CPT 31570 Laryngoscopy Vocal Cord Injection Reimbursement

CPT code 31570 represents direct laryngoscopy with injection of a therapeutic agent into one or more vocal cords. The code captures a combined diagnostic and therapeutic procedure used to evaluate laryngeal anatomy and deliver treatments such as corticosteroids, botulinum toxin, or other agents to address vocal cord lesions, paralysis-related issues, or spasmodic dysphonia. Nationally, this code is important because it informs coverage, site-of-service decisions, and resource allocation for airway and voice-related specialty care.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. The publication summarizes common billing practices, typical sites of service, and payment considerations across major commercial and federal payers.

Readers will learn the clinical context for use of CPT code 31570, expected settings where the service is delivered, and the types of clinical scenarios that prompt vocal cord injection. The report provides benchmarking information on utilization and reimbursement patterns, highlights payer policy variations relevant to coverage and prior authorization, and outlines operational implications for providers billing this code. Data not available in the input are noted where applicable.

Billing Code Overview

CPT code 31570 describes a diagnostic and therapeutic procedure in which the provider uses a laryngoscope to directly visualize the larynx (voice box) and then injects a therapeutic agent into one or more vocal cords. This combines direct laryngoscopy for assessment with an injection procedure targeting vocal cord pathology.

Service type: Direct laryngoscopy with vocal cord injection (diagnostic visualization plus therapeutic injection)
Typical site of service: Ambulatory surgical center or hospital outpatient setting; may also be performed in an office procedure room when appropriate equipment and expertise are available.

Clinical Context

A typical patient is an adult presenting to an otolaryngology clinic with unilateral vocal cord paresis causing persistent hoarseness and glottic insufficiency. The patient has undergone laryngeal visualization with flexible laryngoscopy in clinic and is scheduled for direct laryngoscopy in the operating room under monitored anesthesia care or general anesthesia. The provider performs direct visualization of the larynx using a laryngoscope and injects a therapeutic agent, such as a collagen, hyaluronic acid, or fat-based filler, into one or both vocal folds to medialize the cord and improve phonation. The workflow includes preoperative evaluation and consent, intraoperative direct laryngoscopy with visualization and precise injection into the vocalis muscle or superficial lamina propria, postoperative voice assessment in recovery, and follow-up voice therapy referral as indicated. Typical site of service is an ambulatory surgical center or hospital operating room. Service type is a surgical laryngoscopy with injection for therapeutic vocal fold medialization documented by 31570.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work or time is substantially greater than typical for `31570` due to complexity.

Taxonomy Code	Specialty	Notes
`207G00000X`	Otolaryngology (ENT)	Most common specialty performing `31570` for vocal fold medialization.
`2080P0207X`	Plastic and Reconstructive Surgery	Performs laryngeal framework or augmentation procedures when involved.
`207L00000X`	Laryngology (subspecialty of ENT)	Focused laryngeal specialists frequently perform injection laryngoplasty.
`207VP0000X`	Speech-Language Pathologist	Provides pre/postoperative voice therapy; does not bill `31570` but is part of care team.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`J38.01`	Paralysis of vocal cords and larynx, unilateral	Vocal cord paralysis causing glottic insufficiency treated with medialization injection `31570`.
`J38.02`	Paralysis of vocal cords and larynx, bilateral	Bilateral paresis may require staged or bilateral injections; influences surgical planning.
`J38.1`	Paral cord dysfunction	Voice weakness or breathy dysphonia addressed by injection to improve glottic closure.
`R49.0`	Dysphonia	Symptom code used when hoarseness is primary complaint leading to diagnostic laryngoscopy and possible injection.
`J37.8`	Other chronic laryngitis	Chronic inflammatory conditions with glottic insufficiency where injection augmentation may be therapeutic.
`D14.1`	Benign neoplasm of larynx	Benign lesions may cause glottic insufficiency; injections can be adjunctive for voice improvement.
`J38.6`	Vocal fold atrophy	Age-related or neurogenic atrophy managed with injection augmentation to restore bulk and improve voice.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`31575`	Laryngoscopy, direct, with removal of foreign body, lesion, or tissue	Used when biopsy or excision of a laryngeal lesion is performed in the same session prior to or instead of injection.
`31579`	Laryngoscopy, direct, with excision or ablation of lesion(s); single or multiple	Performed when ablation/excision of lesions is required in addition to or instead of injection therapy.
`31505`	Laryngoscopy with biopsy	Used if biopsy of a suspicious vocal fold lesion is obtained during laryngoscopy before injection.
`31582`	Laryngoscopy, direct, with tracheoscopy (separate procedure)	Used when extended airway evaluation including trachea is performed in the same operative setting.
`92507`	Treatment of speech, language, voice, communication, and/or auditory processing disorder; individual	Often provided postoperatively by speech-language pathology to rehabilitate voice after `31570`.

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Summary & Overview

CPT 31570: Direct Laryngoscopy with Vocal Cord Injection