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...

2018 Manufacturer Forum at the AACC

The NGSP/IFCC Manufacturer Forum will be held on Monday June 30 in Chicago. Read more...

CAP 2018 GH5a Summary Report

The summary report for the CAP 2017 GH5c proficiency survey is now available. Download...

New Certification Criteria for 2019

The NGSP certification criteria will be tightened beginning in 2019. Read more...

2017 NGSP Meetings

The minutes of the 2017 Clinical Advisory Committee, Steering Committee, Manufacturer Forum and C-peptide Standardization Manufacturer meetings are now available.