Welcome to the NGSP Web Site

The purpose of the NGSP is to standardize Hemoglobin A1c test results to those of the Diabetes Control and Complications Trial (DCCT) and United Kingdom Prospective Diabetes Study (UKPDS) which established the direct relationships between HbA1c levels and outcome risks in patients with diabetes.

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The Relationship Between HbA1c and Estimated Average Glucose (eAG)

More about the DCCT | More about the UKPDS

Convert between NGSP, IFCC and eAG

We have added a tool for converting between NGSP(%), IFCC (mmol/mol) and eAG (mg/dL) units. Click here...

Interferences with HbA1c Measurements

Factors that can result in falsely elevated or lowered HbA1c results include hemoglobin variants and conditions which affect red cell lifespan. Read more...

2019 NGSP/IFCC Manufacturer Forum

The annual Manufacturer Forum will be held during the AACC Annual Scientific Meeting & Clinical Lab Expo. Details...

CAP 2019 GH5a Summary Report

The summary report for the CAP 2019 GH5a proficiency survey is now available. Download...

New Certification Criteria for 2019

The NGSP certification criteria have been tightened beginning in 2019. Read more...

New CAP Criterion for 2020

The CAP criterion for passing the GH surveys will be tightened beginning in 2020. Read more...