Also known as: Activated Partial Thromboplastin Time (aPTT)
On your lab requisition: Labcorp “PTT, Activated” (test no. 005207)BioReference “PTT (Partial Thromboplastin Time)” (test code 0139-6)
The short answer
Measures the intrinsic clotting pathway — used to monitor heparin therapy and screen for clotting factor deficiencies, measured from a standard blood draw. At TestWell it costs $24.99 plus a $6 lab processing fee, needs no fasting, and results post in 1–3 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$95
cash pay
Other Labs
$35
+ lab fees
TestWell
$24.99
+ $6 lab processing fee
Activated Partial Thromboplastin Time (aPTT) measures how long it takes blood to clot through the intrinsic and common coagulation pathways. It's the standard test for monitoring patients on unfractionated heparin therapy, evaluating unexplained bleeding or bruising, screening for clotting factor deficiencies (including hemophilia A and B, von Willebrand disease, and Factor XI deficiency), and assessing for lupus anticoagulant antibodies. aPTT is often ordered alongside PT/INR for a complete coagulation workup, especially before surgery.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days · typical; varies by lab and draw day
Performed At
Quest or Labcorp
1 biomarker tested
Your Activated Partial Thromboplastin Time (aPTT) 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 1–3 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. If you're on heparin or other anticoagulants, take your dose at your normal time and note when you took it for the lab.
TestWell orders the same Activated Partial Thromboplastin Time (aPTT) the labs run for doctors' offices, so you can walk into any of these labs with our requisition — no doctor's visit, a licensed physician authorizes the order, and most patient service centers take walk-ins. The table shows each lab's own test code, the name printed on the requisition, what the lab charges on its own consumer site, and the price through TestWell at that lab (plus one $6 fee per order).
| Lab | Test code | On the requisition | Lab's own site | Through TestWell |
|---|---|---|---|---|
| Quest Diagnostics | test code 763 | “Activated Partial Thromboplastin Time (aPTT)” | not sold direct | $24.99 + $6 |
| Labcorp | test no. 005207 | “PTT, Activated” | not sold direct | $24.99 + $6 |
| BioReference (New York & New Jersey) | test code 0139-6 | “PTT (Partial Thromboplastin Time)” | n/a | $19.99 + $6 |
You choose the lab at checkout; the requisition is written for that lab and arrives by email within minutes. New York and New Jersey orders draw at BioReference. Lab-direct prices are read from the labs' public pages and re-checked regularly.
Where to get it near you: patient service centers by state and city · search by ZIP code
An Activated Partial Thromboplastin Time (aPTT) test costs $24.99 at TestWell — $30.99 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 $95.00 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 or Labcorp) | $24.99 | $30.99 | Includes the one $6 lab processing fee, charged once per order |
| TestWell (drawn at BioReference — New York & New Jersey) | $19.99 | $25.99 | New York and New Jersey orders route to BioReference; Quest Health and Labcorp OnDemand don't take self-ordered draws in those states |
| Hospital outpatient lab, self-pay (typical) | $95.00 | $95.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 763 · Labcorp test no. 005207 · BioReference code 0139-6. 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
Activated Partial Thromboplastin Time (aPTT) test results are typically ready in 1–3 business days after your draw at Quest or Labcorp. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation.
No, fasting is not required for an Activated Partial Thromboplastin Time (aPTT) test — you can eat normally and book any time of day. If you're on heparin or other anticoagulants, take your dose at your normal time and note when you took it for the lab.
Order the Activated Partial Thromboplastin Time (aPTT) test online from TestWell for $24.99 (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 or Labcorp 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 1–3 business days.
The Activated Partial Thromboplastin Time (aPTT) test is Quest Diagnostics test code 763, Labcorp test number 005207 ("PTT, Activated"), BioReference code 0139-6 ("PTT (Partial Thromboplastin Time)"). TestWell orders it under those codes for $24.99 at Quest, Labcorp or BioReference — no doctor's visit or insurance required, results in 1–3 business days. Codes verified against the labs' catalogs in 2026.
TestWell Price
$24.99
+ $6 lab processing fee at checkout
Get notified when this test becomes available
No insurance needed · HIPAA compliant
Frequently ordered together
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