Summary & Overview
CPT 81401: Molecular Pathology Procedure, Level 2
CPT code 81401 is a key billing code for Level 2 molecular pathology procedures, encompassing tests that analyze multiple genetic variants or detect dynamic mutation disorders. These laboratory services are essential for genetic screening, cancer diagnostics, and guiding personalized treatment strategies. Nationally, the code is recognized by major commercial payers including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare, reflecting its widespread clinical and reimbursement relevance.
This publication provides a comprehensive overview of CPT 81401, detailing its clinical applications, typical laboratory settings, and payer coverage. Readers will gain insights into current policy updates, reimbursement benchmarks, and the evolving role of molecular pathology in precision medicine. The analysis also highlights common billing modifiers and associated taxonomies, offering clarity on coding practices and laboratory classifications. Additionally, relevant ICD-10 diagnoses and related CPT codes are discussed to contextualize the code within broader genetic testing and oncology workflows.
Healthcare professionals, laboratory administrators, and policy analysts will find actionable information on payer coverage, coding nuances, and clinical context for CPT 81401. The summary equips stakeholders with the knowledge needed to navigate the complexities of molecular pathology billing and policy trends.
CPT Code Overview
CPT 81401 represents a Level 2 molecular pathology procedure. This code is used for laboratory tests that analyze 2-10 single nucleotide polymorphisms (SNPs), one methylated variant, or one somatic variant, typically using nonsequencing target variant analysis. It also covers detection of dynamic mutation disorders or triplet repeat expansions. The service type is Molecular Pathology / Laboratory, and the typical site of service is an Independent Laboratory (POS 81). These procedures play a critical role in genetic testing, cancer diagnostics, and personalized medicine.
Clinical & Coding Specifications
Clinical Context
A patient is referred to an independent laboratory for molecular pathology testing to evaluate for specific genetic variants associated with cancer or hereditary disease. The laboratory receives a specimen (such as blood or tissue) and performs a Level 2 molecular pathology procedure, which may involve analyzing 2-10 single nucleotide polymorphisms (SNPs), detecting a single methylated variant, or identifying a somatic variant using nonsequencing target variant analysis. This testing is often ordered for patients with a personal or family history of cancer, uncertain neoplasm behavior, or for screening genetic and chromosomal anomalies. The workflow includes specimen collection, laboratory analysis, and reporting of results to the ordering provider for clinical decision-making.
Coding Specifications
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Modifiers:
GX: Used when a notice of liability has been issued to the patient, voluntarily under payer policy. This modifier is typically applied when the laboratory believes the service may not be covered by the payor (such as Medicare) and has informed the patient.GY: Used when the item or service is statutorily excluded from coverage, does not meet the definition of any Medicare benefit, or is not a contract benefit for non-Medicare insurers.
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Provider Taxonomies:
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