Type 2 Diabetes Mellitus: This is the most common form of diabetes and is often associated with insulin resistance and impaired insulin secretion. It is likely due to a combination of genetic and lifestyle factors, such as obesity and physical inactivity.

Type 1 Diabetes Mellitus: An autoimmune condition leading to the destruction of pancreatic beta cells, resulting in absolute insulin deficiency. Although less common than type 2, it can occur at any age and should be considered, especially in leaner patients or those with a strong family history of autoimmune diseases.
Latent Autoimmune Diabetes in Adults (LADA): A form of type 1 diabetes that occurs in adults, often initially misdiagnosed as type 2 diabetes due to its slower progression. Patients may initially be managed with oral medications but will eventually require insulin.
Steroid-Induced Diabetes: Glucocorticoids can cause insulin resistance and hyperglycemia. This should be considered in patients on long-term steroid therapy.
Pancreatic Diabetes (Pancreatogenic Diabetes): Damage to the pancreas from various causes (e.g., pancreatitis, pancreatic surgery, or pancreatic cancer) can lead to diabetes.

Cushing's Syndrome: A rare endocrine disorder caused by excess cortisol, which can lead to insulin resistance and diabetes. Missing this diagnosis could lead to significant morbidity and mortality due to the systemic effects of excess cortisol.
Pheochromocytoma: A rare tumor of the adrenal gland that can cause episodes of hypertension, tachycardia, and hyperglycemia due to excess catecholamine production. Although rare, it is critical to diagnose due to its potential for severe cardiovascular complications.
Hemochromatosis: A genetic disorder leading to iron overload, which can cause pancreatic damage and result in diabetes. Early diagnosis is crucial to prevent long-term complications, including liver disease and heart problems.

MODY (Maturity-Onset Diabetes of the Young): A form of diabetes caused by genetic mutations that affect insulin production. It typically presents at a young age but can be diagnosed later in life.
Wolfram Syndrome: A rare genetic disorder characterized by diabetes insipidus, diabetes mellitus, optic atrophy, and deafness.
Klinefelter Syndrome: A genetic condition in males that can increase the risk of developing diabetes, among other health issues.
Prader-Willi Syndrome: A rare genetic disorder that can lead to obesity and an increased risk of developing type 2 diabetes.