CPT 00520: Anesthesia for Closed Chest Intrathoracic Procedures (Bronchoscopy)
CPT code 00520 designates anesthesia services furnished for closed chest intrathoracic procedures, such as bronchoscopy, when no more specific anesthesia code applies. This code is used nationally to document and bill the anesthetic management of patients undergoing diagnostic or therapeutic airway and pleural procedures performed without open thoracotomy. Accurate use of the code supports consistent reporting of anesthesia care complexity and resource use across hospitals and ambulatory surgical centers.
Key payers considered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication summarizes how CPT code 00520 is defined, typical clinical contexts for its use, common service settings, and connections to related intrathoracic anesthesia codes.
Readers will find: a concise clinical context for when 00520 applies (closed chest intrathoracic procedures including bronchoscopy), comparisons to nearby anesthesia codes for related procedures, and the expected sites of service. This material is intended to inform coding accuracy, billing workflow alignment, and clinical documentation consistency on a national scale.
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Billing Code Overview
CPT code 00520 describes anesthesia services provided for closed chest intrathoracic procedures, including bronchoscopy for airway visualization and investigation. The code covers anesthesia care during procedures that involve access to the thoracic cavity without open thoracotomy and that are not specifically described by another anesthesia code.
Service Type: Anesthesia for closed chest intrathoracic procedures (including bronchoscopy)
Typical Site of Service: Operating room or procedural suite where intrathoracic endoscopic procedures are performed
Clinical & Coding Specifications
Clinical Context
A 48-year-old male presents to the emergency department with sudden-onset pleuritic chest pain and dyspnea. Chest radiograph and computed tomography demonstrate a right-sided spontaneous pneumothorax. The thoracic surgery team plans a bronchoscopy with closed-chest pleural drainage and possible pleural needle procedures under monitored general anesthesia to evaluate the airway and exclude endobronchial causes of air leak prior to chest tube placement or pleurodesis. The anesthesia team performs preoperative evaluation, induction, airway management, intraoperative monitoring, anesthesia maintenance, and emergence. Post-procedure recovery includes respiratory monitoring in the PACU with supplemental oxygen and chest imaging to confirm re-expansion of the lung.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
23 | Unusual anesthesia — service when anesthesia is administered but the procedure is normally not performed under general anesthesia | Use when an emergency or atypical circumstance requires general anesthesia for a procedure usually done with local or sedation. |
50 | Bilateral procedure | Use when identical closed-chest procedures are performed on both sides during the same anesthetic. |
52 | Reduced services | Use when the anesthesia service provided is substantially reduced compared with usual practice. |
53 | Discontinued procedure | Use when anesthesia is provided but the procedure was terminated for reasons unrelated to patient condition. |
62 | Two surgeons/Co-surgery | Use when two surgeons are operating concomitantly and both are required for an intrathoracic closed-chest procedure. |
78 | Unplanned return to the operating/procedure room | Use when the patient requires an immediate return for a related procedure requiring additional anesthesia services. |
AA | Anesthesia by a physician | Use to indicate anesthesia services personally performed by an anesthesiologist. |
AD | Medical supervision by a physician: more than four concurrent anesthesia procedures | Use when the anesthesiologist supervises more than four concurrent anesthesia procedures. |
QK | Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals | Use when the physician medically directs multiple concurrent anesthesia procedures meeting CMS criteria. |
QS | Monitored anesthesia care (MAC) service | Use when monitored anesthesia care is provided rather than general or regional anesthesia. |
QX | CRNA service: anesthetist with medical direction | Use to identify a CRNA providing services under the anesthesiologist's medical direction. |
QY | CRNA service: medical supervision by physician | Use when a CRNA provides services under physician supervision according to payor rules. |
QZ | CRNA service: no medical direction by physician | Use where a CRNA furnishes anesthesia without physician direction, per payer policy. |
TC | Technical component | Rare for anesthesia codes; use if billing is split and a distinct technical component applies per payer rules. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Primary specialty providing anesthesia for closed chest procedures and bronchoscopy. |
207LC0200X | Critical Care Medicine (Anesthesiology) | Applies when critically ill patients with tension pneumothorax require anesthesia in ICU or emergency settings. |
207LP2900X | Pain Medicine (Anesthesiology) | May apply when regional anesthetic techniques or postoperative pain management are provided by anesthesiologists. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
J93.9 | Pneumothorax, unspecified | General code for air in the pleural space prompting closed-chest evaluation and potential bronchoscopy to identify air-leak sources. |
J93.0 | Spontaneous tension pneumothorax | Emergent indication for airway control, anesthetic management, and immediate intrathoracic procedures. |
J93.11 | Primary spontaneous pneumothorax | Common presentation in young patients evaluated with closed-chest procedures and bronchoscopy under anesthesia. |
J93.12 | Secondary spontaneous pneumothorax | Occurs with underlying lung disease; anesthesia planning accounts for reduced pulmonary reserve. |
J93.82 | Other air leak | Used for air leaks not otherwise specified; clinically relevant for intra-procedural assessment and management. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00522 | Under anesthesia for intrathoracic procedures, closed chest procedure involving needle biopsy of the pleura | Performed when a pleural biopsy is obtained during the same anesthetic as bronchoscopy/closed-chest evaluation. |
00524 | Under anesthesia for intrathoracic procedures, closed chest procedure of pneumocentesis | Used when therapeutic or diagnostic pneumocentesis is performed under the same anesthetic for pneumothorax or pleural effusion. |
00540 | Under anesthesia for intrathoracic procedures, thoracotomy | Related for cases that convert from a closed chest procedure to open thoracotomy requiring a different anesthesia code and higher complexity. |