Last updated: July 14, 2026
Complete every step before submitting a claim. A single missing component invalidates the entire billing episode. In 2024, OIG audited Medicare RPM enrollees and found that 43% lacked at least one required clinical billing component.
Each of these steps feeds directly into the CPT code selection covered next. Getting the transmission-day count and time logs right here determines which billing tier a claim can support.
The 2026 Medicare Physician Fee Schedule Final Rule (CMS-1832-F) introduced two new CPT codes that lowered prior billing thresholds. CPT 99445 covers device supply for 2 to 15 days of transmitted data, and CPT 99470 covers the first 10 to 19 minutes of treatment management. Both new codes reimburse at lower rates than their higher-threshold counterparts, so practices need to track which threshold each patient will realistically hit before choosing a code. The rate table below shows the reimbursement gap at stake.
| CPT Code | Service Description | 2026 Medicare Rate (Non-Facility) | Rhythm360 Automation |
|---|---|---|---|
| 99453 | Device setup & patient education (once per device type per year) | $21.71 | Consent and education checklist auto-generated at enrollment |
| 99445 | Device supply, 2–15 transmission days per 30-day period | $47–$52 | Transmission day counter flags short-period eligibility |
| 99454 | Device supply, 16–30 transmission days per 30-day period | $47–$52 | Automated 16-day threshold alert and log export |
| 99470 | Treatment management, first 10–19 minutes (new 2026) | $26 | Time-stamped staff activity log with code selector |
| 99457 | Treatment management, first 20 minutes | $51.77 | Interactive communication tracker with cumulative timer |
| 99458 | Treatment management, each additional 20 minutes | $41.42 | Add-on time capture prevents missed 99458 revenue |
Consent documentation must include agreement to participate, single-provider acknowledgment, cost-sharing disclosure (typically 20% coinsurance), and the right to revoke. CMS MLN Telehealth & Remote Monitoring guidance (December 2025) requires services to be furnished only by physicians or NPPs who can bill E/M services, with no double-counting of interpretation time across RPM, RTM, CCM, TCM, BHI, PCM, or CPM.
Treatment management codes are the most audit-vulnerable component of RPM billing. Vague time entries such as "reviewed RPM data" create significant audit liability because CMS requires the specific date, duration in minutes, and a detailed description of activities performed. The Rhythm360 monthly note template below captures every required element.
| Documentation Element | 99470 Requirement (10–19 min) | 99457 Requirement (20+ min) | Rhythm360 Field |
|---|---|---|---|
| Date of each activity | Required with timestamp | Required with timestamp | Auto-stamped activity log |
| Duration in minutes | 10–19 min total; document as exact figure, not "less than 20" | 20+ min cumulative | Running cumulative timer per staff member |
| Staff identity | Name and role required | Name and role required | Linked to user login credential |
| Interactive communication | ≥1 real-time audio/video contact; asynchronous messages do not qualify | ≥1 real-time audio/video contact | Twilio call log with date, mode, and summary |
| Data reviewed | Device type, date range, key values, alerts | Device type, date range, key values, alerts | Auto-populated from transmission feed |
| Care plan adjustment | Description of action or rationale for no change | Description of action or rationale for no change | Structured note field with free-text |
The 99470 and 99457 codes are mutually exclusive. Practices cannot bill both for the same patient in the same month, which makes accurate cumulative time tracking essential before code selection.
The 16-day data transmission threshold for CPT 99454 is the single most common source of RPM claim denials. A data day counts only when the FDA-cleared device automatically records and transmits at least one reading on a calendar day. Multiple readings from different devices on the same day count as one day, and manual patient entries do not qualify.
| Device Supply Code | Transmission Days Required | Cardiology Example | Rhythm360 Log Output |
|---|---|---|---|
| CPT 99445 | 2–15 days | Post-discharge HF patient, 10-day weight scale monitoring after diuretic titration | Day-count report with date, reading type, and receipt timestamp per transmission |
| CPT 99454 | 16–30 days | Hypertension patient, twice-daily BP cuff with SBP >180 alert threshold | 16-day threshold alert triggers billing-ready flag and exportable audit log |
CIED patients follow a different set of rules. Cardiac remote monitoring under CPT 93294 for pacemakers and 93295 for ICDs requires a minimum 30-day monitoring period in a calendar year before billing the professional interpretation component. CPT 93297 for implantable loop recorders does not require a 30-day minimum, so billing follows each clinically indicated transmission episode. CPT 93298 covers remote interrogation of a subcutaneous cardiac rhythm monitor for up to 30 days and requires at least 10 days of monitoring within that period for reimbursement.
The workflow below moves general RPM billing back into focus after the CIED-specific codes above. Only one practitioner may bill RPM services for a given patient in any 30-day period, and charges must be reconciled with monitoring logs before submission.
Rhythm360's administrative dashboard tracks billable events in real time, flags patients approaching or meeting each CPT threshold, and generates audit-ready documentation. This helps practices capture revenue previously lost to incomplete logs. The University of Chicago Medicine, for example, implemented Rhythm360 to manage over 73,000 reports annually, with stable dismissal rates and improved billing accountability.
Explore Rhythm360's real-time CPT threshold tracking and billing documentation workflow.
RPM is billed as a care-management service, not a telehealth service, so it isn't subject to Medicare's geographic or originating-site restrictions. That distinction matters because telehealth flexibilities under the Consolidated Appropriations Act, 2026, extended through December 31, 2027, apply to a different set of services entirely. Despite this separation, RPM claims face their own scrutiny. The audit triggers below represent the most common documentation failures identified by OIG and CMS program-integrity reviews.
Internal compliance audits should run at least quarterly, reviewing a random 10 to 20% sample of patient records across consent, orders, devices, 16-day transmission, and time documentation domains.
Cardiology practices managing patients across multiple device manufacturers face a structural documentation problem. Each OEM portal produces data in a different format, on a different schedule, with no unified audit trail. The cardiac monitoring space includes platforms such as Paceart, Murj, PaceMate, Implicity, Rhythm Management Group, and Octagos. Rhythm360 resolves the format problem by ingesting and normalizing data from all major CIED manufacturers, including Medtronic, Boston Scientific, Abbott, and Biotronik, into a single HIPAA-compliant platform, achieving greater than 99.9% transmissibility through redundant data feeds, computer vision, and AI-powered extrapolation.
Rhythm360 automates the specific documentation elements that auditors examine:
As with the University of Chicago Medicine deployment mentioned earlier, practices using Rhythm360 have achieved up to a 300% increase in revenue generation through better CPT code capture and an 80% reduction in critical alert response times.
New CPT codes 99445 and 99470 create more billing opportunities and more documentation requirements at the same time. Every claim now depends on a precise, timestamped record of transmission days, management time, interactive communication, consent, and medical necessity. Incomplete documentation costs cardiology practices revenue through denials and exposes them to OIG recoupment.
Rhythm360 automates the documentation elements that CMS, AMA, and OIG require, across all major CIED manufacturers and chronic disease service lines. Every billable minute and transmission day gets captured and stays defensible.
Both codes cover device supply for remote patient monitoring but apply to different transmission day thresholds within a 30-day billing period. CPT 99445, introduced January 1, 2026, covers patients who transmit physiologic readings on 2 to 15 unique calendar days and reimburses at a national average of $52.11. CPT 99454 covers patients who transmit on 16 to 30 days and reimburses at the same rate. The two codes are mutually exclusive. Only one may be billed per patient per 30-day period. For cardiology practices, this distinction matters most for post-discharge heart failure patients on short-term weight monitoring or patients undergoing blood pressure medication titration who may not reach 16 transmission days in a given month. Rhythm360 automatically counts qualifying transmission days and flags which code applies before the billing period closes, preventing the most common RPM denial.
CPT 99457 covers the first 20 minutes of treatment management per calendar month and requires four categories of documentation. First, a cumulative time log must record the specific date, duration in minutes, staff identity, and a detailed description of activities performed for every session. Vague entries such as
