use of HbA1c as a screening test for diabetes.

Turnaround Time

Mean = 4 hrs, Range: 3 – 5 hrs

Day(s) Test Set up

Monday - Saturday

Remarks

​With effect from 2 Jan 2020,

HbA1c result is reported in both NGSP (%) and IFCC (mmol/mol) units.

Change History Notes

  • 13 Apr 2020 05:15 PM

    ​Reference Interval and Remarks are updated on 13 Apr 2020.

Back: Pathology Laboratory Services

Last Updated - 13 Jun 2025