Vitamin D test
Fatigue, muscle aches, or low mood can sometimes trace back to vitamin D. This test measures your levels with a simple blood draw.
Results reviewed by a licensed clinician
Insurance accepted, with clear pricing options before you book
Flexible scheduling at your choice of nearby labs
Most insurance accepted
Board-certified clinicians
No hidden fees
Available nationwide
What is a Vitamin D Test?
Deficiency and insufficiency detection
Identifies vitamin D levels below the optimal range (below 30 ng/mL) — a common finding that has been associated with fatigue, bone loss, immune dysfunction, mood changes, and increased susceptibility to illness.
Supplementation effectiveness
Confirms whether vitamin D supplementation is achieving adequate blood levels, providing the objective data needed to adjust dosing rather than guessing based on what you're taking.
Baseline and ongoing monitoring
Establishes a starting point for people who have never tested their levels and supports tracking over time — particularly important for those at higher risk of deficiency due to limited sun exposure, darker skin, age, or malabsorption conditions.
Complete insights in days
1
Book your test
Instantly schedule at 2,000+ labs nationwide, at a time that works for you. Most visits take 15 minutes or less, with both walk-ins and appointments available.
2
Get clinician-reviewed results
Your results are delivered quickly—and reviewed by medical professionals. You’ll get clear explanations, robust health insights, and recommended next steps tailored to your health needs.
3
Take action with physician guidance
Choose to review your results and manage your plan with a General Medicine physician—or simply use the insights on your own.
4
Track progress over time
Repeat annually to see trends, improvements, and new emerging risks or book individual tests that focus on your set goals
All your care in one place. That’s the General Medicine difference.
We help you understand your options, connect you to the right clinicians, manage prescriptions, coordinate any needed evaluations, and keep an eye on your overall health along the way. It’s comprehensive care that looks at the full picture — your goals, your history, your lifestyle — and makes it simple to move forward with confidence.
What's included
Test type
Blood sample
Collection method
Venipuncture
Fasting
Not required
Results processing time
1 to 3 days
25 OH Vitamin D (also known as Vitamin D, 25-OH, 25-Hydroxy Vitamin D, or Vitamin D, 25-Hydroxy)
This test measures your vitamin D levels using the most reliable method, 25-Hydroxy Vitamin D. It tells you if your body has enough vitamin D to support your bones, immune system, and overall health.
Ongoing support, always available.
You’ll be supported by experienced clinicians who care for a wide range of health needs, from everyday concerns to more complex conditions.
Our clinicians track your progress over time and adjust your care as needed. If medication is prescribed, we’ll manage dosing and monitor for side effects. If lab testing is recommended, we review results and refine your plan accordingly. You’re never left to navigate care on your own.
What our customers have to say
Hear from people who felt heard, understood, and supported on General Medicine.
“I found the ease of setting the appointment and how quickly I was able to be seen to be amazing. The physician was very friendly and amazingly helpful.”
Natalie, Texas
“The chat visit was super convenient. The doctor was friendly and took the time needed to answer any questions I had. The prescription I needed was called in and ready the same afternoon.”
Dustin, Tennessee
“I loved my General Medicine experience. It gave me peace of mind to know someone cared and I felt they listened to what I was saying.”
Ann, Florida
“General Medicine is easily the most approachable, efficient, high-quality, and responsive care team I've had the pleasure of working with.”
John, Utah
“General Medicine helped me get the imaging and blood work I needed, referred me to the right specialists, and even helped me find a new family doctor.”
Bridget, Mississippi
Dive deeper: get the support you need to action against your goals
Explore additional services designed to go deeper, treat identified risks, or support specific health goals. General Medicine makes it easy to take the next step.
Order your lab today.
Frequently asked questions
What level of vitamin D is considered deficient?
How do I prepare for my vitamin D test?
No fasting is required.
- If you take biotin (including hair, skin, and nail vitamins), stop 72 hours before your test (unless prescribed). Biotin can affect your result, and some multivitamins contain high doses, so check the label.
- Questions about a medication or supplement? Message us before your test.