Summary & Overview
CPT 87631: Multiplex Respiratory Pathogen Nucleic Acid Test (3–5 targets)
CPT code 87631 represents a multiplex nucleic acid-based laboratory test that detects three to five respiratory pathogens or subtypes, using amplified probe techniques with multiplex reverse transcription when applicable. This category of molecular diagnostic testing is clinically important for identifying viral causes of acute respiratory infections, guiding infection control measures, appropriate antiviral use, and cohorting decisions in healthcare settings. Nationally, such tests support surveillance and clinical decision-making across outpatient clinics, emergency departments, and hospital laboratories.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for multiplex respiratory panels, common billing and coding considerations specific to CPT code 87631, and payer coverage patterns where available. The publication summarizes typical sites of service and service classification, highlights common modifiers associated with laboratory services (listed separately), and outlines benchmarking topics and policy developments that affect reimbursement and utilization of respiratory pathogen panels.
This resource is intended to inform billing staff, laboratory managers, and health policy stakeholders about the scope and clinical role of CPT code 87631, plus the payer landscape and areas where policy changes may influence adoption and payment practices. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 87631 describes a laboratory molecular diagnostic test that detects three to five respiratory pathogens or subtypes using nucleic acid detection methods. The procedure includes multiplex amplified probe techniques and may incorporate multiplex reverse transcription when RNA viruses are targeted. Pathogens commonly assessed include adenovirus, influenza virus, coronavirus, metapneumovirus, parainfluenza virus, respiratory syncytial virus, and rhinovirus.
Service type: Laboratory molecular diagnostic service, multiplex respiratory pathogen panel
Typical site of service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A 48-year-old adult presents to an urgent care clinic in late fall with acute onset cough, fever, nasal congestion, and shortness of breath for 48 hours. The clinician performs a focused respiratory exam and orders a multiplex respiratory viral panel to identify common viral pathogens. A nasopharyngeal swab specimen is collected on site and sent to the facility laboratory. The laboratory technologist performs nucleic acid detection using a multiplex amplified probe technique with reverse transcription when indicated to detect three to five respiratory viruses or subtypes (for example, influenza A/B, respiratory syncytial virus, rhinovirus/enterovirus, adenovirus, and seasonal coronavirus). The result returns to the ordering clinician within the same day or next day, informing infection control decisions, antiviral therapy considerations, and cohorting of patients in the facility. Typical sites of service include hospital laboratories, independent clinical laboratories, urgent care clinics with on-site lab capabilities, and reference laboratories that receive specimens from outpatient settings.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the physician or pathologist professional interpretation portion, if applicable alongside a technical-only claim. |
TC |