Vitamin D Test in Chantilly, VA
25-Hydroxy Vitamin D level — the most accurate vitamin D screen. $129 flat, no insurance needed. Results in 24–72 hours.
Walk-in price
Vitamin D Test
- Blood sample
- Results in 24–72 hours
- Doctor’s order included
- HSA / FSA accepted
4500 Daly Drive, Suite 240, Chantilly, VA 20151
What this test screens for
Understanding the Vitamin D
The Vitamin D Test measures 25-hydroxy vitamin D (25-OH D, sometimes called calcidiol) — the standard blood marker clinicians use to assess vitamin D status. Low levels are common in Northern Virginia adults, especially in winter months when sunlight exposure is reduced. The test is $129 at our Chantilly lab, walk-in friendly, no fasting required.
Vitamin D matters for more than bone health. Low levels are associated with fatigue, depressed mood, muscle weakness, frequent infections, and slower wound healing. Deficiency is widespread: studies suggest 40% or more of US adults have insufficient vitamin D levels, with rates higher in winter, in adults with darker skin pigmentation, and in adults who spend most of their day indoors.
Optimal vitamin D levels are typically defined as 30 to 100 ng/mL of 25-OH D. Levels between 20 and 30 ng/mL are insufficient; below 20 ng/mL is deficient. If your level is low, supplementation with vitamin D3 (cholecalciferol) is straightforward and inexpensive — but the right dose depends on your current level, so testing first and re-testing 8 to 12 weeks after starting supplementation is the typical pattern.
Why people get this test
- Persistent fatigue, low mood, or brain fog (especially in winter)
- Muscle weakness, bone pain, or frequent stress fractures
- Pre-supplementation baseline before starting vitamin D3
- Follow-up 8 to 12 weeks after starting or changing vitamin D dose
- Adults who work indoors year-round or use sunscreen consistently
- Adults over 50 (vitamin D synthesis declines with age)
- Adults with darker skin pigmentation (lower vitamin D production from sunlight)
- Pregnancy planning or active pregnancy
What to expect
From check-in to results — what your visit looks like
Most visits take under 15 minutes. Here’s the full arc, start to finish.
How to prepare
No fasting required. Take any vitamin D supplements as normal — they do not need to be held before the draw. If you take very high-dose vitamin D (over 10,000 IU/day) for medical reasons, mention it at check-in so the result can be interpreted in context.
During your visit
A single small blood draw — one tube, completed in about 5 minutes. Most clients are in and out of the lab in 10 to 15 minutes total. Vitamin D testing is included in the Comprehensive Wellness Panel ($279) alongside CBC, CMP, lipid, A1C, thyroid, iron, and hormone markers — useful if you want a fuller picture in one draw.
Getting your results
The 25-hydroxy vitamin D result posts to your secure online portal in 24 to 72 hours, reported in ng/mL with the lab’s reference range. Most US labs target 30 to 100 ng/mL as the optimal range. We can fax results to any provider at no additional charge — useful if you want a primary-care or functional-medicine practitioner to recommend a specific supplementation protocol.
Confidential
Your results never go through your insurance carrier.
Transparent
Price you see is price you pay.
Fast
Most results in 24–72 hours through our portal.
Doctor’s order
Included as part of every visit. No referral needed.
FAQ
Vitamin D Test — what people ask
Specific questions about the vitamin d test. For anything not covered, call 571-500-7030.
What is a normal vitamin D level?
Most US labs target 30 to 100 ng/mL of 25-hydroxy vitamin D as the optimal range. 20 to 30 ng/mL is considered insufficient; below 20 ng/mL is deficient; above 100 ng/mL is sometimes flagged as potentially excessive (though toxicity is uncommon below 150 ng/mL). Your physician can recommend a specific target based on your situation.
How long does vitamin D supplementation take to raise my level?
Most adults see meaningful increases within 8 to 12 weeks of starting a daily vitamin D3 supplement. Re-test at 8 to 12 weeks after starting or changing your dose so you can confirm the dose is sufficient. Levels stabilize in 3 to 6 months on a consistent dose.
Should I get vitamin D tested in winter or summer?
Either works, but winter testing usually reveals the lowest level of the year — useful if you want a true baseline. Many adults supplement through winter and stop or reduce in summer; testing both seasons over a year gives the most complete picture. Northern Virginia winters produce very little vitamin D from sunlight even on sunny days.
You might also need
Other blood work tests
Other tests our Chantilly neighbors commonly add to a visit.
Annual Check-Up Panel
CBC, CMP, lipid panel and thyroid screen — the full picture for your annual physical.
Complete Blood Count (CBC)
Measures red and white blood cells, hemoglobin, hematocrit and platelets — a baseline blood-health screen.
Comprehensive Metabolic Panel (CMP)
14 markers covering kidney function, liver enzymes, glucose, electrolytes and protein levels.
Service area
We serve these communities
From our Chantilly lab near Westfields, we serve Centreville, Fairfax, Herndon, and the wider Fairfax County area.
Book your vitamin d test today.
Walk in or reserve a time online. Most visits take under 15 minutes.