Should You Get an A1c Test? - My Virtual Physician (2024)

August 17, 2021

Should You Get an A1c Test? - My Virtual Physician (1)

More than 100 million Americans are living with abnormal blood sugar. Is it possible that you could be one of them? A simple A1c screening blood test shows when levels are too high. Elevated blood sugar means higher risk for diabetes.

A glycated hemoglobin, or hemoglobin A1C, test (HbA1c) is one screening test that checks blood sugar levels. Results show how much sugar is in the bloodstream over time. Testing is accurate since values are not affected by acute illness or stress. A1c screening is recommended for certain populations, including overweight adults and those with other risk factors.

Those thinking about blood sugar testing or wondering about risk factors should talk to their doctor. Here are some common questions about diabetic screening and A1c testing.

Should You Get An A1C Test

The A1c test can detect diabetes because it measures how much sugar, called glucose, is found in red blood cells. The red blood cells give a “glycemic history of the past 120 days.

Everyone has sugar in their blood. But diabetics have higher levels. Blood sugar that is too high leads to cell and tissue damage.

When someone is diagnosed with diabetes, their doctor will also use the A1c test to monitor how the disease is being controlled.

A1c readings are measured in percentage. Here is what A1c results mean.

  • Below 5.7% = Blood sugar is normal
  • Above 5.7%, but less than 6.4% = Blood sugar is high, could mean prediabetes
  • Above 6.5% = Blood sugar is elevated, likely diabetes

Higher blood sugar levels cause greater A1c values, and they equal greater risk for diabetes.

Who Needs A1C Testing, and When?

Early detection is key in diabetes because early treatment can prevent serious complications. When a problem with blood sugar is found, doctors and patients can take steps to prevent permanent damage to the heart, kidneys, eyes, nerves, blood vessels, and other vital organs.

Here are the current recommendations for A1c screening.

The Center for Disease Control and Prevention (CDC) Recommendations

The CDC suggests A1c screening to know a baseline for:

They further recommend that any woman who has ever had gestational diabetes should have an A1c check every three years even if results are normal.

The United States Preventive Task Force (USPTF) Recommendation

The USPTF also says that adults over age 45 should be checked for diabetes using the A1c test. Furthermore, it recommends repeat testing every three years.

The American Diabetes Association (ADA) Recommendation

The ADA also recommends the A1c test, or other diabetic screening, for all adults at age 45 and over. Additionally, it advises overweight individuals with one or more risk factors to be screened, regardless of age. If results are normal, repeat screening is recommended every three years or less.

How to Get an A1C Test

If you meet some of these guidelines, you might be wondering how you can get a screening test.

A primary care doctor or other licensed provider can order this common blood test. Results take as little as a few business days.

Those who do not have a doctor to order the test, can still get this valuable screening. An online doctor or virtual physician can help. Telemedicine providers work with laboratory partners to treat patients without unnecessary trips to an office.

An online physician sends referrals and lab orders just like a brick-and-mortar doctors office. After going to a lab for blood work, virtual doctors offices schedule follow up video visits to go over the results, answer questions, and discuss treatment plans.

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Should You Get an A1c Test? - My Virtual Physician (2024)

FAQs

How reliable are home A1C tests? ›

Home A1C tests are reliable, but check for FDA approval

FDA-approved, at-home tests are reliable and backed by research. Results show that you can get accurate results with do-it-yourself testing. But before purchasing your kit, you want to make sure your test kit will give you results that you can trust.

Why don't doctors test for A1C? ›

The A1C test should not be used to diagnose type 1 diabetes, gestational diabetes, or cystic fibrosis link-related diabetes. The A1C test may give false results in people with certain conditions. Having prediabetes is a risk factor for developing type 2 diabetes.

Can I get an A1C test without a doctor's order? ›

Yes! Thanks to convenient online platforms like Sesame, you can book, schedule, and pay for an HbA1c test near you - without ever stepping into a doctor's office. Sesame has partnered with over 1,500 Quest Diagnostic locations to offer blood testing - such as an HbA1c - at affordable cash prices, without insurance.

Can at-home A1C test be wrong? ›

In a study of 219 people with type 1 or type 2 diabetes, researchers found large discrepancies in the results of three at-home A1C tests. The Home Access test performed the best, followed by the A1CNow+ test, with the CoreMedica test demonstrating the lowest accuracy.

What can throw off an A1C test? ›

Several factors can falsely increase or decrease your A1C result, including:
  • Kidney failure, liver disease, or severe anemia.
  • A less common type of hemoglobin that people of African, Mediterranean, or Southeast Asian descent and people with certain blood disorders (such as sickle cell anemia or thalassemia) may have.

What are the cons of A1C test? ›

Limitations of the A1C test
  • Pregnancy.
  • Recent or heavy blood loss.
  • Recent blood transfusion.
  • Conditions that result in insufficient red blood cells (anemias)
  • Hemoglobin variants.
Dec 1, 2022

What can make A1C falsely high? ›

Several medications and substances have also been reported to falsely elevate A1c including lead poisoning2, chronic ingestion of alcohol, salicylates, and opioids. Ingestion of vitamin C may increase A1c when measured by electrophoresis, but may decrease levels when measured by chromatography.

How often are A1C tests wrong? ›

The test that doctors most often rely on to detect a person's risk for prediabetes and type 2 diabetes—the hemoglobin A1c (A1c) blood test—too often delivers a poor reading, thereby missing the diagnosis in nearly three out of four at-risk individuals, according to research presented at the Endocrine Society meeting in ...

What A1C is no longer diabetic? ›

The American Diabetes Association (ADA) released guidelines last month defining "remission" as an A1c < 6.5% "measured at least 3 months after cessation of glucose-lowering pharmacotherapy." They further recommend that: A1c testing occur at least annually to confirm continued remission.

How can I check my A1C at home? ›

Several FDA-approved home A1C test kits are available at pharmacies and online retailers. Some health insurance plans cover the cost, which can run between $50 to $150. Accessories for the test, such as replacement strips, are sold as well, so be sure to check that you have all of the necessary parts.

Can I get my A1C checked at CVS? ›

At MinuteClinic®, a preventative health screening involves taking detailed medical and family histories, doing a physical exam, taking blood pressure and performing blood tests. The blood tests include: A blood sugar or A1C check.

How much is an A1C test out of pocket? ›

On MDsave, the cost of a Hemoglobin A1C ranges from $11 to $128. Those on high deductible health plans or without insurance can shop, compare prices and save.

What not to do before an A1C test? ›

It shows your average blood sugar level for the past 3 months, and doctors use it to diagnose diabetes and prediabetes. It's also the main test to help with diabetes management. You don't need to fast before the HbA1C test. You can eat and drink as usual, and you can have the test at any time of day.

What should I avoid before A1C test? ›

Don't eat high-sugar foods or simple carbs (including refined grains) the morning of your glucose screening. The body breaks these foods down quickly, leading to a spike in blood sugar levels. That means avoiding breakfast favorites like: Orange juice and other fruit juices.

What is normal A1C by age? ›

A1C levels by age
Age groupAll respondentsWomen
20–39 years4.0–6.04.0–5.8
40–59 years4.1–6.24.1–6.1
≥ 60 years4.4–6.64.4–6.5
Nov 22, 2023

Is the Walgreens A1C test kit accurate? ›

I have used these tests multiple times, including the same day as lab A1c tests. These typically are 0.3 to 0.5 lower than the lab values. With that in mind, I still find them to be very useful as a way to keep an eye on my glucose levels in the 6 months between doctor visits.

How often is A1C inaccurate? ›

Depending on the machine, a single A1C test can have up to a 0.5% margin of error, which means the “true” value might be 0.5% higher or lower than the measured A1C. For example, if a lab report shows an A1C value of 7.0%, the actual A1C value might range from 6.5% and 7.5%.

Can you have a falsely elevated A1C? ›

If you have an elevated A1C (above 6.5%) for the first time, it doesn't always mean that you have diabetes. Other factors, such as certain medications (like steroids) or sickness can temporarily increase your blood sugar levels. Anemia and other conditions can cause a falsely high A1C result, as well.

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