Summary & Overview
CPT 33285: Insertable Cardiac Rhythm Monitor Insertion and Programming
CPT code 33285 covers the implantation and programming of a self‑contained electrode cardiac rhythm monitor placed into a subcutaneous pocket. This code is used for long‑term cardiac rhythm surveillance when clinicians need continuous or event‑driven monitoring to diagnose arrhythmias, syncope, cryptogenic stroke workup, or unexplained palpitations. Nationally, utilization of insertable monitors has increased with advances in device miniaturization and remote telemetry, making accurate coding and coverage guidance important for providers and payers.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a clinical and billing overview of the procedure, typical sites of service, and the common modifiers associated with the code. The publication summarizes benchmark coverage considerations, coding guidance, and the clinical contexts in which 33285 is commonly reported. Where specific data elements were not provided in the input, the text notes that information is not available. This national summary is intended to inform billing staff, clinical teams, and policy analysts about the clinical purpose and setting for CPT code 33285, and to frame where further payer‑specific policy review may be needed.
Billing Code Overview
CPT code 33285 describes the insertion of a cardiac rhythm monitor with self–contained electrodes into a subcutaneous pocket and programming of the device per manufacturer directions. This procedure involves placement of a long-term implantable or insertable cardiac monitoring device designed to record and transmit cardiac rhythm data for diagnostic evaluation.
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Service type: Implantation and programming of an insertable cardiac rhythm monitor
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Typical site of service: Ambulatory surgical center or hospital outpatient department, performed in a sterile procedure room with cardiac monitoring capabilities
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 55–75-year-old adult referred for implantation of an insertable cardiac rhythm monitor (ICM) because of unexplained syncope, recurrent palpitations, or cryptogenic stroke with suspected occult atrial fibrillation. The outpatient workflow begins with a cardiology evaluation documenting symptoms, ruling out reversible causes, and obtaining informed consent. Pre-procedure orders include sterile prep, local anesthesia with conscious sedation as needed, and device programming parameters per manufacturer. In a minor procedure room or ambulatory surgery center, the provider creates a small subcutaneous pocket, inserts the self–contained electrode ICM (33285), secures and tests the device, and programs sensing parameters. Post-procedure, the patient receives wound care instructions, remote monitoring setup, and a follow-up visit for device interrogation and wound check. Typical sites of service are ambulatory surgery centers, physician office procedure suites, or hospital outpatient departments.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default or unspecified — not commonly used clinically | Rarely used; generally not applied on claims |
11 |