Conditions we treat
Type 2 diabetes develops when the body doesn’t respond well to insulin (insulin resistance) and the pancreas can no longer make enough extra insulin to compensate. Blood glucose rises gradually, often without obvious symptoms, and over time high levels can damage the heart, kidneys, eyes, and nerves. It is by far the most common type of diabetes. With today’s treatments and a plan built around your goals, many people can reach healthy glucose levels and lower their risk of complications.
40.1 million
people in the U.S. have diabetes, about 12% of the population
90–95%
of Americans with diabetes have type 2
27.6%
of U.S. adults with diabetes are undiagnosed
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In type 2 diabetes, muscle, fat, and liver cells stop responding normally to insulin, so glucose stays in the blood instead of fueling your cells. The pancreas works harder to keep up, but its insulin-producing cells gradually wear down. That is why type 2 diabetes tends to change over time and treatment often needs adjusting.
The condition usually develops over years, often passing through prediabetes first. Finding and treating it early can help protect your long-term health.
According to the CDC, your risk of type 2 diabetes is higher if you:
Many people have no symptoms at first. When symptoms appear, they can include increased thirst and urination, blurred vision, fatigue, slow-healing cuts, frequent infections, and tingling or numbness in the hands or feet.
Over the years, uncontrolled glucose, blood pressure, and cholesterol raise the risk of heart attack, stroke, chronic kidney disease, diabetic eye disease, nerve damage, and foot ulcers. The goal of treatment is not just a better number but protecting these organs. The American Diabetes Association recommends screening all adults starting at age 35, and earlier for people with overweight who have other risk factors.
Unless symptoms make the diagnosis obvious, an abnormal result is usually confirmed with a second test. A1C can be misleading in people with certain hemoglobin variants, anemia, recent blood loss, or pregnancy, so glucose-based tests may be used instead.
Diabetes is diagnosed when a result meets one of the American Diabetes Association’s diagnostic thresholds:
Treatment starts with healthy eating, regular activity (at least 150 minutes a week for most adults), good sleep, and weight management. For people with excess weight, meaningful weight loss can substantially improve glucose, and some people reach normal glucose levels without medication for a time, known as remission.
Most people also benefit from medication, chosen based on A1C, weight goals, heart and kidney health, hypoglycemia risk, and cost. For people with heart disease, heart failure, or chronic kidney disease, the ADA recommends medicines with proven heart or kidney benefits regardless of A1C. Common options include:
A long-standing, low-cost option that many people start with
Which lower glucose and support weight loss; some also lower cardiovascular risk
Which help protect the kidneys and reduce the risk of hospitalization for heart failure
Which may be needed at diagnosis or later; needing insulin reflects how the disease progresses, not a personal failure
A specialist visit starts with a detailed review of your history, current medications, and glucose data from your meter or CGM. We often suggest a CGM, even for a short period, to show how meals, activity, and sleep affect your glucose. Labs typically include A1C, kidney function (eGFR and urine albumin), cholesterol, liver tests, and vitamin B12 if you’ve taken metformin long term.
From there, we build a step-by-step plan: adding or adjusting medications, titrating doses at follow-up visits, and managing side effects. Your primary care doctor receives visit notes so your care stays connected, and we can refer you to dietitians, diabetes education programs, eye specialists, and podiatrists. Schedule a visit in person or online.
Some people, particularly those who achieve significant weight loss early in the course of the disease, can bring their glucose back into the non-diabetes range without medication. This is usually called remission rather than a cure, because glucose can rise again over time. Regular monitoring continues, and any changes to medication should always be made with your care team.
Not necessarily. Many people manage type 2 diabetes for years with lifestyle changes and non-insulin medicines, including newer injectable options. Because insulin production can decline over time, some people do eventually need insulin, and it can be the best tool when glucose is very high. Starting insulin is a normal part of treatment for many people, not a sign that you have failed.
GLP-1 receptor agonists and dual GIP/GLP-1 medicines lower glucose, support weight loss, and some have proven heart benefits, making them a strong option for many adults with type 2 diabetes. They aren’t right for everyone: side effects, certain medical histories, pregnancy plans, and cost all matter. Your endocrinologist can help you weigh the benefits and risks for your situation.
The American Diabetes Association recommends A1C testing at least twice a year if you are meeting your goals, and about every three months if your treatment has changed or you’re not yet at goal. If you use a CGM, your time-in-range data adds valuable day-to-day detail between A1C tests and can help guide treatment decisions.
No. Your endocrinologist works alongside your primary care doctor rather than replacing them. We focus on diabetes medications, glucose data, and related hormone issues, then send visit notes and recommendations so your primary care doctor stays informed. Many patients see a specialist during a period of intensive adjustment and then continue routine care with their primary care team.
Last reviewed September 19, 2026. This page is educational and is not a substitute for personal medical advice — see our medical disclaimer.
Related conditions
An autoimmune condition that requires daily insulin. We help you fine-tune insulin, CGM, and pump settings for safer, steadier glucose.
Higher-than-normal blood sugar that rarely causes symptoms. Acting early can lower your chances of developing type 2 diabetes.
High blood sugar that first appears in pregnancy. We work with your OB team on glucose targets, insulin if needed, and postpartum follow-up.
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