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.

2010 Consensus Statement on the Worldwide Standardization of HbA1c

Download Certification Packets

The Relationship Between HbA1c and Estimated Average Glucose (eAG)

More about the DCCT | More about the UKPDS

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...

CAP 2013 GH2a Summary Report

The summary report for the CAP 2013 GH2a proficiency survey is now available. Download...

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...

Change in CAP GH2 Survey Grading

The CAP will tighten the acceptable limit from +/-7% to +/-6% beginning in 2013. Read more….

Change in NGSP Criteria

New NGSP certification criteria went into effect beginning with September 2012 certifications. Read more….