Last updated: February 24, 2026
FHIR evolved from HL7 v2 and v3 standards to support modern web-based APIs that use RESTful architecture with JSON and XML formats. FHIR R4, released in 2019, is the current production standard mandated by the 21st Century Cures Act for patient data access. FHIR R5, published in 2023, adds subscription improvements that support real-time notifications.
FHIR relies on several core concepts that make data sharing practical for cardiology teams.
More than 4 in 5 hospitals support patient access to their information via apps, and 70% enable HL7 FHIR-based app access. This “universal translator” model breaks down OEM data silos that burden cardiology practices managing multiple device manufacturers.
FHIR resources are standardized data structures that represent healthcare information in a consistent, machine-readable way. The table below highlights key resources for cardiology and RPM workflows.
| Resource | Description | Cardiology Application | Example |
|---|---|---|---|
| Patient | Demographics and identifiers | Links CIED data to an individual | Patient with multiple devices |
| Device | Medical equipment details | Pacemakers, ICDs, monitors | Medtronic pacemaker for CPT 93298 |
| Observation | Clinical measurements | BP, weight, heart rate, arrhythmias | AFib episode detection |
| Encounter | Patient care interactions | Cardiology visits, procedures | EP consultation for device check |
The Device resource represents equipment such as portable telemetry monitors, Holter monitors, weight scales, and blood pressure devices used in cardiology. A nurse who reviews a tachycardia alarm from a portable telemetry monitor can pull standardized device data through FHIR APIs instead of logging into multiple portals.
The following API call illustrates this approach: GET /Patient?identifier=CIED-123 retrieves patient data linked to specific cardiac devices. Cardiology departments use FHIR for procedure documentation, automated 30-day follow-ups, and registry submissions. These workflows bridge data silos and support more reliable RPM billing and outcomes tracking.
Cardiology teams can roll out FHIR for RPM by following a clear, staged implementation plan.
1. Assess EHR capabilities. Review Epic, Cerner, or other EHR systems for HL7 and FHIR support. Identify integration points where device data should flow into existing workflows.
2. Map OEM data sources. Catalog data formats from each device manufacturer, including API, XML, and PDF outputs. Define normalization rules so teams can view data in a single, consistent structure.
3. Implement OAuth security. Configure secure authentication protocols for FHIR API access. Maintain HIPAA compliance and protect patient privacy while still enabling real-time data exchange.
4. Deploy Bulk FHIR. Use bulk data export capabilities to support population health management and analytics across large device populations.
Cardiology RPM programs gain additional value from R5 topic-based subscriptions for real-time notifications. These subscriptions support immediate alerts for AFib episodes, device malfunctions, or missed transmissions. RESTful APIs then handle GET requests for data retrieval and POST operations for creating new observations.
Common real-world use cases include unifying multiple OEM portals into a single dashboard and automating EHR data pushes for smoother clinical workflows. Rhythm360 uses vendor-neutral data ingestion through API, HL7, XML, and PDF parsing to remove manual portal management. This approach saves hours of administrative time each week and supports comprehensive data capture. Schedule a demo to see Rhythm360 implementation in a live environment.
FHIR delivers measurable advantages for cardiology practices that manage complex RPM programs.
Challenges still exist. FHIR implementation can be complex and often requires technical expertise, careful planning, and staff training. Many organizations also struggle with data mapping and consistent data quality across sources. Platforms such as Rhythm360 reduce these barriers by offering turnkey solutions, guided onboarding, and automated data normalization.
Current adoption statistics show strong momentum across the industry. Government organization adoption rose from 29% to more than 40%, and the share reporting improved data access increased from 70% to over 75%. FHIR-compatible platforms reduce claim denials by 95% and administrative overhead by 50%. These results demonstrate clear ROI for cardiology practices that manage large device populations and complex billing rules.
Rhythm360 delivers a vendor-neutral cloud platform that ingests more than 99.9% of CIED data from all major OEMs using API, HL7, XML, and PDF parsing with computer vision. The platform’s AI-powered triage system cuts alert response times by about 80%, which helps teams focus on the highest-risk patients first. Bi-directional EHR integration keeps clinical workflows consistent, so staff do not need to learn multiple portals.
Rhythm360 also covers both CIED and HF/HTN monitoring in a single environment, which sets it apart from competitors such as PaceMate and Implicity. This unified approach supports revenue growth of up to 300% through automated CPT code capture and more accurate billing workflows. Schedule a demo today to see how unified cardiology data management works in practice.
New ONC certification criteria for EHRs will become mandatory Base EHR capabilities by January 1, 2028. At the same time, CMS will require FHIR-based APIs for payers by January 2026. These policies push the entire ecosystem toward standardized, API-driven data exchange.
FHIR R5 subscription improvements support real-time alert systems that are critical for cardiology RPM. Weekend AFib detection can prevent strokes and avoid costly admissions, which creates clear clinical and financial ROI. Clinics that invest in FHIR-based RPM today will be better aligned with upcoming regulations and payer expectations.
FHIR resources are standardized data structures that represent discrete healthcare information elements such as patients, devices, observations, and encounters. In cardiology, key resources include Device for CIEDs and monitors, Observation for vital signs and arrhythmias, and Patient for demographics that link all cardiac data together.
FHIR implementation can be complex and often requires technical expertise along with upfront investment in staff training and system integration. Some organizations struggle with data mapping and with maintaining consistent data quality across different sources. Platforms such as Rhythm360 reduce these barriers through turnkey solutions, comprehensive support, and automated data normalization.
FHIR supports RPM by standardizing data exchange between medical devices, EHR systems, and monitoring platforms. It enables real-time transmission of vital signs, device readings, and clinical observations while maintaining security and interoperability. Cardiology practices use FHIR to unify data from multiple device manufacturers and to automate clinical workflows that improve patient outcomes.
As of 2025, more than 80% of hospitals have implemented FHIR capabilities, and 71% use FHIR in active operational workflows. This growth reflects regulatory mandates and the clear operational benefits of standardized data exchange for both clinicians and administrators.
FHIR is the latest standard developed by HL7 International and is designed for modern web-based applications that use RESTful APIs. Traditional HL7 v2 and v3 standards rely on more complex messaging formats that can be harder to implement and maintain. FHIR uses simpler JSON and XML structures, which makes it well suited for mobile apps and cloud-based platforms such as Rhythm360.
