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Official Description

Infectious agent antigen detection by immunofluorescent technique; Legionella micdadei

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 87277 refers to the detection of infectious agent antigens using an immunofluorescent technique specifically for the bacterium Legionella micdadei. This procedure involves the collection of a tissue sample from the patient, which is then treated with a fluoroscopic dye. The purpose of adding this dye is to enhance the visibility of the sample when examined under a fluorescent microscope. The fluorescent microscope allows healthcare professionals to identify the presence of Legionella micdadei, a pathogen responsible for causing Legionnaires' disease, a severe form of pneumonia. This method is crucial for diagnosing infections caused by this bacterium, enabling timely and appropriate treatment for affected individuals.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 87277 is indicated for the detection of the bacterium Legionella micdadei in patients who may be exhibiting symptoms of Legionnaires' disease or other related respiratory infections. The following conditions may warrant the use of this diagnostic test:

  • Suspected Legionnaires' Disease Patients presenting with pneumonia-like symptoms, particularly those with a history of exposure to potential sources of Legionella.
  • Immunocompromised Patients Individuals with weakened immune systems who are at higher risk for severe infections and may require specific identification of pathogens.
  • Outbreak Investigations Situations where there is a suspected outbreak of Legionnaires' disease, necessitating rapid identification of the causative agent.

2. Procedure

The procedure for CPT® Code 87277 involves several critical steps to ensure accurate detection of Legionella micdadei. The following procedural steps are outlined:

  • Step 1: Sample Collection A tissue sample is collected from the patient, typically from the respiratory tract or lung tissue, depending on the clinical scenario. This sample is crucial for the subsequent analysis and must be handled with care to avoid contamination.
  • Step 2: Application of Fluoroscopic Dye Once the tissue sample is obtained, a fluoroscopic dye is added to the sample. This dye is specifically designed to bind to the antigens present in the Legionella micdadei bacteria, enhancing their visibility under a fluorescent microscope.
  • Step 3: Microscopic Examination The treated sample is then examined under a fluorescent microscope. The healthcare professional looks for the presence of the fluorescently labeled antigens, which indicates the presence of Legionella micdadei. This step is critical for confirming the diagnosis of infection.

3. Post-Procedure

After the completion of the procedure associated with CPT® Code 87277, the healthcare provider will typically review the findings from the microscopic examination. If Legionella micdadei is detected, appropriate treatment options will be discussed with the patient, which may include antibiotics or other supportive care measures. Additionally, the provider may monitor the patient for any potential complications arising from the infection. It is essential for the healthcare team to communicate the results of the test to the patient and to consider any necessary follow-up actions based on the findings.

Short Descr LEGIONELLA MICDADEI AG IF
Medium Descr IAADI LEGIONELLA MICDADEI
Long Descr Infectious agent antigen detection by immunofluorescent technique; Legionella micdadei
Status Code Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Conditionally packaged laboratory tests
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T1H - Lab tests - other (non-Medicare fee schedule)
MUE Not applicable/unspecified.
CCS Clinical Classification 206 - Microscopic examination (bacterial smear, culture, toxicology)
Date
Action
Notes
2017-12-31 Deleted Code deleted.
2011-01-01 Changed Short description changed.
2001-01-01 Added First appearance in code book in 2001.
Code
Description
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