2025 CPT code 85730
Partial Thromboplastin Time (PTT) test on plasma or whole blood.
Modifiers may be applicable depending on the clinical scenario and payer guidelines.
Medical necessity for a PTT test is established when evaluating unexplained bleeding or clotting problems, monitoring anticoagulant therapy (e.g., heparin), pre-surgical screening, or when specific bleeding disorders are suspected based on clinical findings.
Laboratory personnel perform the PTT test by analyzing a patient's blood sample using specialized coagulation instruments. These instruments detect clot formation by measuring changes in light scattering (nephelometry) as the sample clots. Portable devices using whole blood are also available for bedside testing.
In simple words: The PTT test measures how long it takes your blood to clot. It helps doctors find bleeding problems or check if blood thinners are working correctly.
The Partial Thromboplastin Time (PTT), also known as Activated Partial Thromboplastin Time (aPTT), evaluates the intrinsic and common pathways of the coagulation cascade. It measures the time it takes for a blood clot to form after reagents are added to a plasma or whole blood sample. This test is used to monitor heparin therapy, diagnose bleeding disorders, and evaluate the coagulation system.
Example 1: A patient presents with unexplained bruising and prolonged bleeding after minor injuries. A PTT test is ordered to assess their clotting ability and screen for potential bleeding disorders., A patient is receiving heparin therapy to treat a blood clot. Regular PTT tests are performed to monitor the effectiveness of the heparin and adjust the dosage to maintain a therapeutic range., A patient is scheduled for surgery. A PTT test is included in pre-operative testing to identify any potential bleeding risks that may complicate the procedure.
Documentation should include the reason for the PTT test, the date and time of blood collection, the method used (plasma or whole blood), the test result in seconds, and any relevant patient history or medications that may affect clotting.
- Specialties:Hematology, Coagulation, Internal Medicine, General Practice, Surgery
- Place of Service:Office, Inpatient Hospital, Outpatient Hospital, Independent Laboratory, etc.