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Billing code

G321A — Automatic Implantable Defibrillator - Programmable Including Electrocardiography, Interrogation And Reprogramming - Professional Component

Defibrillator check, programmable

Bill G321 for the professional component of checking a programmable implantable defibrillator: ECG, interrogation and reprogramming.

Watch for: A non-programmable defibrillator check is G317, not G321.

Code

G321A

Description

Automatic Implantable Defibrillator - Programmable Including Electrocardiography, Interrogation And Reprogramming - Professional Component

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Apr 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

Professional component for a programmable implantable defibrillator check: ECG, interrogation and reprogramming.

What it covers

G321 is the professional component for an automatic implantable defibrillator that is programmable, including electrocardiography, interrogation and reprogramming (J18).

No technical component is listed for this service. A non-programmable defibrillator check (interrogation and analysis) is G317 (J18).

Billing rules

• You must personally interpret the results to bill the professional component (J1).
• If you cannot personally supervise or monitor the procedure, those parts of the professional component may be delegated to another physician; the interpretation may not (J1).
• The listed fee includes the electrocardiography (J18).

Related codes: G317, G283, G180, G307

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Electrocardiography (ECG), page J18.

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