Summary & Overview
CPT 31578: Flexible Laryngoscopy with Non-Laser Lesion Removal
CPT code 31578 covers flexible laryngoscopy with visualization of the larynx and non-laser excision of lesions. This procedure is commonly used to diagnose and remove benign and selected malignant lesions of the vocal folds and adjacent laryngeal structures when endoscopic access with a flexible scope is appropriate. Nationally, the code matters for perioperative planning, site-of-service determination, and coverage policies where outpatient endoscopic procedures are reviewed for medical necessity and appropriate setting.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, comparisons of common payer coverage approaches, and practical benchmarks relevant to coding and billing for outpatient endoscopic laryngeal procedures. The publication also outlines typical sites of service and the service type to help clinical and billing teams align documentation with payer expectations.
The report does not provide clinical recommendations. It summarizes the code definition, the procedural setting, and the payer landscape so revenue cycle and clinical staff can reference the code's clinical intent, expected service environment, and payer coverage scope for national audiences.
Billing Code Overview
CPT code 31578 describes the use of a flexible laryngoscope to visualize the larynx (voice box) and the non-laser removal of lesions identified during that examination. The procedure combines diagnostic endoscopy of the laryngeal structures with therapeutic tissue removal performed using non-laser techniques.
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Service type: Flexible laryngoscopy with non-laser lesion removal (diagnostic endoscopy combined with non-laser therapeutic excision)
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Typical site of service: Ambulatory surgical center or hospital outpatient department; may also be performed in office settings equipped for flexible laryngoscopy and minor operative procedures.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45-year-old adult presenting with hoarseness, throat discomfort, or a visible lesion on laryngoscopy. Initial evaluation in an otolaryngology clinic includes history, flexible transnasal or transoral laryngoscopy, and office-based visualization of the larynx. When a discrete benign-appearing lesion (for example, vocal fold polyp, cyst, papilloma, or mucosal hyperplasia) is identified and amenable to in-office management, the provider performs a flexible laryngoscopic evaluation with direct removal of the lesion using non-laser instruments (forceps, microinstruments, or suction) under topical anesthesia. The workflow includes pre-procedure consent, topical anesthesia and vasoconstriction, flexible laryngoscope insertion, lesion inspection and documentation, lesion removal via appropriate microinstruments through the scope or via coordinated microinstrument approach, hemostasis, and post-procedure voice rest and follow-up instructions. Typical sites of service are the otolaryngology ambulatory clinic or a physician office equipped for minor endoscopic procedures. Typical patient scenario: adult with progressive hoarseness and a unilateral vocal fold lesion seen on flexible laryngoscopy; office-based flexible laryngoscopy with non-laser excision performed under topical anesthesia with local vasoconstrictor and topical anesthetic agents; short observation and discharge with voice therapy referral as indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default — no modifier |