The short answer
Measures retinol levels — essential for vision, immune function, and skin health, measured from a standard blood draw. At TestWell it costs $44.99 plus a $6 lab processing fee, requires an 8–12 hour fast, and results post in 3–5 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest.
Hospital Lab
$150
cash pay
Other Labs
$49
+ lab fees
TestWell
$44.99
+ $6 lab processing fee
Vitamin A (retinol) is a fat-soluble vitamin crucial for vision (especially night vision), immune function, skin health, and cell growth. Both deficiency and excess can cause health problems. Deficiency is more common in developing countries but can occur in people with fat malabsorption conditions, liver disease, or restrictive diets.
Vitamin and nutrient testing identifies deficiencies that can drive fatigue, immune dysfunction, neurological symptoms, and long-term disease risk — and confirms that supplementation is working.
Anyone with restrictive diets (vegan, low-fat, low-carb), malabsorption conditions, fatigue, hair loss, mood changes, or currently supplementing and wanting to verify dosing.
Sample Type
Blood draw
Fasting
Required
Results In
3–5 business days
Performed At
Quest
Your Vitamin A (Retinol) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–5 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you. Already have results? Analyze them with your AI assistant against our physician-reviewed ranges.
Fasting for 8 hours is recommended.
What can throw off this result
Physician-reviewed “Before your test” pages — what each factor does, for how long, and what to do about it.
A Vitamin A (Retinol) test costs $44.99 at TestWell — $50.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Ordered directly from the labs' own consumer sites, the same test lists at $59.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $150.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest) | $44.99 | $50.99 | Includes the one $6 lab processing fee, charged once per order |
| Labcorp OnDemand (Labcorp's own site) | $59.00 | $59.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $150.00 | $150.00 | Reference figure; hospital charges vary widely by facility and are often higher |
14% less than the lower lab-direct list price, for the same draw at the same lab. Lab test codes: Quest test code 921. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Most Vitamin A (Retinol) results are available in 3–5 business days after your specimen arrives at the lab. You'll get an email the moment results are ready, with everything viewable in your TestWell portal.
Blood draw. Sample is collected at a Quest, Labcorp, or BioReference patient service center near you, or via at-home phlebotomy where available.
On TestWell, the Vitamin A (Retinol) is $44.99. Quest Direct lists comparable tests at $49. Walk-in hospital labs typically bill $150 or more without insurance. Insurance is not required — pay one all-in price.
Yes — fasting for 8 hours is recommended. Following the prep instructions gives you the most accurate result.
The Vitamin A (Retinol) is available at Quest patient service centers nationwide. Order online at TestWell, pick your preferred lab, and we'll generate a digital requisition for the location closest to you.
Ordered directly, a Vitamin A (Retinol) test lists at $59.00 at Labcorp OnDemand (prices checked September 2026). TestWell orders the same test at the same Quest patient service centers for $44.99 — $50.99 all-in with the $6 per-order lab processing fee — paid out of pocket at checkout with no insurance, doctor's visit or draw fee; HSA and FSA cards are accepted.
Oral contraceptives and estrogen can change a Vitamin A (Retinol) test result without anything being wrong. Oral contraceptives and estrogen can raise Vitamin A — expected; ferritin often improves because periods are lighter. Each factor is covered on our physician-reviewed "Before your test" pages; when one applies, the fix is usually to remove it and retest.
The CPT code for a Vitamin A (Retinol) test is 84590. You can order it from TestWell for $44.99 — no doctor's visit or insurance required, with results in 3–5 business days.
The Vitamin A (Retinol) test is Quest Diagnostics test code 921 (CPT 84590). TestWell orders it under that code for $44.99 at Quest — no doctor's visit or insurance required, results in 3–5 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$44.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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Vitamin A (Retinol)
$44.99