Code: 31575
Description: Laryngoscopy, flexible; diagnostic
Context: This code is used when a provider performs a flexible laryngoscopy to visually examine the larynx, vocal cords, and nearby structures for diagnostic purposes.

Guidelines for Proper Use

• Diagnostic purpose only: Use CPT 31575 when the procedure is performed solely for visualization and diagnosis, not for surgical or therapeutic intervention.
• Flexible scope: Applies specifically to flexible fiberoptic laryngoscopy, not rigid or indirect mirror examinations.
• Performed in office or outpatient: Commonly done under topical anesthesia in office or clinic settings.
• Indications: Appropriate for evaluation of hoarseness, throat pain, vocal cord paralysis, laryngeal lesions, chronic cough, or airway obstruction.
• Not bundled with surgical codes: If a surgical laryngoscopy or another procedure is performed, the diagnostic code should not be billed separately unless documentation supports distinct services.

Common Misuses of 31575

• Using for rigid laryngoscopy: This code does not apply to rigid scope procedures.
• Reporting during surgery: Do not report separately if done as part of a surgical laryngeal procedure.
• Insufficient documentation: Failing to describe structures visualized or findings can lead to denial.
• Incorrect for therapeutic use: Use alternative codes for procedures involving biopsy or lesion removal.

Notes / Documentation Tips

• Include indications and findings: Document the reason for the procedure and what was visualized (e.g., cords, epiglottis, arytenoids).
• Specify instrument type: Clarify that a flexible laryngoscope was used.
• Detail abnormalities: Include findings like lesions, nodules, edema, or erythema.
• Patient tolerance: Note anesthesia type and patient response if applicable.
• Medical necessity: Ensure documentation supports the need for visualization due to symptoms or exam limitations.