Syphilis Antibody Test, Reverse Sequence at Quest Diagnostics: test code, price, and how to order
Quest Health, Quest Diagnostics's own consumer site, does not sell the Syphilis Antibody Test, Reverse Sequence (we last matched its catalog on Sep 12, 2026), so there is no walk-up consumer price at Quest Diagnostics itself. Two routes get it drawn there: a doctor's order, billed to insurance or at the lab's self-pay rate, or TestWell — $49.99 plus one $6 lab processing fee, $55.99 all-in for one test — where a licensed physician authorizes the order and the Quest Diagnostics requisition arrives by email. The collection, the Quest Diagnostics laboratory and the result are the same either way.
Syphilis Antibody Test, Reverse Sequence at Quest Diagnostics at a glance
| Quest Diagnostics test code | 90349 |
|---|---|
| On the requisition | “Syphilis Antibody Cascading Reflex” · CPT 86780 |
| Quest Health price (Quest Diagnostics's own site) | Not sold to consumers on Quest Health (catalog matched Sep 12, 2026) |
| Through TestWell, drawn at Quest Diagnostics | $49.99 + $6 lab processing fee (once per order) = $55.99 for one test |
| Sample · fasting · results | Blood draw · no fasting · 2–5 business days |
Quest Health does not list this test, so the TestWell price is the self-ordered price at Quest Diagnostics; a doctor-ordered draw is billed through insurance or at the lab's self-pay rate. We re-match Quest Health's catalog periodically; if the lab starts selling this test direct, its price will appear here.
Two ways to get a Syphilis Antibody Test, Reverse Sequence at Quest Diagnostics
- With a doctor's order. Your clinician sends a requisition to Quest Diagnostics; the lab bills your insurance and your share depends on your plan and deductible. Ask for the Quest Diagnostics test code 90349 if you want the same test.
- Through TestWell. $49.99 plus one $6 fee per order. A licensed physician in our network authorizes the order, the Quest Diagnostics requisition arrives by email (usually within minutes), you walk into any Quest Diagnostics patient service center, and results post to your portal in 2–5 business days. Add tests to the same draw without another fee.
Quest Health, Quest Diagnostics's own consumer ordering site, did not list the Syphilis Antibody Test, Reverse Sequence when we last matched its catalog (Sep 12, 2026) — so there is no “buy it on the lab's site” route for this test.
How to walk into Quest Diagnostics with a TestWell order
- Add the Syphilis Antibody Test, Reverse Sequence to your cart, choose Quest Diagnostics at checkout, and pay — a physician authorizes the order, usually within minutes.
- Open the emailed requisition on your phone (or print it) and bring a photo ID.
- Walk into any Quest Diagnostics patient service center; most take walk-ins, and an appointment on Quest Diagnostics's site shortens the wait.
- Results post to your TestWell portal in 2–5 business days, with reference ranges and a share link for your clinician.
In New York or New Jersey? Neither Quest nor Labcorp takes self-ordered draws there; TestWell routes those orders to BioReference automatically.
Where to get a Syphilis Antibody Test, Reverse Sequence at Quest Diagnostics
Quest Diagnostics runs 418 patient service centers across the 45 metros TestWell tracks (snapshot Oct 10, 2026); the TestWell requisition is accepted at all of them. Metros with the most Quest Diagnostics sites:
- Quest Diagnostics in Phoenix, AZ24 sites
- Quest Diagnostics in Tucson, AZ14 sites
- Quest Diagnostics in Baltimore, MD12 sites
- Quest Diagnostics in Boston, MA12 sites
- Quest Diagnostics in Dallas, TX12 sites
- Quest Diagnostics in Denver, CO12 sites
- Quest Diagnostics in Fort Lauderdale, FL12 sites
- Quest Diagnostics in Fort Worth, TX12 sites
- Quest Diagnostics in Houston, TX12 sites
- Quest Diagnostics in Indianapolis, IN12 sites
- Quest Diagnostics in Jacksonville, FL12 sites
- Quest Diagnostics in Las Vegas, NV12 sites
What the Quest Diagnostics Syphilis Antibody Test, Reverse Sequence result covers
3 markers: Treponema pallidum Antibody (Total), RPR with Titer (reflex, if reactive), Second Treponemal Test (reflex, if discordant). The treponemal-first (reverse-sequence) syphilis algorithm — a total antibody screen with automatic reflex to RPR titer and a second confirmatory test. Quest test code 90349. Full test details, reference ranges and reviews.
Frequently asked questions
- How much is a Syphilis Antibody Test, Reverse Sequence at Quest Diagnostics?
- Quest Health, Quest Diagnostics's own consumer site, does not sell the Syphilis Antibody Test, Reverse Sequence (we last matched its catalog on Sep 12, 2026), so there is no walk-up consumer price at Quest Diagnostics itself. Two routes get it drawn there: a doctor's order, billed to insurance or at the lab's self-pay rate, or TestWell — $49.99 plus one $6 lab processing fee, $55.99 all-in for one test — where a licensed physician authorizes the order and the Quest Diagnostics requisition arrives by email. The collection, the Quest Diagnostics laboratory and the result are the same either way.
- What is the Quest Diagnostics test code for a Syphilis Antibody Test, Reverse Sequence?
- Quest Diagnostics test code 90349. On a Quest Diagnostics requisition the test is printed as "Syphilis Antibody Cascading Reflex", billing code CPT 86780. If you are holding a doctor's order, that is the line to look for; a TestWell requisition carries the same code.
- Can I walk into Quest Diagnostics for a Syphilis Antibody Test, Reverse Sequence without a doctor?
- Yes, with a requisition. Quest Diagnostics patient service centers draw what a requisition orders; they do not write orders. You can get one from your doctor, or order through TestWell ($49.99 + $6 fee), where a licensed physician in our network authorizes the order and the Quest Diagnostics requisition arrives by email, usually within minutes. Quest Health does not list this test, so TestWell is the self-ordered route at Quest Diagnostics. New York and New Jersey do not allow self-ordered draws at Quest or Labcorp; TestWell orders from those states route to BioReference instead.
- Do I need an appointment at Quest Diagnostics?
- Most Quest Diagnostics patient service centers take walk-ins, and an appointment on Quest Diagnostics's site shortens the wait. Bring a photo ID and the emailed requisition (on your phone is fine). No fasting is required for this test. No fasting required. Treponemal antibodies typically become detectable 3–6 weeks after exposure; a negative result soon after a possible exposure should be repeated.
- How long do Quest Diagnostics Syphilis Antibody Test, Reverse Sequence results take?
- Results post to your TestWell portal in 2–5 business days after the draw, with reference ranges and the option to share them with your clinician. Quest Diagnostics runs the sample in its own CLIA-certified laboratory whichever way it was ordered, so the result and the turnaround are the same as a doctor-ordered Syphilis Antibody Test, Reverse Sequence.
- Is a Syphilis Antibody Test, Reverse Sequence cheaper at Quest Diagnostics or Labcorp?
- Through TestWell this test is drawn at Quest Diagnostics only ($49.99 + $6 fee); it is not offered at Labcorp. Quest Health does not list it for consumers.
- Can I buy a Syphilis Antibody Test, Reverse Sequence on Quest Health?
- Not as of our last catalog match (Sep 12, 2026) — Quest Health did not list the Syphilis Antibody Test, Reverse Sequence among the tests it sells to consumers. A doctor's order or a TestWell order ($49.99 + $6 fee) are the routes, and both are drawn at the same Quest Diagnostics patient service centers and run in the same Quest Diagnostics laboratory under test code 90349.