Summary & Overview
CPT 31535: Direct Laryngoscopy with Biopsy of Larynx
CPT code 31535 represents direct laryngoscopy with biopsy of the larynx, a diagnostic surgical procedure used to visualize the voice box and obtain tissue samples for pathology. This code matters nationally because it captures care for patients with suspected laryngeal lesions, voice disorders, or head and neck malignancy, and it informs utilization, quality measurement, and payment for otolaryngology surgical services. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and billing overview, typical sites of service and service line context, common modifiers associated with operative and diagnostic procedures, and payer-specific coverage considerations where available. The write-up also summarizes benchmarks and trends relevant to utilization and coding practice, and highlights areas where policy updates or documentation practices can affect claims processing. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 31535 describes a direct laryngoscopy with biopsy: the provider uses a laryngoscope to visualize the larynx (voice box) and surgically removes a tissue sample for pathological study. This procedure is a diagnostic surgical biopsy of the laryngeal mucosa.
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Service type: Diagnostic surgical procedure (laryngoscopy with biopsy)
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Typical site of service: Operative suite, ambulatory surgery center, or hospital outpatient setting
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient presents to the otolaryngology clinic with progressive hoarseness and intermittent throat discomfort for six weeks. Flexible laryngoscopy in clinic identifies a suspicious lesion on the vocal fold. The patient is scheduled for direct laryngoscopy with biopsy under general anesthesia to obtain tissue for histopathologic evaluation and rule out dysplasia or malignancy. Pre-procedure workflow includes informed consent, review of anticoagulation status, preoperative anesthesia assessment, and scheduling in an ambulatory surgery center or hospital operating room depending on comorbidities. Intraoperative steps include induction of general anesthesia, direct laryngoscopy with a laryngoscope for exposure, microscopic visualization of the larynx, biopsy sampling of the lesion, hemostasis, and specimen submission to pathology. Post-procedure workflow includes recovery in PACU, discharge instructions for voice rest and wound care, pathology result review, and planning of definitive management based on histology (surveillance, further excision, radiation, or oncologic referral).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the day of a procedure | Use when an unrelated or separately identifiable E/M is performed the same day as the laryngoscopy and biopsy. |