85612 Viper venom prothrombin time
Also known as: RVVT, Russell viper venom test, viper PT
Viper venom prothrombin time test uses Russell viper venom to specifically activate Factor X, bypassing Factors V, VII, VIII, and IX to assess common pathway coagulation function.
In Plain Language
Specialized blood clotting test; Lupus anticoagulant screening
Clinical Context
Used to diagnose lupus anticoagulant and other inhibitors affecting the common coagulation pathway. More sensitive than standard PT for certain coagulation disorders.
RVU Information
CPT 85612 does not have a physician work RVU assigned by CMS. Reimbursement for this code is determined by payer-specific fee schedules.
Billing & Documentation
Lab and pathology codes require an order from the treating provider with clinical indication. For molecular pathology and genetic testing, document the specific analytes tested and clinical rationale.
How This Code Compares
This code has a work RVU of 0.00, meaning it does not have a physician work component assigned by CMS. In the Pathology & Lab category, 94% of codes share this characteristic.
Specialties
Frequently Asked Questions
What is CPT code 85612?
CPT 85612 (Viper venom prothrombin time) is a Pathology & Lab code. Viper venom prothrombin time test uses Russell viper venom to specifically activate Factor X, bypassing Factors V, VII, VIII, and IX to assess common pathway coagulation function.
Who uses CPT code 85612?
CPT 85612 is used by Hemostasis/Thrombosis, Hematology, Clinical Pathology. Used to diagnose lupus anticoagulant and other inhibitors affecting the common coagulation pathway. More sensitive than standard PT for certain coagulation disorders.
When is CPT 85612 used?
Used to diagnose lupus anticoagulant and other inhibitors affecting the common coagulation pathway. More sensitive than standard PT for certain coagulation disorders.
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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.