2025 CPT code 3555F
(Active) Effective Date: N/A Revision Date: N/A Diagnostic - Diagnostic/Screening Processes or Results Category II Codes Feed
International Normalized Ratio (INR) measurement performed.
Category II codes do not utilize modifiers.
Medical necessity for INR testing is established when a patient is prescribed anticoagulant medication or has a condition that requires monitoring of blood clotting time (e.g. AFIB, mechanical heart valve, DVT, pulmonary embolism).The frequency of testing is determined by the individual patient's clinical situation and risk factors.
The clinical responsibility lies with the physician or qualified healthcare professional who orders and interprets the INR test results. This includes patient education on the importance of regular INR monitoring and medication management.
In simple words: This code means a blood test was done to see how long it takes your blood to clot. This test is often used to check how well blood-thinning medicine is working if you have a condition like atrial fibrillation.
This CPT code reports the performance of an International Normalized Ratio (INR) measurement, a blood test used to determine the time it takes for blood to clot.It's commonly used to monitor the efficacy of anticoagulant medications in patients with conditions like atrial fibrillation (AFIB).
Example 1: A patient with atrial fibrillation (AFIB) is on warfarin therapy.Regular INR testing (using code 3555F) is crucial to ensure the warfarin dosage is appropriately adjusted to maintain therapeutic anticoagulation while minimizing the risk of bleeding complications., A patient with a mechanical heart valve requires ongoing INR monitoring (using code 3555F) to prevent thromboembolic events.Regular testing is essential to optimize the anticoagulation strategy and minimize the risk of stroke or other complications., A patient presents with a deep vein thrombosis (DVT) and is initiated on anticoagulant therapy.Serial INR measurements (using code 3555F) help monitor the effectiveness of the treatment and adjust the medication dose as necessary to ensure the patient's safety and clinical outcome.
* Patient's medical history, including diagnosis and medication list.* Date and time of INR testing.* INR test result.* Physician's interpretation of the INR result and any adjustments made to medication.* Any clinical notes explaining the rationale for INR testing and its implications.
** Code 3555F is a Category II CPT code, used for performance measurement and quality improvement initiatives. It is not used for billing purposes, and does not have a relative value unit (RVU) or associated reimbursement.
- RVU: Category II codes do not have relative value units.
- Global Days: Not applicable to Category II codes.
- Payment Status: Active
- Modifier TC rule: Not applicable to Category II codes.
- Fee Schedule: Category II codes do not have fee schedules.
- Specialties:Cardiology, Hematology, Internal Medicine, Family Medicine
- Place of Service:Office, Hospital (Inpatient and Outpatient), Laboratory