Summary & Overview

CPT 33230: Implantable Cardioverter-Defibrillator Pulse Generator Placement

CPT code 33230 covers the surgical insertion of a new implantable cardioverter-defibrillator (ICD) pulse generator into a subcutaneous pocket on the front of the chest for patients with leads in two cardiac chambers. This procedure is a cornerstone intervention for management and prevention of serious arrhythmias and sudden cardiac arrest, carrying significant clinical and reimbursement implications across hospital and ambulatory surgical settings nationwide. Key payers considered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise overview of clinical intent and procedural context for CPT code 33230, followed by benchmarking on utilization and reimbursement where available, common modifiers used with the code, and policy or coverage considerations that influence billing and payment. The publication also summarizes typical sites of service and the service type to help coding professionals, practice managers, and revenue cycle staff align documentation and billing workflows with payer expectations and national practice patterns. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare33230CPTcardiac-surgeryimplantable-cardioverter-defibrillatorarrhythmiadevice-implantsurgical-procedureelectrophysiology

Billing Code Overview

CPT code 33230 describes the surgical placement of a new implantable cardioverter-defibrillator (ICD) pulse generator into a subcutaneous pocket on the anterior chest. The procedure is performed for patients who have leads positioned in two cardiac chambers and who require an implanted device for artificial regulation of heart rhythm to treat or prevent life-threatening arrhythmias.

Service type: Surgical implant of an implantable cardioverter-defibrillator pulse generator
Typical site of service: Inpatient or outpatient surgical setting, commonly performed in an operating room or cardiac catheterization/procedure suite

Clinical & Coding Specifications

Clinical Context

A 68-year-old male with ischemic cardiomyopathy and a history of sustained ventricular tachycardia is evaluated for replacement of a malfunctioning implantable cardioverter-defibrillator (ICD) pulse generator. He has existing transvenous leads in the right atrium and right ventricle placed previously and presents for elective device replacement due to elective battery depletion detected on device interrogation and recurrent appropriate therapies. Preoperative workflow includes device interrogation, informed consent, perioperative antibiotics, anticoagulation management, and marking the subcutaneous left pectoral pocket. In the operating room or cardiac catheterization lab, the patient is placed under monitored anesthesia care or general anesthesia, the old generator is explanted, leads are tested for integrity and thresholds, and a new dual‑chamber ICD pulse generator is implanted in a subcutaneous pocket with programming and final device testing prior to wound closure. Postoperative workflow includes device re‑interrogation, chest radiograph if indicated, wound care instructions, and coordination of follow‑up with the electrophysiology clinic.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier (default)	Use when no special circumstances apply.
`11`	Office/Outpatient E/M	Use when reporting an unrelated E/M service on the same day when payer requires modifier for separate service (rare for surgical CPTs).
`22`	Increased procedural services	Use when work or complexity substantially greater than typical for generator replacement.
`23`	Unusual anesthesia	Use when procedure requires general anesthesia for a patient who would normally tolerate local/monitored care.
`50`	Bilateral procedure	Not typically applicable to ICD generator placement; listed for completeness when bilateral devices are placed.
`51`	Multiple procedures	Use when additional distinct procedures are performed during the same operative session.
`52`	Reduced services	Use when service is partially reduced or not fully performed as described.
`53`	Discontinued procedure	Use when procedure is started but discontinued due to unforeseen circumstances.
`55`	Postoperative management only	Use when only post‑op care is provided by reporting clinician.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons.
`63`	Procedure performed on infants less than 4 kg	Rare; use only when applicable by payer rules.
`66`	Surgical team (multiple providers)	Use when a surgical team performs portions per facility/payer policy.
`78`	Return to OR for related procedure during global period	Use for unexpected return to the OR for related complication during the postoperative global period.
`79`	Unrelated procedure or service by same physician during global period	Not in provided list but commonly relevant; omitted per input constraints.

Taxonomy Code	Specialty	Notes
207RP0000X	Cardiac Electrophysiology	Electrophysiologists most commonly perform ICD generator replacements and programming.
208000000X	Cardiovascular Disease	Interventional cardiologists or cardiologists with device training may perform replacements.
207L00000X	Surgery - Cardiothoracic	Cardiothoracic surgeons may perform device implantation in complex cases.
163W00000X	Anesthesiology	Provides monitored anesthesia care or general anesthesia during the procedure.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I49.01`	Ventricular fibrillation	Indicates malignant ventricular arrhythmia for which an ICD is indicated.
`I49.02`	Ventricular tachycardia	Primary indication for ICD therapy for termination of life‑threatening VT.
`I44.2`	Atrioventricular block, complete	May coexist and inform dual‑chamber pacing needs in device selection.
`I50.22`	Chronic systolic (congestive) heart failure	Common underlying cardiomyopathy indication for ICD for primary prevention.
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Ischemic cardiomyopathy predisposes to arrhythmias treated with ICD.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`33207`	Insertion or replacement of single lead transvenous implantable defibrillator system; pulse generator only	Performed when a single‑lead ICD generator replacement is needed; related when lead configuration differs.
`33208`	Insertion or replacement of transvenous implantable defibrillator system, with single or dual chamber lead(s); pulse generator only	Closely related; alternative code when lead configurations vary—used for generator replacement services.
`93288`	Interrogation device evaluation (in person) with analysis, review and report, per patient encounter	Performed pre‑ and post‑implantation to evaluate device function and program settings.
`33249`	Removal of transvenous lead(s) with simple traction	Performed if leads require extraction during generator replacement; may be necessary for lead malfunction or infection.
`93010`	Electrocardiogram, routine ECG with interpretation and report	Often performed preoperatively and postoperatively for rhythm assessment.