CPT 93298 Billing: Subcutaneous Monitor Remote

CPT 93298 covers physician review of remote rhythm data from a subcutaneous cardiac rhythm monitor across a period of up to 30 days. Like its sibling 93297, it runs on a 30-day clock, and the periods left unbilled usually outnumber the ones denied.

What CPT 93298 covers

93298 is remote interrogation device evaluation of a subcutaneous cardiac rhythm monitor system, up to 30 days, including analysis of recorded heart rhythm data, with analysis, review(s) and report(s) by a physician or other qualified health care professional.

For Medicare, the technical component travels on this code: billed globally when one entity provides both parts, or split with modifier 26 (professional) and TC (technical) when two entities do. The old technical code 93299 and the Medicare code G2066 are not used for that.

How the remote device monitoring family is organised

Pacemakers and defibrillators use a professional code and a technical code. Implantable monitors changed for Medicare in 2024, so read the last three lines carefully.

93294: pacemaker system, remote, physician analysis, review and report. Up to 90 days.
93295: implantable defibrillator system, remote, physician analysis, review and report. Up to 90 days.
93296: pacemaker or defibrillator system, remote, technical. Data acquisition, receipt of transmissions, technician review, technical support and distribution of results. Up to 90 days.
93297: implantable cardiovascular physiologic monitor, remote evaluation. Up to 30 days.
93298: subcutaneous cardiac rhythm monitor, including implantable loop recorders, remote evaluation. Up to 30 days.
93299: CPT's technical-only code for those two monitor types. Medicare does not use it. CMS created G2066 for the technical component in 2020, deleted G2066 for 2024, and accepted the practice-expense inputs on 93297 and 93298 instead. For Medicare the technical component is reported with modifier TC on 93297 or 93298.

Two different clocks. Pacemakers and defibrillators run on a 90-day period; implantable monitors run on 30 days. Billing either one on the wrong cycle is the most common denial in this family.

Not the same as remote physiologic monitoring

These codes are frequently confused with the remote physiologic monitoring family (99453, 99454, 99457 and 99458), which covers monitoring of physiologic parameters such as weight, blood pressure and pulse oximetry using a supplied device.

They are different services with different rules, different time periods and different documentation. A cardiac implantable device being monitored remotely belongs in the 93294 to 93299 family. Billing it under the RPM codes, or the reverse, produces denials that look mysterious until the families are separated.

Reimbursement context

Remote monitoring is a recurring revenue stream rather than a one-off procedure, so the economics depend on billing every eligible period exactly once.

Medicare pays for this code under the Physician Fee Schedule, and the amount depends on where you practise. Each code carries relative value units for physician work, practice expense and malpractice, each adjusted by a geographic practice cost index (GPCI) for the locality, and the total is multiplied by the conversion factor:

(work RVU × work GPCI + practice expense RVU × PE GPCI + malpractice RVU × MP GPCI) × conversion factor

For 2026 the conversion factor is $33.4009 for practitioners who are not qualifying APM participants and $33.5675 for qualifying APM participants, as set in the CY 2026 Physician Fee Schedule final rule (CMS-1832-F; see the CMS fact sheet). Because the RVUs differ by code and the GPCIs differ by locality, what your practice is paid will differ from any national average. Pull the RVUs and the payment for your own locality from the CMS Physician Fee Schedule Look-Up Tool.

Documentation requirements

The device type and model, and the date of implant.
At least one transmission received and reviewed within the 30-day period.
The dates the monitoring period began and ended.
The data elements reviewed, not merely that a transmission arrived.
A dated, signed report of the analysis and any clinical action taken, where the professional component is billed.
Evidence of the technical infrastructure and technician review, where the technical component is billed.
Confirmation that the period has not already been billed for this patient and device.

Common denials and the exact fix

Reported more than once in the same period

The most common denial in this family. The code covers the whole monitoring period, so a second claim inside it is a duplicate no matter how many transmissions arrived.

Fix: track the period start date per patient and per device, and let the billing system rather than the calendar month drive the claim.

No transmission received in the period

A period with no transmission does not support the code, even where the equipment was in place and the patient was enrolled.

Fix: confirm at least one transmission was received and reviewed before billing, and work the non-transmitting patient list as an operational task rather than a billing one.

Billed on a 90-day cycle

Subcutaneous rhythm monitors run on a 30-day period.

Fix: bill monthly rather than quarterly for this device population.

Rhythm findings not documented

The code pays for analysis of recorded heart rhythm data, which means the report needs to say what the rhythm data showed.

Fix: record the episodes reviewed, the rhythm findings and any clinical action taken.

93299 or G2066 billed for the technical component

G2066, the Medicare code created in 2020 for this technical component, was deleted for 2024, and CMS accepted the practice-expense inputs on 93297 and 93298 instead. Medicare does not use 93299 as a separate line.

Fix: for Medicare, report the technical component with modifier TC on 93297 or 93298, or bill the code globally when one entity provides both parts. Check whether each commercial payer still accepts 93299.

Wrong monitor code selected

93298 is the subcutaneous rhythm monitor; 93297 is the implantable cardiovascular physiologic monitor.

Fix: select from the device record.

Modifier rules

93294, 93295, 93296: no 26 or TC. The professional and technical work is split through separate codes, so appending a component modifier is redundant and can cause a rejection.
93297, 93298: for Medicare, modifier 26 (professional) and TC (technical) apply when two entities provide the two parts. Billed globally, with no modifier, when one entity provides both.
59 / XE / XP / XS / XU: rarely applicable, and never a route to reporting the same monitoring period twice.
25: on an E/M where a separately identifiable visit occurred, never on the monitoring code.
GY / GA: where a service is statutorily excluded or an advance beneficiary notice is on file, per payer instruction.

NCCI bundling edits

93298 with 93299: Medicare does not use 93299. The technical component is modifier TC on 93298.
93298 reported twice in one 30-day period: duplicate.
93298 with 93297: report the code matching the implanted device.
93298 with the pacemaker and defibrillator remote codes: different family and different period.

Frequently asked questions

How often can CPT 93298 be billed?

Once per 30-day monitoring period, provided rhythm data was received and reviewed within that period. Billing it on the 90-day cycle used for pacemakers and defibrillators leaves eligible periods unbilled.

What must the report show for 93298?

The heart rhythm data reviewed for the period, the episodes identified, the findings, and any clinical action taken, in a dated and signed report. Recording only that a transmission was received does not establish the analysis the code pays for.

What is the technical component for 93298?

For Medicare, modifier TC on 93298 itself. CMS deleted the technical code G2066 for 2024 and accepted the practice-expense inputs on 93297 and 93298, and Medicare does not use CPT's technical-only code 93299. Some commercial payers still accept 93299, so check each payer's policy.

Sources

American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual and quarterly edit tables, cms.gov.
Centers for Medicare & Medicaid Services, Physician Fee Schedule Look-Up Tool, cms.gov.
American College of Cardiology, acc.org. AAPC coding resources, aapc.com.

CPT® is a registered trademark of the American Medical Association. Code descriptors are summarised here for billing guidance and are not a substitute for the current CPT codebook. Payer rules and NCCI edits change quarterly; verify against your own payer policy before submission.

Related codes

CPT 93297. Remote implantable physiologic monitor, 30 days.
CPT 93299. Remote monitor technical component, 30 days.
CPT 93294. Remote pacemaker check, physician component.

CPT 93298: Remote Subcutaneous Cardiac Rhythm Monitor Interrogation