You can get checked for diabetes at your primary care doctor’s office, and that’s the most common starting point. But it’s far from the only option. Urgent care clinics, community health centers, hospital outpatient labs, and even some pharmacies offer diabetes screening through a simple blood draw or finger stick. The test itself takes minutes, though you may need to fast beforehand depending on which one your provider orders.
Your Primary Care Doctor’s Office
A regular checkup with your primary care provider is the easiest path to diabetes screening. Your doctor can order a blood test during a routine visit, and many offices draw blood on-site or send you to a nearby lab. If you already have a provider, you can often request the test without scheduling a full physical. Just call and ask for a diabetes screening.
This route also gives you the benefit of context. Your doctor knows your weight, family history, medications, and other risk factors, which helps them interpret the results and recommend next steps if your numbers come back elevated.
Walk-In Clinics and Urgent Care
If you don’t have a primary care doctor, walk-in clinics and urgent care centers can run a basic blood sugar check. Many retail health clinics inside pharmacies like CVS MinuteClinic or Walgreens Healthcare Clinic offer point-of-care glucose testing. These won’t always run the full panel a doctor’s office would, but they can flag a problem and refer you for follow-up testing.
Keep in mind that a finger-stick glucose reading at a pharmacy kiosk is a snapshot, not a diagnosis. It tells you what your blood sugar is at that moment, which can vary based on when you last ate. A proper diagnosis requires one of the standardized lab tests described below.
Community Health Centers and Free Screenings
Federally qualified health centers (FQHCs) exist in every state and serve patients regardless of insurance status. They charge on a sliding scale based on income, and many offer free diabetes screenings as part of community outreach. Hospitals and nonprofit health systems frequently hold free screening events at community sites throughout the year, providing blood sugar checks alongside education and referrals.
To find an FQHC near you, search the Health Resources and Services Administration’s online tool at findahealthcenter.hrsa.gov. Local health departments also run periodic screening drives, especially during National Diabetes Month in November.
What Insurance Covers
Medicare Part B covers up to two blood glucose lab screenings per year if you have risk factors like high blood pressure, obesity, abnormal cholesterol, or a history of high blood sugar. You also qualify if two or more of the following apply: you’re 65 or older, you’re overweight, you have a family history of diabetes, or you have a history of gestational diabetes or delivering a baby over 9 pounds. There’s no copay for these preventive screenings under Medicare.
Most private insurance plans cover diabetes screening as a preventive service under the Affordable Care Act, which means no out-of-pocket cost when you see an in-network provider. If you’re uninsured, expect to pay roughly $10 to $50 for a basic glucose or A1C test at a lab like Quest Diagnostics or Labcorp, where you can sometimes order tests directly without a doctor’s referral.
The Three Main Tests
There are three standard ways to check for diabetes, and any of the locations above may use one or more of them.
- A1C test: Measures your average blood sugar over the past three months. No fasting required, making it the most convenient option. A result below 5.7% is normal, 5.7% to 6.4% indicates prediabetes, and 6.5% or higher means diabetes.
- Fasting plasma glucose test: Measures your blood sugar after you’ve had nothing to eat or drink (except water) for 8 to 12 hours. A result of 100 to 125 mg/dL signals prediabetes, while 126 mg/dL or above points to diabetes.
- Oral glucose tolerance test (OGTT): Considered the gold standard. You fast overnight, drink a sugary solution at the lab, then have your blood drawn two hours later. A two-hour result of 140 to 199 mg/dL indicates prediabetes; 200 mg/dL or higher indicates diabetes.
The A1C is the most popular for routine screening because you don’t need to fast, results are stable, and it reflects months of blood sugar patterns rather than a single moment. Your provider will typically confirm an abnormal result with a second test before making a formal diagnosis.
Who Should Get Screened
The U.S. Preventive Services Task Force recommends screening for adults aged 35 to 70 who are overweight (BMI of 25 or higher) or obese. But earlier screening is warranted if you’re American Indian, Alaska Native, Black, Hispanic, Latino, Asian American, Native Hawaiian, or Pacific Islander, because these groups face disproportionately high rates of type 2 diabetes. For Asian American individuals, screening is recommended at a BMI of 23 or higher rather than the standard 25.
Other reasons to get tested earlier include a family history of diabetes in a parent or sibling, a personal history of gestational diabetes, or a diagnosis of polycystic ovarian syndrome. If any of these apply to you, don’t wait until 35.
Why At-Home Tests Aren’t Enough
Over-the-counter glucose meters and newer non-invasive monitors can give you a rough idea of your blood sugar, but they aren’t reliable enough to diagnose diabetes. One study of a non-invasive home glucose monitor found that only 18.5% of its readings met international accuracy standards, and nearly 78% of readings fell outside the range the FDA considers acceptable. These devices can be useful for people already managing diabetes who need to track trends, but they’re not a substitute for a lab test when you’re trying to find out whether you have the condition in the first place.
If you’ve used a home meter and seen numbers that concern you, bring those readings to your appointment. They can help your provider decide which lab test to order, but the diagnosis itself will come from a certified lab result.
How to Prepare for Your Test
If your provider orders an A1C test, there’s nothing to do beforehand. You can eat and drink normally. For a fasting glucose test or an OGTT, you’ll need to avoid all food and beverages except water for 8 to 12 hours before your blood draw. Most people schedule these tests first thing in the morning so the fasting period overlaps with sleep.
Certain medications and supplements can affect blood sugar readings, so let your provider know everything you’re taking. Illness and acute stress can also temporarily raise glucose levels, which is why an abnormal result is usually confirmed with a repeat test on a separate day.