On your lab requisition: Labcorp “Vitamin K1” (test no. 121200)
The short answer
Measures vitamin K — essential for blood clotting and bone metabolism, measured from a standard blood draw. At TestWell it costs $36.99 plus a $6 lab processing fee, needs no fasting, and results post in 5–7 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$150
cash pay
Other Labs
$59
+ lab fees
TestWell
$36.99
+ $6 lab processing fee
Vitamin K is a fat-soluble vitamin essential for the synthesis of proteins required for blood clotting (coagulation factors) and bone metabolism (osteocalcin). Deficiency can lead to excessive bleeding and may contribute to osteoporosis. This test is particularly important for patients on blood thinners (warfarin), those with malabsorption disorders, and newborns, who have naturally low vitamin K levels.
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
Not required
Results In
5–7 business days
Performed At
Quest or Labcorp
Your Vitamin K 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 5–7 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.
No fasting required. Inform your provider if you are taking blood thinners or vitamin K supplements.
A Vitamin K test costs $36.99 at TestWell — $42.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. 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 or Labcorp) | $36.99 | $42.99 | Includes the one $6 lab processing fee, charged once per order |
| Hospital outpatient lab, self-pay (typical) | $150.00 | $150.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 36585 · Labcorp test no. 121200. 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 K results are available in 5–7 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 K is $36.99. Quest Direct lists comparable tests at $59. Walk-in hospital labs typically bill $150 or more without insurance. Insurance is not required — pay one all-in price.
No fasting required for the Vitamin K. No fasting required. Inform your provider if you are taking blood thinners or vitamin K supplements.
The Vitamin K is available at Quest and Labcorp 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.
The CPT code for a Vitamin K test is 84597. You can order it from TestWell for $36.99 — no doctor's visit or insurance required, with results in 5–7 business days.
The Vitamin K test is Quest Diagnostics test code 36585, Labcorp test number 121200 ("Vitamin K1") (CPT 84597). TestWell orders it under those codes for $36.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 5–7 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$36.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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