84433 Asy thiopurin s-mthyltrnsfrs
Also known as: TPMT activity, thiopurine methyltransferase, pharmacogenetic test
Quantitative assay of thiopurine S-methyltransferase (TPMT) enzyme activity, measuring this drug metabolism enzyme.
In Plain Language
drug allergy risk test
Clinical Context
Pharmacogenetic testing before thiopurine therapy (azathioprine, 6-mercaptopurine); deficient activity increases toxicity risk.
RVU Information
CPT 84433 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 84433?
CPT 84433 (Asy thiopurin s-mthyltrnsfrs) is a Pathology & Lab code. Quantitative assay of thiopurine S-methyltransferase (TPMT) enzyme activity, measuring this drug metabolism enzyme.
Who uses CPT code 84433?
CPT 84433 is used by Clinical Chemistry, Pharmacology, Molecular Pathology. Pharmacogenetic testing before thiopurine therapy (azathioprine, 6-mercaptopurine); deficient activity increases toxicity risk.
When is CPT 84433 used?
Pharmacogenetic testing before thiopurine therapy (azathioprine, 6-mercaptopurine); deficient activity increases toxicity risk.
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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.