Cardiac Device Billing: Pacemaker and ICD Rules

Base device implantation codes

Cardiac rhythm device implants split by chamber and by device type.

Pacemaker implantation

• CPT 33206 — insertion of new or replacement permanent pacemaker, transvenous electrode(s); single-chamber ventricular
• CPT 33207 — single-chamber atrial
• CPT 33208 — dual-chamber (atrial and ventricular)

The 2026 Medicare national unadjusted physician rate for CPT 33208 is approximately $456, based on 8.52 work RVUs and the 2026 conversion factor of $33.4009. Single-chamber codes (33206, 33207) pay less than 33208 because RVUs are lower.

ICD implantation

• CPT 33249 — insertion or replacement of permanent implantable cardioverter-defibrillator system with transvenous lead(s), single or dual chamber

ICD implantation carries substantially higher RVUs than pacemaker implantation, reflecting the increased procedural complexity and the electrophysiology testing typically performed at implant.

Biventricular / CRT devices

• CPT 33224 — insertion of pacing electrode, cardiac venous system, for left ventricular pacing, at time of insertion of implantable defibrillator or pacemaker pulse generator
• CPT 33225 — same, at time of insertion of new pacemaker or pacing cardioverter-defibrillator with pacing capability, all leads

CRT device coding pairs the LV lead placement code with the base pulse generator code.

The KX modifier requirement

Every pacemaker claim under CPT 33206, 33207, or 33208 requires modifier KX. The National Coverage Determination for single and dual chamber permanent cardiac pacemakers mandates modifier KX as the physician's certification that coverage criteria are met. Medicare returns claims without modifier KX as unprocessable before any medical review begins. Unprocessable status is not appealable; the claim must be resubmitted with the modifier.

ICD claims under CPT 33249 have their own NCD-driven documentation requirements but do not always require modifier KX in the same way. Practices should verify the current NCD language and MAC-specific billing article requirements before submitting.

Global period rules

All cardiac device implantation codes (33206-33208, 33249) carry a 90-day global period. Included in the initial payment:

• Routine postoperative wound checks
• Suture removal or wound care
• Follow-up visits related to the implanted device within 90 days
• Routine device programming at initial follow-up

Billing an E&M code during the global period for routine device follow-up generates a denial. E&M within the global period requires modifier 24 (unrelated E&M during a global period) with documentation that the visit addressed a separate problem.

Device interrogation coding

Ongoing device management uses a separate code family:

In-person interrogation

• CPT 93288 — programming device evaluation, pacemaker
• CPT 93289 — programming device evaluation, ICD
• CPT 93291 — pacemaker or ICD, in-person and remote evaluation with analysis

Remote monitoring

• CPT 93293 — pacemaker, transtelephonic rhythm strip evaluation
• CPT 93294 — pacemaker, remote monitoring with analysis, up to 90 days
• CPT 93295 — ICD, remote monitoring, up to 90 days
• CPT 93296 — remote programming or interrogation, when performed

Each MAC publishes an LCD listing frequency limits: typically one in-person interrogation per 3-6 months for stable devices, and remote monitoring at 30-90 day intervals depending on device type. Billing more frequently than the LCD allows without documentation of clinical trigger produces frequency denials.

Revenue impact of device coding accuracy

A busy electrophysiologist performs 100-200 device implants annually plus 500-1,500 interrogations. Missing the KX modifier on a single implant returns the entire claim as unprocessable. Missing frequency documentation on quarterly interrogations reduces yield on the recurring revenue stream. Practices with mature device coding discipline typically capture 95%+ of billable interrogation revenue; those without often leave 15-25% uncaptured on the table.