Fingerstick Glucose (Capillary Blood Glucose)
This test measures the amount of glucose (sugar) in a small sample of blood taken from your fingertip. It helps monitor blood sugar levels, often used for diabetes management.
["Quick blood sugar check to track how your body processes food and manage diabetes."]
Key facts at a glance
- LOINC
- 24705-6
- Short code
- MR Finger
- Synonyms
- MR Finger
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- mr
- CPT
- 86430
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters
Fingerstick glucose tests are commonly used to check blood sugar levels at home or in a clinical setting. They provide immediate results, which can help you adjust your diet, exercise, or medication if needed. This test is especially important for people with diabetes to prevent complications like high or low blood sugar.
How the Test Works
A small drop of blood is collected from your fingertip using a sterile lancet. The blood is then applied to a glucose monitoring device or test strip. The device measures the glucose concentration in the blood and provides a result in seconds.
What to Expect Before the Test
You can usually perform this test at home or in a doctor’s office. If done at home, follow the manufacturer’s instructions carefully. If done in a lab, you may need to fast or avoid certain foods for a specified period, depending on the reason for the test.
What to Expect During the Test
The test involves a quick prick of your fingertip with a small needle. A small amount of blood is collected. This usually causes minimal discomfort and is over quickly. You may feel a slight sting or pinch.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Glucose levels measured through fingerstick tests are critical for diagnosing diabetes, monitoring its progression, and ensuring proper treatment. High or low blood sugar levels can indicate underlying health issues, such as insulin resistance, liver or kidney problems, or hormonal imbalances. Regular monitoring helps prevent long-term complications like nerve damage, heart disease, or vision problems.
Frequently asked questions
How often should I get this test if I have diabetes?
What does a normal blood sugar level mean for this test?
Can I eat or drink before a fingerstick glucose test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy