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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.

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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.

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CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score

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Get alerted when payer policies referencing 0541U are released or updated.

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Billing Code Overview

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`	Reduced services	When the laboratory performs an abbreviated version of the test or reports partial panel results due to specimen insufficiency or other limitations.
`53`	Discontinued procedure	When specimen collection or processing is attempted but the test is aborted and cannot be completed for reasons outside the provider's control.
`59`	Distinct procedural service	When `0541U` is billed on the same date as another laboratory test and documentation supports that this panel is independent and separate from other testing.
`90`	Reference (outside) laboratory	When `0541U` is sent to Quest Diagnostics® as an outside laboratory and billing needs to reflect reference lab processing.
`91`	Repeat clinical diagnostic laboratory test	When the identical `0541U` panel is repeated on the same patient within a medically necessary timeframe and documentation supports repeat testing.
`96`	Habilitative services (if applicable)	Rarely applicable; use only if payer requires for diagnostic program coding in specific benefit contexts.
`TC`	Technical component	When reporting the technical component separately from the professional interpretation if split billing is permitted by payer policy.
`26`	Professional component	When reporting only the professional interpretation component separate from the technical component of `0541U` if applicable.
`XE`	Separate encounter (Modifier XE)	When the service is distinct by encounter on the same day (use only where allowed by payer policy) to indicate a separate clinical encounter.

Taxonomy Code	Specialty	Notes
2084P0800X	Clinical Laboratory	Clinical pathologists and laboratory directors overseeing specialized assays.
207RP1001X	Cardiology	Cardiologists ordering advanced cardiovascular risk stratification tests.
207Q00000X	Preventive Medicine	Preventive medicine specialists using biomarker-based risk prediction.
363LP0200X	Phlebotomy	Phlebotomists and outpatient drawing services performing specimen collection.
207K00000X	Internal Medicine	Primary care internists managing chronic cardiovascular risk who order the test.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E78.5`	Hyperlipidemia, unspecified	Common indication for advanced lipid and HDL functional testing when standard lipid abnormalities are present.
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Used when assessing residual coronary disease risk or progression via HDL function testing.
`Z13.6`	Encounter for screening for cardiovascular disorders	Applicable when `0541U` is used for enhanced screening in patients with risk factors.
`E78.0`	Pure hypercholesterolemia	Relevant for assessing HDL efflux function in patients with elevated LDL cholesterol.
`I10`	Essential (primary) hypertension	Hypertension is a common comorbidity prompting comprehensive cardiovascular risk evaluation including `0541U`.
`E11.9`	Type 2 diabetes mellitus without complications	Diabetes increases cardiovascular risk and is an indication for advanced risk stratification tests like `0541U`.
`Z12.1`	Encounter for screening for malignant neoplasm of skin (not directly related)	Data not applicable — Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`80061`	Lipid panel (total cholesterol, HDL cholesterol, LDL cholesterol, triglycerides)	Common baseline test performed before or alongside `0541U` for standard lipid profiling and clinical correlation with HDL function results.
`83695`	Apolipoprotein B, direct measurement	Performed in some cardiovascular risk assessments to complement HDL functional data from `0541U`.
`84478`	Troponin I or T, quantitative	Used in acute coronary syndrome evaluation; may be ordered concurrently in symptomatic patients undergoing risk assessment.
`93000`	Electrocardiogram, routine ECG with interpretation and report	Noninvasive cardiac testing often used in broader cardiovascular evaluation that may accompany ordering of `0541U`.
`93880`	Duplex scan of extracranial arteries; limited or follow-up study	Imaging studies for vascular assessment that can be part of an extended workup when `0541U` suggests elevated pCAD risk.

CPT 0001U: PreciseType HEA Multiplex Erythrocyte Antigen Assay

CPT-0002U-POLYPDX-URINE-METABOLOMIC-ASSAY-ADENOMATOUS-POLYP-RISK

CPT 0002U: Urine Metabolomic Polyp Risk Assay (PolypDX™)

CPT-0003U-OVAR-A-NEXT-GENERATION-OVARIAN-CANCER-RISK-ASSAY

CPT 0003U: Overa™ (OVA1 Next Generation) Ovarian Cancer Risk Assay

CPT-0005U-PROSTATE-EXOSOMEDX-INTELLISCORE-GENE-EXPRESSION-URINE-TEST

CPT 0005U: ExosomeDx Prostate (IntelliScore) Urine Gene Expression Risk Test

CPT-0007U-TOXPROTECT-URINE-DRUG-SCREEN-WITH-DNA-AUTHENTICATION

CPT 0007U: ToxProtect Urine Drug Screen with DNA Authentication

CPT-0008U-H-PYLORI-ANTIBIOTIC-RESISTANCE-SEQUENCING-PANEL

CPT 0008U: H. pylori Antibiotic Resistance Panel, Gene Sequence Analysis

CPT-0009U-DEPARRAY-HER2-FISH-TUMOR-CELL-ISOLATION

CPT 0009U: DEPArray HER2 Tumor‑Cell Isolation with FISH Analysis

CPT-0010U-BACTERIAL-TYPING-WHOLE-GENOME-SEQUENCING-MAYO-CLINIC

CPT 0010U: Bacterial Typing by Whole Genome Sequencing, Mayo Clinic

CPT-0011U-CORDANT-CORE-ALGORITHMIC-ORAL-FLUID-DRUG-TEST

CPT 0011U: Cordant CORE™ Oral Fluid Drug Test with Algorithmic Steady‑State Comparison

CPT-0016U-BCR-ABL1-MAJOR-MINOR-FUSION-TRANSCRIPT-TESTING

CPT 0016U: BCR–ABL1 Major and Minor Breakpoint Fusion Transcript Testing

Showing 1–10 of 536

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

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`	Reduced services	When the laboratory performs an abbreviated version of the test or reports partial panel results due to specimen insufficiency or other limitations.
`53`	Discontinued procedure	When specimen collection or processing is attempted but the test is aborted and cannot be completed for reasons outside the provider's control.
`59`	Distinct procedural service	When `0541U` is billed on the same date as another laboratory test and documentation supports that this panel is independent and separate from other testing.
`90`	Reference (outside) laboratory	When `0541U` is sent to Quest Diagnostics® as an outside laboratory and billing needs to reflect reference lab processing.
`91`	Repeat clinical diagnostic laboratory test	When the identical `0541U` panel is repeated on the same patient within a medically necessary timeframe and documentation supports repeat testing.
`96`	Habilitative services (if applicable)	Rarely applicable; use only if payer requires for diagnostic program coding in specific benefit contexts.
`TC`	Technical component	When reporting the technical component separately from the professional interpretation if split billing is permitted by payer policy.
`26`	Professional component	When reporting only the professional interpretation component separate from the technical component of `0541U` if applicable.
`XE`	Separate encounter (Modifier XE)	When the service is distinct by encounter on the same day (use only where allowed by payer policy) to indicate a separate clinical encounter.

Taxonomy Code	Specialty	Notes
2084P0800X	Clinical Laboratory	Clinical pathologists and laboratory directors overseeing specialized assays.
207RP1001X	Cardiology	Cardiologists ordering advanced cardiovascular risk stratification tests.
207Q00000X	Preventive Medicine	Preventive medicine specialists using biomarker-based risk prediction.
363LP0200X	Phlebotomy	Phlebotomists and outpatient drawing services performing specimen collection.
207K00000X	Internal Medicine	Primary care internists managing chronic cardiovascular risk who order the test.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E78.5`	Hyperlipidemia, unspecified	Common indication for advanced lipid and HDL functional testing when standard lipid abnormalities are present.
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Used when assessing residual coronary disease risk or progression via HDL function testing.
`Z13.6`	Encounter for screening for cardiovascular disorders	Applicable when `0541U` is used for enhanced screening in patients with risk factors.
`E78.0`	Pure hypercholesterolemia	Relevant for assessing HDL efflux function in patients with elevated LDL cholesterol.
`I10`	Essential (primary) hypertension	Hypertension is a common comorbidity prompting comprehensive cardiovascular risk evaluation including `0541U`.
`E11.9`	Type 2 diabetes mellitus without complications	Diabetes increases cardiovascular risk and is an indication for advanced risk stratification tests like `0541U`.
`Z12.1`	Encounter for screening for malignant neoplasm of skin (not directly related)	Data not applicable — Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`80061`	Lipid panel (total cholesterol, HDL cholesterol, LDL cholesterol, triglycerides)	Common baseline test performed before or alongside `0541U` for standard lipid profiling and clinical correlation with HDL function results.
`83695`	Apolipoprotein B, direct measurement	Performed in some cardiovascular risk assessments to complement HDL functional data from `0541U`.
`84478`	Troponin I or T, quantitative	Used in acute coronary syndrome evaluation; may be ordered concurrently in symptomatic patients undergoing risk assessment.
`93000`	Electrocardiogram, routine ECG with interpretation and report	Noninvasive cardiac testing often used in broader cardiovascular evaluation that may accompany ordering of `0541U`.
`93880`	Duplex scan of extracranial arteries; limited or follow-up study	Imaging studies for vascular assessment that can be part of an extended workup when `0541U` suggests elevated pCAD risk.

CPT 0001U: PreciseType HEA Multiplex Erythrocyte Antigen Assay

CPT-0002U-POLYPDX-URINE-METABOLOMIC-ASSAY-ADENOMATOUS-POLYP-RISK

CPT 0002U: Urine Metabolomic Polyp Risk Assay (PolypDX™)

CPT-0003U-OVAR-A-NEXT-GENERATION-OVARIAN-CANCER-RISK-ASSAY

CPT 0003U: Overa™ (OVA1 Next Generation) Ovarian Cancer Risk Assay

CPT-0005U-PROSTATE-EXOSOMEDX-INTELLISCORE-GENE-EXPRESSION-URINE-TEST

CPT 0005U: ExosomeDx Prostate (IntelliScore) Urine Gene Expression Risk Test

CPT-0007U-TOXPROTECT-URINE-DRUG-SCREEN-WITH-DNA-AUTHENTICATION

CPT 0007U: ToxProtect Urine Drug Screen with DNA Authentication

CPT-0008U-H-PYLORI-ANTIBIOTIC-RESISTANCE-SEQUENCING-PANEL

CPT 0008U: H. pylori Antibiotic Resistance Panel, Gene Sequence Analysis

CPT-0009U-DEPARRAY-HER2-FISH-TUMOR-CELL-ISOLATION

CPT 0009U: DEPArray HER2 Tumor‑Cell Isolation with FISH Analysis

CPT-0010U-BACTERIAL-TYPING-WHOLE-GENOME-SEQUENCING-MAYO-CLINIC

CPT 0010U: Bacterial Typing by Whole Genome Sequencing, Mayo Clinic

CPT-0011U-CORDANT-CORE-ALGORITHMIC-ORAL-FLUID-DRUG-TEST

CPT 0011U: Cordant CORE™ Oral Fluid Drug Test with Algorithmic Steady‑State Comparison

CPT-0016U-BCR-ABL1-MAJOR-MINOR-FUSION-TRANSCRIPT-TESTING

CPT 0016U: BCR–ABL1 Major and Minor Breakpoint Fusion Transcript Testing

Showing 1–10 of 536

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score

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Billing Code Overview

OpenPayer

CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score

Sign up for cpt 0541U policy alerts

Billing Code Overview

CPT 0541U: HDL Reverse Cholesterol Transport Panel with pCAD Score

Sign up for cpt 0541U policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT code 0541U represent and which laboratory performs this test?

Where is the 0541U test performed and how are specimens handled?

Which billing modifiers are applicable to 0541U and when might they be used?

What other tests are commonly ordered with 0541U?

Which payers are noted for covering 0541U and are coverage details provided?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT code 0541U represent and which laboratory performs this test?

Where is the 0541U test performed and how are specimens handled?

Which billing modifiers are applicable to 0541U and when might they be used?

What other tests are commonly ordered with 0541U?

Which payers are noted for covering 0541U and are coverage details provided?

References