Glucagon Blood Test Test

This test measures the amount of glucagon in your blood. Glucagon is a hormone that helps control your blood sugar levels. It is used to help diagnose conditions like low blood sugar, pancreatitis, or a rare pancreatic tumor.

What this test measures

This test measures the amount of glucagon in your blood. Glucagon is a hormone made by your pancreas that works with insulin to maintain your body's blood glucose (sugar) levels.

What your results mean

Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.

Higher-than-normal results

If your glucagon levels were not in the normal range, it may be a sign of diabetes, acute or chronic pancreatitis, or glucagonoma (a rare pancreatic tumor).

Lower-than-normal results

If your glucagon levels were not in the normal range, it may be a sign of hypoglycemia (low blood sugar).

Frequently asked questions

What is a glucagon blood test?

It measures the amount of glucagon in your blood. Glucagon is a hormone made by your pancreas that helps control blood sugar.

Why is this test done?

It is most often used to help diagnose hypoglycemia, pancreatitis, or glucagonoma. It may also be used to monitor people with diabetes.

What does glucagon do in the body?

Glucagon increases your blood glucose levels. It works with insulin, which lowers blood glucose.

What does a high glucagon level mean?

It may be a sign of diabetes, acute or chronic pancreatitis, or glucagonoma.

What does a low glucagon level mean?

It may be a sign of hypoglycemia (low blood sugar).

Sources

MedlinePlus: Glucagon Blood Test — NIH MedlinePlus

Last updated July 7, 2026. Information is aggregated from official public sources and is not a substitute for professional medical care.