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...

CAP 2024c Summary Report

The summary report for the CAP 2024 GH5c proficiency survey is now available. Download...

Increase in NGSP Certification Prices

NGSP laboratory and manufacturer certification costs have increased. Read more...

HbA1c is now a CLIA-regulated Analyte

The new CMS rule will impact HbA1c proficiency testing. Read more...