How Much Does Blood Test, Clotting Time Cost?
Also known as: Blood test, clotting time (CPT 85610)
A prothrombin time (PT) and INR blood test measuring how long it takes your blood to clot.
Blood Test, Clotting Time (CPT 85610) costs $4 at Medicare rates.
The rates shown below represent the complete Medicare reimbursement for this service. No separate facility fee applies for this type of procedure.
Patient Guide: Blood Test, Clotting Time
What you need to know before your appointment
What to Expect
A blood sample is drawn from your arm. The test measures clotting time and converts it to an INR number used to monitor blood-thinning medication.
How Long Does It Take?
5-10 minutes for the blood draw
Common Reasons Doctors Order This
Monitoring warfarin (Coumadin) therapy, pre-surgical clotting evaluation, liver disease assessment, bleeding disorder workup
How to Prepare
No fasting required. Take your blood thinner medication at your usual time unless told otherwise. Tell the lab about all medications.
Procedures Commonly Done Together
These procedures are frequently performed alongside Blood test, clotting time
How to Reduce Your Cost for Blood test, clotting time
Practical tips that can save you hundreds or thousands of dollars
- 1 Ask about cash-pay discounts
Many hospitals and clinics offer 20-40% discounts for self-pay patients. Always ask before scheduling.
- 2 Compare facility vs. office setting costs
Some procedures cost significantly less in an office setting than a hospital. Ask your provider about options.
- 3 Shop around — costs vary significantly
Costs can vary 2-3x between providers in the same city. Get quotes from multiple facilities.
Related Procedures
Similar procedures in the same category or body system
Frequently Asked Questions
How much does Blood test, clotting time cost?
The Medicare facility rate for Blood test, clotting time is $4. Commercial insurance rates typically range from 150% to 250% of Medicare (varies by plan).
How much does Blood test, clotting time cost without insurance?
Without insurance, the cost of Blood test, clotting time can range from 150% of Medicare to 500% of Medicare depending on the facility. Many hospitals and clinics offer self-pay discounts of 20-40% off their chargemaster price. Always ask about cash pricing before your visit.
Does insurance cover Blood test, clotting time?
Most commercial health insurance plans and Medicare cover Blood test, clotting time when ordered by a physician for a medically necessary reason. Your out-of-pocket cost depends on your plan's deductible, copay/coinsurance structure, and whether you use an in-network provider. Check with your insurance company before scheduling to confirm coverage and get a cost estimate.
Why does the cost vary so much by location?
Medicare adjusts payments using Geographic Practice Cost Indices (GPCIs) that reflect local differences in physician work costs, practice expenses, and malpractice insurance. Manhattan, San Francisco, and other high-cost areas pay significantly more than rural regions. Commercial insurers follow similar geographic patterns.