Summary & Overview
CPT 42821: Tonsillectomy and Adenoidectomy, Age 12 or Older
CPT code 42821 denotes a combined tonsillectomy and adenoidectomy performed on patients aged 12 years or older. This common otolaryngology surgical code is used nationally for documenting and billing removal of both tonsils and adenoids in adolescent and adult patients. The code matters because it captures a frequently performed ENT operation with implications for surgical utilization, facility resource planning, and payer coverage policies.
Key payers covered in this publication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for when combined tonsillectomy and adenoidectomy is performed, typical sites of service such as hospital operating rooms and ambulatory surgery centers, and common billing considerations tied to this procedure. The report outlines benchmarks and comparative metrics where available, summarizes relevant policy and coverage updates affecting prior authorization and payment, and highlights coding notes important for accurate claim submission.
This executive summary is aimed at payers, provider billing teams, and health policy analysts seeking a concise national perspective on utilization and billing practice for CPT code 42821 and the operational and policy factors that influence claims and reimbursement.
Billing Code Overview
CPT code 42821 describes the surgical removal of the tonsils and adenoids in a patient aged 12 years or older. This procedure combines a tonsillectomy and adenoidectomy and is categorized as an otolaryngology (ENT) surgical service.
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Service type: Surgical procedure (tonsillectomy with adenoidectomy)
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Typical site of service: Hospital operating room or ambulatory surgery center
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adolescent or adult age 12 years or older presenting with chronic or recurrent tonsillitis, obstructive sleep-disordered breathing due to tonsillar hypertrophy, or chronic adenotonsillar hypertrophy causing dysphagia or recurrent otitis media. The workflow begins with an office evaluation by an otolaryngologist (ENT) including history, physical exam, and review of prior medical therapy. Indications are documented, informed consent obtained, and preoperative assessment completed (anesthesia evaluation, labs as indicated). On the day of surgery the patient undergoes general anesthesia in an ambulatory surgery center or hospital operating room. The surgeon performs a bilateral tonsillectomy with adenoidectomy using an appropriate technique (cold steel, electrocautery, coblation, or harmonic scalpel) for hemostasis and removal. Postoperative recovery includes airway monitoring, analgesia, and discharge instructions; some patients may require overnight observation if comorbidities or complications are present. Billing uses 42821 for tonsillectomy with adenoidectomy in patients aged 12 or older, with appropriate diagnosis linkage and modifier usage for billing circumstances.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work or time substantially exceeds the typical for due to extensive adhesions, fibrosis, or unexpected findings. |