--- title: Methylmalonic Acid (MMA) Test type: test id: methylmalonic-acid url: "https://www.test-well.com/tests/methylmalonic-acid" price_usd: 49.99 lab_fee_usd: 6 all_in_usd: 55.99 cpt: 83921 category: Vitamins & Nutrients sample: Blood draw fasting_required: false results_in: "5–12 business days" labs: - Quest - Labcorp - BioReference orderable: true reviewed_at: 2026-09-14 order_url: "https://www.test-well.com/cart?add=methylmalonic-acid&utm_source=ai_agent&utm_medium=markdown" --- # Methylmalonic Acid (MMA) Test > The confirmatory test for vitamin B12 deficiency — MMA rises early, before B12 levels look clearly low, measured from a standard blood draw. At TestWell it costs $49.99 plus a $6 lab fee, needs no fasting, and results post in 5–12 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp. ## Key facts | Fact | Value | | --- | --- | | Price | $49.99 + $6 lab processing fee per order ($55.99 all-in for this test alone) | | CPT code | 83921 | | Sample | Blood draw | | Fasting | Not required | | Results | 5–12 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 Methylmalonic Acid (MMA) test tell you? The confirmatory test for vitamin B12 deficiency — MMA rises early, before B12 levels look clearly low. Methylmalonic acid (MMA) is the most specific marker for functional vitamin B12 deficiency. When your cells lack usable B12, MMA accumulates in the blood — often before serum B12 drops clearly below range. That makes this test the standard follow-up when a B12 result is borderline, when symptoms (fatigue, numbness or tingling, memory changes) persist despite a 'normal' B12, or when you're monitoring a known deficiency. It's frequently interpreted alongside homocysteine: MMA elevated with high homocysteine points at B12; homocysteine high with normal MMA points at folate. MMA is measured by LC-MS/MS, a specialty assay, so results take longer than routine labs. **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 - [Methylmalonic Acid](https://www.test-well.com/biomarkers/methylmalonic-acid) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $49.99 | $55.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | Labcorp | $49.99 | $55.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | BioReference (NY & NJ) | $54.99 | $60.99 | 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 Methylmalonic Acid (MMA) test cost? A Methylmalonic Acid (MMA) test costs $49.99 at TestWell — $55.99 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 $180.00 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) | $49.99 | $55.99 | Includes the one $6 lab processing fee, charged once per order | | Hospital outpatient lab, self-pay (typical) | $180.00 | $180.00 | Reference figure; hospital charges vary widely by facility and are often higher | Lab test codes: Quest test code 34879 · Labcorp test no. 706961 · BioReference code 0349-1. ## How do you prepare? No fasting required. This is a specialty send-out assay — allow extra time for results compared to routine bloodwork. ## Related conditions - Vitamin deficiency (E56.9) - Nutrient deficiency (E63.9) ## Common questions about the Methylmalonic Acid (MMA) test ### How long do Methylmalonic Acid (MMA) results take? Most Methylmalonic Acid (MMA) results are available in 5–12 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 Methylmalonic Acid (MMA)? 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 Methylmalonic Acid (MMA) cost without insurance? On TestWell, the Methylmalonic Acid (MMA) is $49.99. Quest Direct lists comparable tests at $99. Walk-in hospital labs typically bill $180 or more without insurance. Insurance is not required — pay one all-in price. ### Do I need to fast before the Methylmalonic Acid (MMA)? No fasting required for the Methylmalonic Acid (MMA). No fasting required. This is a specialty send-out assay — allow extra time for results compared to routine bloodwork. ### Where can I get the Methylmalonic Acid (MMA) done? The Methylmalonic Acid (MMA) 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=methylmalonic-acid&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 5–12 business days with reference ranges and flags. ## Related - [Methylmalonic Acid (MMA) and B12 Deficiency: Why the Test Is Ordered and How to Read It](https://www.test-well.com/guides/methylmalonic-acid-b12-deficiency) - [Comprehensive B12 Deficiency Panel](https://www.test-well.com/tests/b12-deficiency-panel) — 3 tests · $79.99 - [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/methylmalonic-acid 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.