85305 Clot inhibit prot s total
Also known as: total protein S, protein S total antigen
Measurement of total protein S antigen in plasma using immunoassay to quantify both free and bound protein S levels independent of functional activity.
In Plain Language
protein S total level; anticlotting protein S measurement
Clinical Context
Evaluates protein S deficiency contributing to thrombophilia; requires correlation with free protein S for accurate assessment due to binding protein C4b.
RVU Information
CPT 85305 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 85305?
CPT 85305 (Clot inhibit prot s total) is a Pathology & Lab code. Measurement of total protein S antigen in plasma using immunoassay to quantify both free and bound protein S levels independent of functional activity.
Who uses CPT code 85305?
CPT 85305 is used by Clinical Pathology, Coagulation, Hematology. Evaluates protein S deficiency contributing to thrombophilia; requires correlation with free protein S for accurate assessment due to binding protein C4b.
When is CPT 85305 used?
Evaluates protein S deficiency contributing to thrombophilia; requires correlation with free protein S for accurate assessment due to binding protein C4b.
Track This Code in RVU Edge
Log procedures, calculate wRVUs, and benchmark against national data — all in one app.
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.