Summary & Overview
CPT 00528: Anesthesia for Closed Chest Procedures, Mediastinoscopy/Thoracoscopy
CPT code 00528 covers anesthesia for closed chest procedures, including mediastinoscopy and diagnostic thoracoscopy without the use of one lung ventilation. This code is significant for hospitals and anesthesia providers nationwide, as it addresses a common set of diagnostic and surgical interventions in thoracic medicine. The typical site of service is the inpatient hospital, reflecting the complexity and clinical importance of these procedures.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. The publication provides an overview of payer coverage, clinical context, and relevant billing considerations for CPT 00528. Readers will gain insight into national benchmarks, policy updates, and the role of anesthesia in intrathoracic procedures. The summary also highlights associated modifiers and taxonomies, as well as common ICD-10 diagnoses linked to these services. Related CPT codes are discussed to provide a comprehensive understanding of anesthesia billing for thoracic procedures.
This article is intended for healthcare administrators, billing professionals, and clinicians seeking up-to-date information on anesthesia coding and payer policies for closed chest procedures.
CPT Code Overview
CPT 00528 is designated for anesthesia services provided during closed chest procedures, specifically mediastinoscopy and diagnostic thoracoscopy that do not require one lung ventilation. This code falls under the Anesthesia – Intrathoracic Procedures service type. The typical site of service for these procedures is the inpatient hospital setting (POS 21). These procedures are critical for diagnosing and managing thoracic conditions, and the anesthesia component ensures patient safety and comfort during complex intrathoracic interventions.
Clinical & Coding Specifications
Clinical Context
A patient is admitted to an inpatient hospital for evaluation of suspected mediastinal or thoracic pathology, such as a mass or lymphadenopathy. The patient has a history of cardiovascular disease, which may include atherosclerotic heart disease, angina, or heart failure. The procedure performed is a closed chest mediastinoscopy or diagnostic thoracoscopy, not requiring one lung ventilation. An anesthesia provider, such as an anesthesiologist or cardiac anesthesiologist, administers anesthesia to ensure patient comfort and safety during the intrathoracic procedure. The clinical workflow involves preoperative assessment, induction and maintenance of anesthesia, intraoperative monitoring, and postoperative care.
Coding Specifications
-
Modifiers:
-
QS: Monitored anesthesia care service. Used when the anesthesia provider is delivering monitored anesthesia care rather than general anesthesia. -
QX: CRNA service with medical direction by a physician. Used when a Certified Registered Nurse Anesthetist (CRNA) is providing the anesthesia service under the medical direction of a physician.
-
-
Provider Taxonomies:
Taxonomy Code Specialty Name 207L00000XAnesthesiology 207RC0000XCardiovascular Disease Physician 207RA0000XCardiac Anesthesiologist
These taxonomies represent providers specializing in anesthesia, cardiovascular disease, and cardiac anesthesia, all of whom may be involved in the delivery of anesthesia for intrathoracic procedures.
Related Diagnoses
-
I25.10: Atherosclerotic heart disease of native coronary artery without angina pectoris- Relevant for patients with underlying coronary artery disease undergoing thoracic procedures, as anesthesia management may be affected by cardiac status.
-
I20.9: Angina pectoris, unspecified- Indicates a history of chest pain, which may necessitate careful anesthesia monitoring during intrathoracic procedures.
-
I21.9: Acute myocardial infarction, unspecified- Patients with recent or ongoing myocardial infarction require specialized anesthesia care during thoracic interventions.
-
I50.9: Heart failure, unspecified- Heart failure impacts perioperative risk and anesthesia management for thoracic procedures.
-
I48.91: Unspecified atrial fibrillation- Atrial fibrillation is a common arrhythmia in patients with cardiovascular disease, relevant for anesthesia risk assessment and intraoperative monitoring.
Related CPT Codes
| CPT Code | Description |
|---|---|
00529 | Anesthesia for closed chest procedures; mediastinoscopy and diagnostic thoracoscopy utilizing one lung ventilation |
00524 | Anesthesia for closed chest procedures |
00540 | Anesthesia for thoracotomy procedures involving lungs, pleura, diaphragm and mediastinum (including surgical thoracoscopy); not otherwise specified |
-
00529is used when the procedure requires one lung ventilation, which is a more complex anesthesia technique compared to00528. -
00524covers anesthesia for closed chest procedures but does not specify mediastinoscopy or thoracoscopy, making it a broader code. -
00540is used for thoracotomy procedures, including surgical thoracoscopy, and is an alternative when the procedure involves the lungs, pleura, diaphragm, or mediastinum.
These codes may be used as alternatives depending on the specific procedure performed and the anesthesia requirements.
National Reimbursement Benchmarks
For CPT code 00528, national mean rates among commercial payers are notably higher than the average commercial benchmark (BUCA), with Blue Cross Blue Shield and Cigna both exceeding $450.00. The BUCA mean rate stands at $205.66, while UnitedHealth Group is significantly lower at $65.59. Medicare data is not available in the input.
Rate dispersion varies considerably across payers. UnitedHealth Group shows the tightest range between the 25th and 75th percentiles ($25.51), indicating less variability in contracted rates. In contrast, Cigna exhibits the widest spread ($603.50), reflecting substantial rate variation. Blue Cross Blue Shield and Aetna also display broad ranges, suggesting diverse reimbursement levels across providers.
The table and chart below present a detailed breakdown of national benchmarks for each payer, including mean rates and percentile values.
State Benchmarks
State: AK1 / 50
Alaska Benchmarks
Alaska exhibits a wide spread in reimbursement rates for CPT code 00528, with Blue Cross Blue Shield showing the largest range between the 25th and 75th percentiles ($173.40), while Aetna, Cigna, and UnitedHealth Group display minimal rate variation. The mean rates for Blue Cross Blue Shield and BUCA in Alaska are significantly higher than their respective national averages, whereas Cigna and UnitedHealth Group are below national benchmarks.
The table and chart below present the full breakdown of mean rates and percentile values by payer for Alaska, highlighting the substantial differences in reimbursement across payers.
Key Insights for Alaska
- Blue Cross Blue Shield is the highest paying payer for CPT 00528 in Alaska, with a mean rate of $513.87.
- UnitedHealth Group offers the lowest mean rate at $75.12.
- Alaska's mean rates for most payers, especially Blue Cross Blue Shield and BUCA, are notably higher than national averages, while Cigna and UnitedHealth Group are below national benchmarks.
Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.