Summary & Overview
CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score
CPT code 0541U designates a Proprietary Laboratory Analyses (PLA) test: the HDL Reverse Cholesterol Transport Panel with pCAD Score from Quest Diagnostics®. The assay measures cholesterol efflux capacity by quantifying five proteins bound to HDL using liquid chromatography–mass spectrometry/mass spectrometry (LC–MS/MS) and reports a predicted coronary artery disease (pCAD) score. This specialized, single-manufacturer test is intended to augment cardiovascular risk assessment beyond traditional lipid panels.
Key national payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical purpose and laboratory methodology of the test, payer coverage landscape, common billing considerations (including typical modifiers), and the service settings where the test is performed. The publication summarizes benchmarks and policy-relevant issues for PLA-coded laboratory diagnostics, clarifies coding semantics for 0541U, and provides context for how this test fits into cardiovascular risk evaluation. Data not provided in the input are noted as unavailable. This summary is intended for national audiences including payers, lab billing teams, and clinicians seeking concise policy and billing context for CPT code 0541U.
Billing Code Overview
CPT code 0541U is a Proprietary Laboratory Analyses (PLA) code that applies to a single, manufacturer- or lab-specific test. Report 0541U only for the HDL Reverse Cholesterol Transport Panel with pCAD Score performed by Quest Diagnostics®. The test evaluates cardiovascular disease risk by measuring cholesterol efflux capacity — how effectively high–density lipoprotein (HDL) removes cholesterol from cells — and reports a prediction score for coronary artery disease (pCAD).
Service type: Laboratory test (PLA)
Typical site of service: Clinical laboratory / reference laboratory
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 56-year-old patient with intermediate cardiovascular risk on traditional lipid panel and clinical risk scoring presents for further risk stratification. The clinician orders the 0541U HDL Reverse Cholesterol Transport Panel with pCAD Score from Quest Diagnostics® to assess HDL cholesterol efflux capacity and derived pCAD prediction. Blood is collected in an ambulatory outpatient laboratory or hospital outpatient draw station; specimen is sent to the vendor laboratory for LC–MS/MS protein quantification and pCAD algorithm reporting. Results return as a numeric pCAD score with interpretation used by the ordering provider to refine coronary artery disease risk assessment and guide shared decision-making on preventive therapies and surveillance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When additional work or documentation demonstrates substantially greater effort or complexity beyond the typical assay interpretation or reporting burden for 0541U. |
52 |