85306 Clot inhibit prot s free
Also known as: free protein S, protein S free antigen
Measurement of free protein S antigen in plasma using immunoassay to quantify unbound (free) protein S fraction with functional anticoagulant activity.
In Plain Language
free protein S level; active anticlotting protein S
Clinical Context
More specific than total protein S for thrombophilia evaluation; low free protein S increases thrombotic risk and warrants anticoagulation in some cases.
RVU Information
CPT 85306 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 85306?
CPT 85306 (Clot inhibit prot s free) is a Pathology & Lab code. Measurement of free protein S antigen in plasma using immunoassay to quantify unbound (free) protein S fraction with functional anticoagulant activity.
Who uses CPT code 85306?
CPT 85306 is used by Clinical Pathology, Coagulation, Hematology. More specific than total protein S for thrombophilia evaluation; low free protein S increases thrombotic risk and warrants anticoagulation in some cases.
When is CPT 85306 used?
More specific than total protein S for thrombophilia evaluation; low free protein S increases thrombotic risk and warrants anticoagulation in some cases.
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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.