
Experts introduce the 2026 AACE type 2 diabetes algorithm’s new classification pathway and frame misclassification—especially of adult-onset type 1 diabetes—as a central problem the update is designed to address.
Today we’re focusing on what may be the single biggest conceptual addition to this update — a brand-new diabetes classification algorithm that pushes clinicians to look beyond a default diagnosis of type 2.

Experts introduce the 2026 AACE type 2 diabetes algorithm’s new classification pathway and frame misclassification—especially of adult-onset type 1 diabetes—as a central problem the update is designed to address.

Experts review standard diagnostic criteria for diabetes, then detail phenotypic and clinical features that support—but do not definitively confirm—a diagnosis of type 2 diabetes, emphasizing the limitations of BMI-based assumptions.

Spot hidden type 1/LADA in overweight adults: learn key red flags, and how autoantibodies plus C-peptide guide accurate diagnosis.

Learn key clues that diabetes isn’t type 2, and how autoantibody tests plus C‑peptide guide accurate adult type 1/LADA diagnosis.

Explore signs of uncommon diabetes—from pancreatic disease and MODY to steroid, transplant, and checkpoint-inhibitor autoimmune causes.

Learn how clinicians spot uncommon diabetes causes—from pancreatic disease and MODY to steroids, transplants, and checkpoint inhibitors—before treatment.