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CPT 00566: Anesthesia for Coronary Artery Bypass Graft, No Pump Oxygenator
CPT code 00566 designates anesthesia services for coronary artery bypass grafting (CABG) procedures performed without a pump oxygenator (off-pump CABG). Nationally, this code captures a specialized anesthetic service within cardiac surgery bundles and is relevant for hospital-based reimbursement, perioperative quality measurement, and resource planning for complex cardiac cases. Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare.
Readers will find a concise overview of clinical context for off-pump CABG anesthesia, typical sites of service, and the relationship of this code to related procedural codes for CABG and pump-assisted anesthesia. The publication summarizes common billing modifiers and associated anesthesia taxonomies, outlines typical ICD-10 diagnoses that justify the service, and lists clinically related surgical CPT codes. Benchmarks and payer coverage patterns are presented to help stakeholders understand how this code is used in practice and how it maps to cardiac surgical encounters. Policy updates, coding nuances, and documentation points relevant to anesthesia professionals and billing staff are also summarized to support accurate coding and claims processing.
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Billing Code Overview
CPT code 00566 describes anesthesia services provided for a coronary artery bypass graft (CABG) procedure performed without the use of a pump oxygenator. This service covers perioperative anesthesia care specific to coronary artery bypass grafting performed on the beating heart or otherwise not requiring cardiopulmonary bypass.
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Service type: Surgical anesthesia for coronary artery bypass grafting (off-pump CABG)
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Typical site of service: Inpatient operating room (cardiac surgery suite) or other hospital-based surgical setting
National Reimbursement Benchmarks
Commercial rates for CPT 00566 center around BUCA’s average commercial rate of $68.10, which provides a useful midpoint against individual payer distributions. Cigna shows a notably higher mean ($91.80) and median ($85.70) compared with BUCA, while Aetna and Blue Cross Blue Shield sit lower on median values ($50.00 and $57.10 respectively). UnitedHealth Group’s median ($64.00) and mean ($67.40) are close to BUCA, indicating alignment with the average commercial level.
Dispersion measured as the interquartile range (P75–P25) varies meaningfully: Cigna’s IQR is $52.50 (P75 $120.00 minus P25 $67.50), indicating the widest spread among payers. Blue Cross Blue Shield’s IQR is $37.10 and BUCA’s IQR is $37.20, both showing moderate dispersion. Aetna’s IQR is $38.00 and UnitedHealth Group’s IQR is $29.00, with UnitedHealth Group the tightest distribution around its central tendency.