CPT 87487: Chlamydia pneumoniae Nucleic Acid Probe Quantification

CPT code 87487 represents a molecular diagnostic laboratory test that quantifies infection with Chlamydia pneumoniae using a nucleic acid probe technique. This code matters nationally because Chlamydia pneumoniae is a common respiratory pathogen with variable clinical severity across age groups; accurate laboratory quantification supports diagnosis, epidemiologic surveillance, and appropriate clinical management pathways.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines how payers typically classify and reimburse molecular infectious disease testing, and highlights considerations relevant to lab services billing, documentation, and site-of-service impacts.

Readers will learn the clinical context for use of CPT code 87487, the typical settings where the test is performed (clinical and hospital laboratories), and the service type (molecular diagnostic assay for infectious disease). The piece provides benchmarks and policy context relevant to laboratory molecular testing reimbursement and coding practice, summarizes common modifier usage where applicable, and identifies areas where payers commonly require documentation or prior authorization. Data not available in the input is noted where applicable.

Billing Code Overview

CPT code 87487 describes a laboratory test that quantifies infection with Chlamydia pneumoniae using a nucleic acid probe technique. The procedure targets detection and measurement of the pathogen known as TWAR (Taiwan Acute Respiratory agent), which commonly causes mild respiratory illness in children and more severe respiratory disease in adults.

Service type: Infectious disease laboratory testing, molecular diagnostic assay

Typical site of service: Clinical laboratory or hospital laboratory; specimen collected in outpatient clinics or inpatient settings as clinically indicated.

Clinical Context

A typical patient is an adult presenting to an outpatient clinic or emergency department with symptoms of lower respiratory tract infection such as persistent cough, wheeze, shortness of breath, fever, or atypical pneumonia not improving with initial empiric therapy. The clinician obtains a nasopharyngeal swab, throat swab, or lower respiratory specimen and sends it to the clinical laboratory for nucleic acid probe testing to quantify infection with Chlamydia pneumoniae using CPT 87487. The laboratory analyst performs the nucleic acid probe technique and reports a quantitative result to the ordering clinician. Results inform antimicrobial selection (for example, macrolides or tetracyclines) and public health reporting when indicated. Typical sites of service include outpatient clinics, urgent care centers, hospital outpatient laboratories, and inpatient hospital laboratories. The workflow includes specimen collection, labeling and transport to the lab, accessioning, nucleic acid probe testing, result verification by a technologist or pathologist, and electronic result reporting to the ordering provider.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the professional (interpretation) component of the test if the laboratory separates technical and professional components.

Taxonomy Code	Specialty	Notes
207Q00000X	Infectious Disease	Infectious disease physicians commonly interpret complex respiratory pathogen testing and guide therapy.
207K00000X	Allergy & Immunology	Specialists managing chronic respiratory infections and atypical presentations may order targeted testing.
1223G0001X	Clinical Laboratory	Clinical laboratory directors and pathologists oversee molecular diagnostic testing and result validation.
363LP0800X	Pulmonary Disease	Pulmonologists frequently evaluate suspected atypical pneumonias and order `CPT 87487`.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`J18.9`	Pneumonia, unspecified organism	Used when a patient has pneumonia and testing for atypical organisms like `Chlamydia pneumoniae` is performed to identify the etiology.
`J22`	Unspecified acute lower respiratory infection	Applied for acute lower respiratory infections where specific pathogen testing is done to establish cause.
`J20.9`	Acute bronchitis, unspecified	Relevant when testing for atypical bacterial causes in prolonged or severe bronchitis presentations.
`R05`	Cough	Symptom code used when cough prompts respiratory pathogen testing including `CPT 87487`.
`J00`	Acute nasopharyngitis (common cold)	May be used in evaluations where atypical pathogens are considered in prolonged or complicated upper respiratory infections.
`J12.9`	Viral pneumonia, unspecified	Included when clinicians distinguish viral from atypical bacterial pneumonia through targeted testing.
`A49.2`	Unspecified bacterial infection of the respiratory tract	Used when a bacterial respiratory infection is suspected but the specific pathogen is not yet identified.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`87476`	Infectious agent detection by nucleic acid (DNA or RNA); Chlamydia trachomatis, amplified probe technique, direct probe	Often ordered concurrently when clinicians evaluate for multiple Chlamydia species or genital sources depending on clinical presentation.
`87591`	Infectious agent detection by nucleic acid (DNA or RNA); Bordetella pertussis, amplified probe technique	May be ordered in the differential diagnosis of atypical respiratory infections presenting with prolonged cough.
`87502`	Infectious agent detection by nucleic acid (DNA or RNA); Mycoplasma pneumoniae, amplified probe technique	Commonly performed alongside `CPT 87487` when evaluating atypical community-acquired pneumonia to identify alternative atypical pathogens.
`87070`	Culture, bacterial, any other source except urine, aerobic, with isolation and presumptive identification of isolates	May be ordered if a clinician also suspects bacterial coinfection and wants culture-based identification and susceptibility testing.
`87487`	Infectious agent detection by nucleic acid (DNA or RNA); Chlamydia pneumoniae, amplified probe technique, quantitative	The index test used to quantify `Chlamydia pneumoniae` nucleic acid in respiratory specimens; informs diagnosis and antimicrobial decisions.

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Summary & Overview