Summary & Overview

CPT 0659T: Supersaturated Oxygen Infusion for Myocardial Salvage

CPT code 0659T designates an adjunctive catheter-based infusion of supersaturated oxygen into a coronary vessel performed alongside a separately reportable revascularization procedure during an acute myocardial infarction. The therapy is intended to limit myocardial injury by delivering high-oxygen-content blood to ischemic myocardium after or during reperfusion. Nationally, this code matters because it captures a specialized, procedure-dependent intervention provided in acute cardiac catheterization settings and affects hospital and payer billing for advanced myocardial salvage techniques.

Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for use of CPT code 0659T, typical sites of service, and the procedure’s relationship to primary revascularization services. The publication summarizes common billing practices and modifiers associated with adjunctive acute-care cardiac procedures, reimbursement benchmarks where available, and recent policy and coverage themes relevant to adjunctive myocardial therapies.

The content is organized to help clinical coders, hospital billing staff, and policy analysts understand how CPT code 0659T is reported, when it applies in the course of acute myocardial infarction care, and what operational factors (site of service and inclusion of imaging) influence coding and payer interactions.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 0659Tsupersaturated oxygen infusionmyocardial salvagecardiac catheterizationacute myocardial infarctionendovascular therapyinterventional cardiologyhospital billingprocedure coding

Billing Code Overview

CPT code 0659T describes a catheter-based procedure performed in conjunction with a separately reportable primary revascularization service for an acute myocardial infarction. The provider introduces a catheter into a coronary vessel to infuse supersaturated oxygen with the clinical goal of reducing myocardial (heart muscle) damage during or after reperfusion of an occluded coronary artery or graft. The code includes imaging necessary to complete the procedure.

Service type: Endovascular adjunctive myocardial salvage therapy
Typical site of service: Hospital cardiac catheterization laboratory or other acute care interventional setting

Clinical & Coding Specifications

Clinical Context

A 62-year-old male presents to the emergency department with acute onset chest pain, diaphoresis, and ST-elevation on ECG consistent with an acute ST-elevation myocardial infarction (STEMI). Emergent coronary angiography demonstrates an occluded left anterior descending coronary artery. The interventional cardiology team performs primary percutaneous coronary intervention (PCI) with balloon angioplasty and stent placement to restore flow. In conjunction with that separately reportable coronary revascularization procedure, the provider advances a dedicated infusion catheter into the treated coronary vessel and delivers supersaturated oxygen (SSO2) therapy to the ischemic myocardium to reduce infarct size. The procedure includes catheter placement, infusion of supersaturated oxygen, and fluoroscopic imaging to confirm catheter position and therapy delivery. Typical monitoring includes hemodynamic observation in the cardiac cath lab, post-procedure telemetry in a coronary care unit, and documentation of concomitant thrombolytic or antiplatelet therapy. Typical site of service is an inpatient cardiac catheterization laboratory within a hospital during an acute myocardial infarction admission.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or intensity substantially exceeds typical for the primary revascularization procedure and SSO2 infusion contributes to additional complexity.

Taxonomy Code	Specialty	Notes
207RC0000X	Interventional Cardiology	Providers who perform coronary interventions including PCI and catheter-based myocardial therapies.
207RP1001X	Cardiovascular Disease	General interventional cardiologists who manage acute MI and coordinate SSO2 adjunct therapy.
207RG0300X	Critical Care Medicine	Intensivists involved in peri-procedural hemodynamic management for high-risk patients.
207PH0204X	Thoracic Surgery	Cardiac surgeons who may be involved when surgical backup or hybrid approaches are needed.
363L00000X	Vascular/Interventional Radiology	Interventional radiologists who may assist with catheter placement or imaging in specialized centers.

ICD-10 Code	Description	Clinical Relevance
`I21.01`	ST elevation (STEMI) myocardial infarction of anterior wall	Common indication for emergent PCI with adjunctive SSO2 infusion to reduce infarct size in the affected territory.
`I21.09`	ST elevation (STEMI) myocardial infarction of other sites	STEMI at other coronary territories where SSO2 infusion may be applied after revascularization.
`I21.3`	ST elevation (STEMI) myocardial infarction of unspecified site	Used when STEMI site is not specified but patient undergoes revascularization and adjunctive therapy.
`I21.4`	Non-ST elevation (NSTEMI) myocardial infarction	NSTEMI patients undergoing urgent revascularization may be considered for adjunct myocardial salvage therapies in select scenarios.
`I22.0`	Subsequent ST elevation (STEMI) myocardial infarction of anterior wall	Used for repeat infarction during same hospitalization where repeat intervention and adjunct therapies may be needed.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`92928`	Percutaneous transcatheter placement of intracoronary stent(s), with coronary angioplasty when performed; single major coronary artery or branch	Often billed for the primary PCI/stent placement performed to restore flow prior to or in conjunction with SSO2 infusion.
`92920`	Percutaneous transluminal coronary thrombectomy, with or without intracoronary thrombolytic infusion	May be performed before SSO2 infusion if a thrombectomy is required to restore perfusion in an occluded coronary vessel.
`93458`	Catheterization of coronary arteries, including intraprocedural injection(s) for coronary angiography, when performed; with left heart catheterization and imaging, with insertion of transseptal needle, with coronary angiography and/or stent placement	Represents comprehensive diagnostic and therapeutic catheterization services that accompany PCI and SSO2 catheter placement; imaging is included.
`99199`	Unlisted special service, procedure or report (used for novel or proprietary services when no specific CPT exists)	Historically used when reporting novel device-specific infusion services if no specific code applied; verify payer policies.
`36012`	Introduction of needle and/or catheter into a major vein, with radiological supervision and interpretation	May be used for additional access procedures or infusion line placement ancillary to SSO2 delivery when separate vascular access is required.

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