Prothrombin Time with INR (PT) and Partial Thromboplastin Time (PTT)
The two core clotting screens, covering both major coagulation pathways in one draw.
Consider this test if:
- Easy bruising, prolonged bleeding, or frequent nosebleeds with no clear cause
- Starting or monitoring an anticoagulant such as warfarin or heparin
- Pre-surgical or pre-procedure clotting assessment
- Liver disease, vitamin K concerns, or a personal or family history of clotting disorders
- Investigating an abnormal clotting result that needs both pathways checked
- HSA/FSA eligible
- Typical results in 1 day · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required. Timing matters if you are on heparin by intermittent injection: the sample should be drawn about one hour before your next dose, and not from an arm with a heparin lock or line. Tell the lab about any anticoagulant or supplement that affects bleeding, since these directly change the result.
Video consult with your Care Team
A 1:1 call to discuss your health.
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What this test is for
PT/INR and aPTT measure how long your blood takes to clot, each probing a different part of the coagulation cascade. PT/INR screens the extrinsic and common pathways and is the standard test for monitoring warfarin therapy; the INR standardizes the result so it reads the same across labs. aPTT screens the intrinsic and common pathways (factors VIII, IX, XI, XII, plus the shared factors) and is used to monitor unfractionated heparin and to investigate unexplained bleeding or clotting. Together they help evaluate easy bruising, prolonged bleeding, abnormal clotting, liver disease, and inherited or acquired clotting factor deficiencies, and they are routinely checked before surgery or a procedure.
This combined panel runs both screens. If you only need warfarin monitoring, the standalone PT/INR is enough; the separate aPTT alone is the right choice for heparin monitoring or an isolated intrinsic-pathway question.
Biomarkers tested
Includes 3 biomarkers
- Specimen
- Platelet-poor plasma
- Method
- Coagulation assay
- Measures
- Time
- Specimen
- Platelet-poor plasma
- Method
- Coagulation assay
- Measures
- Time
- Specimen
- Platelet-poor plasma
- Method
- Coagulation assay
- Measures
- Time
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 1 day
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
pay as you go
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On-demand clinician consults when you need guidance
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AI health coaching to help you act on your results
Year-round medical support, with in-chat clinician escalation
All your health records in one personal vault, with trends and biological age tracking
Early access to new diagnostics and product releases
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost — covering the lab and what it takes to run the service — never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9/mo, and you still pay the lab’s order fee. Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results post to your dashboard once your lab completes them, then a clinician reviews them and your full analysis and personalized action plan (with clear next steps) follow. Turnaround varies by test: specialty assays and at-home kits take longer, and each test shows its expected turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.
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