Last updated: July 14, 2026
The 2026 Medicare Physician Fee Schedule changed how cardiology practices and EP clinics bill for remote monitoring services, which directly affects monthly revenue. These updates define which encounters qualify for reimbursement and how much each interaction pays.
CPT 99454 (device supply, 16+ days of readings) carries a 2026 national average Medicare reimbursement rate of $48, while the 2026 Medicare reimbursement rate for CPT 99457 is $51.77. Until 2026, practices had no way to bill for patients who transmitted data for fewer than 16 days or engaged for less than 20 minutes, so that clinical work went uncompensated.
Two new codes now address this gap. CPT 99445 covers device supply for 2–15 days of readings at $48, and CPT 99470 covers 10–19 minutes of treatment management at $26. These short-duration codes are mutually exclusive with their standard counterparts in a given month, so practices must track which tier applies for each patient to avoid billing errors.
On the cardiac-specific side, the 2026 Medicare updates introduced new RPM and RTM codes for shorter monitoring durations (2–15 days), while CPT 93298 continues to apply to more than 15 days up to 30 days, which creates a meaningful change for post-ablation monitoring and AF burden assessment. CIED remote monitoring typically bills under cardiac-specific codes 93294–93298 rather than general RPM codes. Practices that manage both implantable devices and chronic disease patients therefore juggle two distinct billing frameworks at once.
Rhythm360 automates this tracking across both frameworks, ensuring that every qualifying transmission maps to the correct CPT code before a claim is submitted. Accurate code selection then sets the stage for the next challenge, which is preventing denials caused by documentation and process gaps.
Claim denials represent one of the most preventable sources of revenue loss in remote monitoring programs. Automated claim scrubbing can raise first-pass acceptance rates to 98% or higher compared to the 80–85% baseline typical of manual review. For a cardiology practice managing hundreds of remote monitoring patients, that improvement converts directly into tens of thousands of dollars in recovered revenue each year.
The most common denial triggers in remote monitoring are well-documented: missing 16-day data requirements for CPT 99454, insufficient time documentation for 99457/99458, prior authorization issues, coding errors, and incorrect diagnosis linkage. Eighty-six percent of denials are classified as potentially avoidable, which means they stem from documentation or workflow issues rather than medical necessity disputes. AI-driven automation reduces these avoidable errors by closing the manual gaps that create inconsistent documentation.
Rhythm360 addresses these failure points through AI-powered alert triage that reduces critical event response times by up to 80%, combined with bi-directional EHR integration with Epic, Cerner, and Athenahealth. Patient data flows automatically into the clinical record, and billing documentation is generated at the point of care, so staff no longer re-enter information across multiple systems. University of Chicago Medicine reported improved billing and accountability for patients after integrating Rhythm360, which reflects what automated documentation workflows deliver at scale. The most frequent documentation gap behind these denials centers on a single code: CPT 99457.
CPT 99457 is among the most frequently underbilled codes in remote monitoring programs because the time-tracking requirements are difficult to satisfy manually, even when staff perform the work. CPT 99457 is billed monthly for the first 20 minutes of clinical staff time reviewing RPM data and communicating with the patient or caregiver, and it requires specific time documentation plus notes supporting the interactive communication requirement.
The 20-minute threshold functions as a strict cutoff. If a patient reached 17 minutes of engagement instead of 20, that time was historically unreimbursable. The new CPT 99470 code, which pays $26 for 10–19 minutes, now partially addresses this gap. Practices still need to document which tier applies for each patient each month, and they must also track additional time for 99458. Many practices miss legitimate reimbursement for CPT 99458 because additional clinical time beyond the first 20 minutes is not consistently tracked or reviewed.
Rhythm360 resolves this through automated time-logging that captures clinical staff engagement at the session level, generates compliant documentation tied to each patient encounter, and flags patients approaching billing thresholds before the month closes. This creates a systematic workflow that converts performed clinical work into submitted claims without asking staff to reconstruct time records after the fact. Once a practice has mastered documentation for a single service line, the next revenue frontier involves recognizing that many patients qualify for multiple billable programs at the same time.
Watch Rhythm360’s automated CPT documentation in action during a live walkthrough.
The most significant revenue opportunity for cardiology practices in 2026 comes from stacking complementary service lines for the same patient population rather than improving a single program in isolation. Patients with implantable devices frequently carry comorbid diagnoses of heart failure and hypertension, which creates legitimate billing opportunities across both CIED-specific codes and RPM chronic disease codes in the same month.
The 2024 NYU Langone micro-costing study found that hypertension RPM generated an average ROI of 22.2% at 55% patient compliance. When practices layer this program onto an existing CIED monitoring service, the returns stack instead of replacing one another. RPM-adopting practices experienced a 20% increase in Medicare revenue compared to matched controls, which illustrates the impact of adding a chronic disease line.
Rhythm360 supports this multi-modality model through distinct but integrated service lines: Rhythm-CIED for implantable device monitoring and HF/HTN for remote physiologic monitoring of chronic cardiometabolic conditions. Both operate within a single platform and maintain data reliability at greater than 99.9% transmissibility, achieved through redundant data feeds, computer vision, and AI-powered extrapolation that fills gaps when OEM servers experience downtime. University of Chicago Medicine managed more than 73,000 reports annually through Rhythm360 in 2025, averaging more than 18,000 reports per quarter, which demonstrates that the platform sustains this data integrity at high volume. Practices that have implemented both service lines through Rhythm360 have seen revenue increases of up to 300%.
RhythmScience is the company, and Rhythm360 is its platform. Understanding what the platform delivers and how it compares to operating without a unified solution clarifies the financial case for adoption. Other platforms exist in this space, including Paceart, Murj, PaceMate, Implicity, Rhythm Management Group, and Octagos, but the comparison below focuses on what RhythmScience and Rhythm360 specifically offer. The table below quantifies the operational and financial differences between fragmented OEM workflows and a unified platform approach across six key performance metrics.
| Metric | Without Rhythm360 (Fragmented OEM Approach) | With Rhythm360 |
|---|---|---|
| First-pass claim acceptance rate | 80–85% (manual review baseline) | 98%+ (the automated scrubbing improvement discussed earlier) |
| Data transmissibility | Variable, dependent on individual OEM uptime | >99.9% (the redundant-feed architecture described earlier) |
| Critical alert response time reduction | Baseline (manual triage) | Up to 80% reduction (RhythmScience platform specification) |
| Revenue lift potential | Baseline | Up to 300% (RhythmScience platform specification) |
| EHR integration | Manual transcription across OEM portals | Bi-directional with Epic, Cerner, Athenahealth, eClinicalWorks, and others (RhythmScience platform specification) |
| Implementation timeline | N/A | A few days to a few weeks (RhythmScience platform specification) |
A simple ROI illustration shows how these metrics translate into dollars. A practice with 200 remote monitoring patients billing CPT 99457 at $54 and CPT 99454 at $48 per patient per month generates a theoretical gross of $20,400 monthly. If the practice’s current denial rate is 15% and Rhythm360 reduces it to under 5%, the recovered revenue on denied claims alone represents thousands of dollars each month before accounting for newly captured 99458 and 99470 codes. That recovered revenue compounds over a year and creates a meaningful improvement in practice margins.
A 30-day rollout with Rhythm360 follows a structured sequence:
Implementation typically takes a few days to a few weeks, depending on EHR complexity and the number of OEM portals being consolidated. The process includes EHR integration setup, patient population import, and staff onboarding. Rhythm360 operates as a cloud-based, vendor-neutral platform, so no on-premise hardware installation is required, which shortens deployment compared to legacy systems.
Rhythm360 tracks patient engagement at the session and day level and automatically determines which billing tier applies each month. When a patient transmits data for 2–15 days rather than 16 or more, the platform flags the appropriate short-duration code instead of allowing the encounter to go unbilled. The same logic applies to clinical time: if staff engagement reaches 10–19 minutes, the platform documents the 99470 tier rather than leaving the time uncompensated. This automation prevents the mutual exclusivity errors that occur when practices attempt to manage these distinctions manually.
Rhythm360 includes a secure, HIPAA-compliant mobile application that allows clinicians to review transmissions, sign reports, and coordinate care from their smartphones. This capability is particularly relevant for weekend and after-hours coverage, where a critical arrhythmia alert, such as new-onset atrial fibrillation or a ventricular tachycardia episode, requires immediate clinical response even when the clinician is off-site.
Rhythm360 uses a SaaS-based pricing model that scales based on clinic size and platform usage. The structure avoids prohibitive setup fees aimed only at enterprise clients. Solo practitioners and small EP clinics can access the same vendor-neutral infrastructure and automated CPT documentation capabilities as large integrated health systems, with investment calibrated to the volume of patients enrolled.
Rhythm360 is vendor-neutral and integrates with all major cardiac implantable electronic device manufacturers, including Medtronic, Boston Scientific, Abbott, and Biotronik, among others. Data is ingested via API, HL7, XML, and PDF parsing through computer vision, then normalized into a single unified dashboard. This consolidation removes the need for staff to maintain separate logins and workflows for each OEM portal.
The financial case for a vendor-neutral arrhythmia monitoring platform in 2026 rests on measurable performance: 96–99% first-pass claim acceptance rates versus 82–88% for manual workflows, up to 300% revenue lift from improved CPT capture and multi-modality service line stacking, and an 80% reduction in critical alert response times that protects both patients and practice liability. The 2026 Medicare code updates, including CPT 99445 and 99470, create new billing opportunities that fragmented OEM workflows will routinely miss.
Rhythm360 by RhythmScience consolidates CIED and HF/HTN monitoring into a single, AI-powered, vendor-neutral platform with greater than 99.9% data transmissibility, bi-directional EHR integration, and automated CPT documentation designed to capture every billable event. As the University of Chicago Medicine case study demonstrated, the platform scales to high-volume environments while maintaining billing accuracy and clinical workflow efficiency.
Practices ready to stop leaving revenue on the table can move from decision to go-live within weeks. Schedule a personalized demo to see CPT automation, denial reduction workflows, and multi-modality revenue modeling tailored to your patient population.
