--- title: Lamotrigine Level (Lamictal) Test type: test id: lamotrigine url: "https://www.test-well.com/tests/lamotrigine-level" price_usd: 119.99 lab_fee_usd: 6 all_in_usd: 125.99 cpt: 80175 category: General Health sample: Blood draw fasting_required: false results_in: "3–5 business days" labs: - Quest orderable: false reviewed_at: 2026-10-19 --- # Lamotrigine Level (Lamictal) Test > Lamotrigine Level (Lamictal) measures Lamotrigine, Serum from a standard blood draw. At TestWell it costs $119.99 plus a $6 lab processing fee, needs no fasting, and results post in 3–5 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest. **Also known as:** Lamictal Level, Lamotrigine Blood Test, Lamotrigine Serum Level, Lamictal Blood Test **Not orderable yet.** This test is listed for information; TestWell is finishing lab registration and it cannot be added to a cart today. **Before you order** This test measures a medication level; it is not a test for epilepsy or bipolar disorder. If you are having more frequent seizures, a rash, fever, or swollen glands on lamotrigine, contact your prescriber or seek care now rather than waiting for a lab result. ## Key facts | Fact | Value | | --- | --- | | Price | $119.99 + $6 lab processing fee per order ($125.99 all-in for this test alone) | | CPT code | 80175 | | Sample | Blood draw | | Fasting | Not required | | Results | 3–5 business days | | Labs | Quest Diagnostics | | 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 Lamotrigine Level (Lamictal) test tell you? Measures the level of lamotrigine (Lamictal) in your blood — used to check that your dose is in the therapeutic range if you take it for epilepsy or bipolar disorder. A lamotrigine level measures the concentration of the anticonvulsant lamotrigine (brand name Lamictal) in your blood. It is a therapeutic drug monitoring test: the same dose produces very different blood levels in different people, and the level shifts with pregnancy, hormonal contraception, and other medications — valproate roughly doubles it, while carbamazepine, phenytoin, and oestrogen-containing pills lower it. Prescribers use the level to confirm a dose is in the usual therapeutic range (about 2.5–15 mcg/mL by the Quest method), to investigate breakthrough seizures or side effects such as dizziness, double vision, or unsteadiness, and to check adherence. The test is run by LC/MS/MS at Quest Diagnostics and reported in mcg/mL with the laboratory's reference range. Timing matters: a trough level, drawn shortly before your next dose once you have been on a steady dose for about a week, is the number your prescriber expects. Results are for you and your prescriber to review together — do not change your dose based on a level alone. **Clinical use:** Therapeutic drug monitoring of lamotrigine: confirming a dose is in range after a change, during pregnancy or after starting or stopping an interacting drug (valproate, carbamazepine, phenytoin, oestrogen-containing contraception), investigating breakthrough seizures or dose-related side effects, and checking adherence. ## Who should order it? People prescribed lamotrigine for epilepsy or bipolar disorder whose prescriber has asked for a level, who have changed dose or started an interacting medication, who are pregnant or planning pregnancy, or who want a baseline while stable. ## Biomarkers measured - Lamotrigine, Serum ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $119.99 | $125.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | 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 Lamotrigine Level (Lamictal) test cost? A Lamotrigine Level (Lamictal) test costs $119.99 at TestWell — $125.99 all-in, since the $6 lab processing fee is charged once per order and there is no draw or physician fee. Hospital outpatient labs typically bill around $250.00 self-pay. With insurance you pay your plan's negotiated rate against your deductible; TestWell's price is fixed before the draw and HSA/FSA-eligible. | Where you order | Price | One test, all-in | Notes | | --- | --- | --- | --- | | TestWell (drawn at Quest) | $119.99 | $125.99 | Includes the one $6 lab processing fee, charged once per order | | Hospital outpatient lab, self-pay (typical) | $250.00 | $250.00 | Reference figure; hospital charges vary widely by facility and are often higher | Lab test codes: Quest test code 22060 · Labcorp test no. 716944. ## How do you prepare? No fasting required. Draw a trough level: schedule your visit 30–60 minutes before your next lamotrigine dose, after at least 5–7 days on the same dose, and tell the lab when you took your last dose. Keep taking your medication as prescribed. ## Common questions about the Lamotrigine Level (Lamictal) test ### When should a lamotrigine level be drawn? As a trough: 30–60 minutes before your next dose, once you have taken the same dose for at least 5–7 days so the level has reached steady state. A level drawn a few hours after a dose reads higher and is hard to compare with the usual range. Tell the lab when you took your last dose. ### What is a normal lamotrigine level? The reference range by the Quest LC/MS/MS method is about 2.5–15 mcg/mL. People do well across that range and some outside it; the right level is the one at which you are seizure-free or stable without side effects, which is why prescribers read it alongside how you are doing rather than as a pass/fail number. ### Why does my lamotrigine level change if my dose hasn't? Lamotrigine is cleared by glucuronidation, which other drugs and hormones speed up or slow down. Valproate roughly doubles the level; carbamazepine, phenytoin, rifampin, and oestrogen-containing contraception lower it; pregnancy can lower it substantially by the third trimester. Missed doses and timing of the draw also move it. ### Can I use the prescription my doctor wrote for Quest? You do not need it. Every TestWell order includes a physician authorization from our clinical network, which is the order Quest requires. You can download your result as a PDF from your portal and send it to your prescriber. If your insurance covers the test, taking your doctor's own order directly to Quest may be cheaper than paying cash. ### How long does it take to get Lamotrigine Level (Lamictal) test results? Lamotrigine Level (Lamictal) test results are typically ready in 3–5 business days after your draw at Quest. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation. ### Do I need to fast, or can I eat before a Lamotrigine Level (Lamictal) test? No, fasting is not required for a Lamotrigine Level (Lamictal) test — you can eat normally and book any time of day. Draw a trough level: schedule your visit 30–60 minutes before your next lamotrigine dose, after at least 5–7 days on the same dose, and tell the lab when you took your last dose. Keep taking your medication as prescribed. ### Where can I get a Lamotrigine Level (Lamictal) test near me without a doctor? Order the Lamotrigine Level (Lamictal) test online from TestWell for $119.99 (plus a $6 per-order lab processing fee) — no doctor's visit, referral or insurance needed. A licensed physician authorizes the order, then you walk into any Quest patient service center near you for the draw (the lab locator on our site lists the closest ones by ZIP code), and results arrive in 3–5 business days. ### What is the CPT code for a Lamotrigine Level (Lamictal) test? CPT 80175. That is the billing code Quest, Labcorp and hospital laboratories all use for a Lamotrigine Level (Lamictal) test, so it is the number to match on an explanation of benefits, a doctor's order or a price list — the same code, the same test, whichever lab draws it. You do not need the code to order: TestWell sells the Lamotrigine Level (Lamictal) test for $119.99 with the physician order included, no insurance required, and results in 3–5 business days. ### What are the Quest and Labcorp test codes for a Lamotrigine Level (Lamictal) test? The Lamotrigine Level (Lamictal) test is Quest Diagnostics test code 22060, Labcorp test number 716944 (CPT 80175). TestWell orders it under those codes for $119.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 3–5 business days. Codes verified against the labs' catalogs in 2026. ## How to order This test is not orderable yet. 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Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/lamotrigine-level 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.