A4771 Serum clotting time tube
Also known as: clotting tube, bleeding time tube, coagulation tube
A specialized blood collection tube with specific additives that facilitate serum clotting time measurement. Used for coagulation studies and bleeding time tests.
In Plain Language
blood tube for clotting test; bleeding time collection tube
Clinical Context
Used in laboratory medicine for prothrombin time (PT) and activated partial thromboplastin time (aPTT) tests. Contains appropriate clotting activators.
RVU Information
CPT A4771 does not have a physician work RVU assigned by CMS. This is typical for supply, drug, and equipment codes — reimbursement is based on Average Sales Price (ASP), fee schedules, or payer contracts rather than the RVU system.
Billing & Documentation
HCPCS A-codes cover medical supplies, equipment, and transport services. Documentation must establish medical necessity and include a physician order. For durable medical equipment (DME), a Certificate of Medical Necessity (CMN) or detailed written order may be required.
Specialties
Frequently Asked Questions
What is CPT code A4771?
CPT A4771 (Serum clotting time tube) is a A Codes code. A specialized blood collection tube with specific additives that facilitate serum clotting time measurement. Used for coagulation studies and bleeding time tests.
Does Medicare cover A4771?
Medicare coverage for A4771 depends on medical necessity and applicable Local Coverage Determinations (LCDs). Used in laboratory medicine for prothrombin time (PT) and activated partial thromboplastin time (aPTT) tests. Contains appropriate clotting activators. A physician order is typically required.
When is CPT A4771 used?
Used in laboratory medicine for prothrombin time (PT) and activated partial thromboplastin time (aPTT) tests. Contains appropriate clotting activators.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.