--- title: Vitamin C (Ascorbic Acid) Test type: test id: vitamin-c url: "https://www.test-well.com/tests/vitamin-c" price_usd: 44.99 lab_fee_usd: 6 all_in_usd: 50.99 cpt: 82180 category: Vitamins & Nutrients sample: Blood draw fasting_required: true results_in: "3–7 business days" labs: - Quest - Labcorp - BioReference orderable: true reviewed_at: 2026-09-14 order_url: "https://www.test-well.com/cart?add=vitamin-c&utm_source=ai_agent&utm_medium=markdown" --- # Vitamin C (Ascorbic Acid) Test > Measures ascorbic acid levels — important for immune function, collagen production, and antioxidant protection, measured from a standard blood draw. At TestWell it costs $44.99 plus a $6 lab fee, requires an 8–12 hour fast, and results post in 3–7 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp. ## Key facts | Fact | Value | | --- | --- | | Price | $44.99 + $6 lab processing fee per order ($50.99 all-in for this test alone) | | CPT code | 82180 | | Sample | Blood draw | | Fasting | Yes — 8–12 hours | | Results | 3–7 business days | | Labs | Quest Diagnostics, Labcorp, BioReference (NY & NJ) | | Biomarkers measured | 1 | | Physician authorization | Included — no doctor's visit, referral or insurance needed | | Payment | Card, HSA or FSA; cash-pay only (no insurance billing) | ## What does the Vitamin C (Ascorbic Acid) test tell you? Measures ascorbic acid levels — important for immune function, collagen production, and antioxidant protection. Vitamin C is a water-soluble vitamin and powerful antioxidant essential for collagen synthesis, wound healing, iron absorption, and immune function. Severe deficiency causes scurvy, while mild deficiency can cause fatigue, poor wound healing, and weakened immunity. Smokers, those with limited fruit and vegetable intake, and people with certain GI conditions are at higher risk for deficiency. **Clinical use:** 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. ## Who should order it? Anyone with restrictive diets (vegan, low-fat, low-carb), malabsorption conditions, fatigue, hair loss, mood changes, or currently supplementing and wanting to verify dosing. ## Biomarkers measured - [Vitamin C](https://www.test-well.com/biomarkers/vitamin-c) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $44.99 | $50.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | Labcorp | $44.99 | $50.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | BioReference (NY & NJ) | $21.99 | $27.99 | New York and New Jersey orders route here automatically | Rhode Island is not served. Prices are identical online and in the lab; no draw fee or physician fee is added. ## How much does a Vitamin C (Ascorbic Acid) test cost? A Vitamin C (Ascorbic Acid) 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 $49.00 at Quest Health and $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 or Labcorp) | $44.99 | $50.99 | Includes the one $6 lab processing fee, charged once per order | | Quest Health (Quest Diagnostics' own site) | $49.00 | $49.00 | [list price checked 2026-09-12](https://www.questhealth.com/product/vitamin-c-test/929M.html) | | Labcorp OnDemand (Labcorp's own site) | $59.00 | $59.00 | [list price checked 2026-09-12](https://www.ondemand.labcorp.com/lab-tests/vitamin-c-test) | | 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 929 · Labcorp test no. 001805 · BioReference code 0291-5. ## How do you prepare? Fasting for 10–12 hours recommended. Avoid vitamin C supplements for 24 hours before. ## Related conditions - Vitamin deficiency (E56.9) - Nutrient deficiency (E63.9) ## Common questions about the Vitamin C (Ascorbic Acid) test ### How long do Vitamin C (Ascorbic Acid) results take? Most Vitamin C (Ascorbic Acid) results are available in 3–7 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. ### What sample is collected for the Vitamin C (Ascorbic Acid)? Blood draw. Sample is collected at a Quest, Labcorp, or BioReference patient service center near you, or via at-home phlebotomy where available. ### How much does the Vitamin C (Ascorbic Acid) cost without insurance? On TestWell, the Vitamin C (Ascorbic Acid) 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. ### Do I need to fast before the Vitamin C (Ascorbic Acid)? Yes — fasting for 10–12 hours recommended. Avoid vitamin C supplements for 24 hours before. Following the prep instructions gives you the most accurate result. ### Where can I get the Vitamin C (Ascorbic Acid) done? The Vitamin C (Ascorbic Acid) 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. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=vitamin-c&utm_source=ai_agent&utm_medium=markdown 2. Create an account or sign in, confirm your state and preferred lab, pay by card, HSA or FSA. 3. A licensed physician authorizes the order (usually within minutes); the requisition arrives by email. 4. Walk into any Quest Diagnostics, Labcorp, BioReference (NY & NJ) patient service center — no appointment needed at most sites. 5. Results post to your TestWell portal in 3–7 business days with reference ranges and flags. ## Related - [Biotin (Vitamin B7)](https://www.test-well.com/tests/biotin) — $259.99 - [Calcium](https://www.test-well.com/tests/calcium) — $26.99 - [Copper](https://www.test-well.com/tests/copper) — $31.99 - [CoQ10 (Coenzyme Q10)](https://www.test-well.com/tests/coq10-coenzyme-q10) — $74.99 - [Folate (Vitamin B9)](https://www.test-well.com/tests/folate) — $32.99 - [All Vitamins & Nutrients tests](https://www.test-well.com/tests/category/vitamins-nutrients) - [Full test directory](https://www.test-well.com/tests/directory) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-14. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/vitamin-c Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.