Interoperability in Healthcare: What It Is and Key Challenges in 2026

Interoperability in healthcare is the ability of different health information systems, devices, and applications to access, exchange, and use patient data in a coordinated way. 

When systems are interoperable, a lab result generated at one facility is immediately available to the prescribing physician at another. When there’s a lack of interoperability in healthcare, clinical staff spend hours on phone calls, faxes, and manual data re-entry to piece together a patient's complete health picture.

Despite decades of investment in electronic health records, most healthcare organizations still struggle with fragmented data across disconnected systems. The result is duplicated tests, delayed treatments, billing errors, and preventable patient safety incidents. 

This guide covers what interoperability means in healthcare, the four levels of data interoperability, the standards that enable it, the interoperability in healthcare challenges blocking it, and the best practices for achieving it.

Interoperability in Healthcare: TL;DR

• Interoperability is the ability of healthcare systems to exchange and use patient data seamlessly across organizations, departments, and software platforms.
• There are four levels of interoperability solutions in healthcare: foundational (basic transport), structural (standardized format), semantic (shared meaning), and organizational (governance and policy alignment).
• Key standards include HL7 v2, FHIR, C-CDA, and TEFCA. FHIR is rapidly becoming the industry default for modern healthcare data exchange.
• The biggest barriers are inconsistent data standards, legacy system incompatibility, vendor lock-in, regulatory complexity, and organizational resistance.
• No-code integration platforms like Keragon help healthcare organizations bridge interoperability gaps by connecting 300+ healthcare tools with HIPAA-compliant, automated data exchange.

What Is Interoperability in Healthcare?

The healthcare interoperability definition is straightforward: the ability of two or more health information systems to exchange data and use it meaningfully. 

This goes beyond simply sending a file from one system to another. True interoperability means the receiving system can interpret, display, and act on the data without human translation or manual re-entry.

To define interoperability in healthcare more precisely, it means that a patient's medical history, lab results, medications, allergies, imaging, and insurance information can flow between EHRs, practice management systems, billing platforms, pharmacies, labs, and public health registries without losing meaning or context.

Health information interoperability operates at the intersection of technology (APIs, data standards), policy (regulations such as the 21st Century Cures Act), and organizational alignment (governance, workflows, and agreements between trading partners). All three must be in place for interoperability to work in practice.

The distinction between interoperability and integration matters. EHR integration connects specific systems within a single organization (e.g., connecting your EHR to your billing software). Interoperability is the broader goal: seamless data exchange across organizations, regions, and the entire healthcare ecosystem. Integration is a building block of interoperability.

Why Is Interoperability Important in Healthcare?

The importance of interoperability in healthcare is measured in patient outcomes, operational efficiency, and financial performance. 

When healthcare data interoperability works, the entire care delivery chain improves. When it fails, the costs are both human and financial.

Here are the main benefits of interoperability in healthcare:

Better Patient Care and Safety

Clinicians making treatment decisions need access to a patient's complete medical history, not just the subset stored in their own EHR. 

Without interoperability in healthcare information systems, a physician may prescribe a medication that interacts with a drug prescribed by another provider, or order a test that was already performed at another facility. 

Interoperable systems eliminate these blind spots by making the full patient record available at the point of care.

Reduced Administrative Burden and Costs

A significant portion of U.S. healthcare spending goes to administrative tasks that interoperability could automate or eliminate: re-entering patient demographics, chasing down records via fax, manually reconciling medication lists, and resubmitting claims with corrected data. 

According to a JAMA study (2019), administrative complexity accounts for an estimated $265.6 billion in annual waste across the U.S. healthcare system.

Faster, More Coordinated Care Transitions

When a patient is discharged from a hospital, their primary care physician, specialists, pharmacy, and home health agency all need timely access to the discharge summary, medication changes, and follow-up instructions. 

Without interoperability, this information is delayed or lost, leading to readmissions, medication errors, and gaps in follow-up care.

Advancing Research and Population Health

Interoperable data enables large-scale research, public health surveillance, and population health management. 

When clinical data from multiple organizations can be aggregated and analyzed, researchers can identify disease patterns, evaluate treatment effectiveness, and respond to public health emergencies faster.

Regulatory Compliance

Federal regulations are increasingly mandating interoperability. 

The 21st Century Cures Act prohibits information blocking and requires certified health IT to support standardized APIs. The Trusted Exchange Framework and Common Agreement (TEFCA) is building a national infrastructure for health data exchange. 

Organizations that fail to meet these requirements face regulatory penalties and reputational risk.

Reduced Healthcare Costs

Duplicated tests, redundant imaging, manual data reconciliation, and claim rework all cost money. 

Interoperable systems reduce these costs by ensuring information flows automatically between systems.

For example, when a lab result is available in real-time to the ordering physician, the specialist, and the billing system simultaneously, the savings compound across every encounter.

Interoperability in Healthcare Examples

Practical examples of interoperability in healthcare illustrate how data exchange works across different care settings and workflows:

EHR Data Sharing Between Providers

A patient sees a specialist who needs access to their primary care records. 

With interoperable systems, the specialist's EHR queries the primary care provider's system and retrieves the relevant medical history, medications, and lab results automatically. 

Without it, the patient carries a printed summary, or the office sends a fax.

Lab Results Delivered Directly to the EHR

When a lab completes blood work, the results are transmitted electronically to the ordering provider's EHR using HL7 or FHIR messaging. The results appear in the patient's chart within minutes, triggering any applicable clinical decision support alerts. 

Integration platforms like Keragon can extend this further by automatically notifying the patient, updating the billing system, and triggering follow-up workflows based on the results.

Hospital-to-Pharmacy Prescription Transfer

Electronic prescribing (e-prescribing) is one of the most widely adopted examples of interoperability. 

When a physician writes a prescription in the EHR, it is transmitted directly to the patient's pharmacy through the Surescripts network, eliminating handwritten prescriptions and reducing medication errors.

Care Transition Documentation

When a patient is discharged from a hospital, a Continuity of Care Document (CCD) containing their diagnoses, medications, allergies, and follow-up instructions is transmitted to their primary care provider's EHR. 

This is typically formatted using the C-CDA standard.

Public Health Reporting

Healthcare facilities report certain conditions (infectious diseases, immunizations, cancer diagnoses) to public health registries. 

Interoperable systems automate this reporting, transmitting structured data directly from the EHR to state and federal agencies.

Interoperability in Nursing

In nursing, interoperability enables bedside devices (vital sign monitors, infusion pumps, point-of-care testing equipment) to transmit data directly into the patient's EHR. This eliminates manual charting of vitals, reduces transcription errors, and gives nurses more time for direct patient care. 

Nurses at a skilled nursing facility receiving a patient from a hospital benefit from interoperable systems that provide the complete care plan, medication list, and wound care documentation without manual transfer.

Four Levels of Data Interoperability in Healthcare

Healthcare data interoperability is categorized into four levels, each building on the previous one. Understanding these levels helps organizations assess where they are and what they need to achieve.

Most healthcare organizations in 2026 have achieved foundational and structural interoperability for at least some workflows. 

Semantic and organizational interoperability remain the primary obstacles to true, seamless data exchange.

Healthcare Interoperability Standards

Interoperability standards in healthcare provide the shared language and technical specifications that enable different systems to exchange data. 

These are the most important standards in 2026:

HL7 v2

HL7 (Health Level Seven) version 2 is the most widely deployed healthcare messaging standard in the world. It defines message formats for common healthcare transactions: patient admissions, lab results, orders, scheduling, and billing. 

Despite being decades old, HL7 v2 remains the backbone of most hospital system integrations.

FHIR (Fast Healthcare Interoperability Resources)

FHIR is the modern, API-based standard developed by HL7 International. It uses RESTful APIs and JSON/XML data formats to enable web-based health data exchange. 

FHIR is designed to be easier to implement than older standards and is the foundation for the API requirements in the 21st Century Cures Act. FHIR is rapidly becoming the default standard for new healthcare interoperability initiatives.

C-CDA (Consolidated Clinical Document Architecture)

C-CDA is a document-based standard for exchanging clinical summaries between healthcare organizations. It defines the structure and content of documents like Continuity of Care Documents (CCDs), discharge summaries, and referral notes. 

C-CDA documents are the primary format used for health information exchange today.

TEFCA (Trusted Exchange Framework and Common Agreement)

TEFCA is a national framework established by the Office of the National Coordinator for Health IT (ONC) to enable nationwide health data exchange. It provides a common set of rules and technical requirements that health information networks must follow to participate. 

As of early 2026, TEFCA has facilitated the exchange of nearly 500 million health records across participating networks, marking a significant milestone in national interoperability.

Top Healthcare Interoperability Challenges in 2026

Despite regulatory pressure and technological progress, the challenges of interoperability in healthcare remain significant. 

These are the primary barriers to interoperability in healthcare that organizations face:

1. Inconsistent Data Standards and Quality

Even when organizations adopt the same standard (e.g., HL7 v2), they often customize their implementations differently. Field mappings, code sets, and terminology vary between organizations. A "primary diagnosis" in one system may map to a different field in another. 

This lack of consistent implementation is one of the most persistent problems with interoperability in healthcare.

2. Legacy System Incompatibility

Many healthcare organizations still run legacy systems that predate modern interoperability standards. These systems use proprietary data formats, lack APIs, and cannot participate in FHIR-based exchange without significant middleware investment. 

Replacing them is expensive and risky; connecting them requires specialized integration platforms.

3. Vendor Lock-In and Information Blocking

Some EHR vendors have historically restricted data sharing to maintain market position, a practice now being addressed by the 21st Century Cures Act's information blocking provisions. 

Despite the regulation, practical barriers remain: limited API access, premium integration fees, and complex data use agreements that slow down interoperability initiatives.

4. Data Privacy and Security Concerns

Every data exchange point is a potential security vulnerability. Healthcare organizations must balance the goal of data sharing with the requirements of HIPAA, state privacy laws, and patient consent preferences. 

This is particularly complex in cross-organizational data exchange, where multiple BAAs, security assessments, and governance agreements are required. 

For more on compliance requirements, see our guide to HIPAA-compliant workflow automation software.

5. Regulatory Complexity

Healthcare interoperability is governed by a patchwork of federal and state regulations, each with different requirements. The 21st Century Cures Act, HIPAA, state health information exchange laws, and emerging TEFCA participation requirements create a complex compliance landscape. 

Smaller organizations often lack the legal and technical resources to navigate this effectively.

6. Organizational Resistance and Misalignment

Interoperability requires cooperation between organizations that may be competitors. Sharing patient data with a rival health system, even when clinically beneficial, can meet resistance from leadership focused on patient retention. 

Internal organizational challenges also play a role: lack of executive sponsorship, siloed IT and clinical departments, and insufficient change management.

How to Achieve Interoperability in Healthcare: 7 Best Practices

How to improve interoperability in healthcare is not purely a technology question. It requires strategy, governance, and practical execution. 

Here are the best practices that organizations successfully achieving interoperability follow:

1. Assess Your Current State

Before building an interoperability strategy, inventory your current systems, data flows, and integration gaps. 

Map which systems exchange data today, which ones do not, and where manual workarounds (faxes, phone calls, spreadsheets) are filling the gaps. 

This assessment defines the scope of the problem.

2. Develop a Strategic Roadmap

An EHR integration strategy that prioritizes interoperability should start with the highest-impact workflows and expand outward. 

Identify the care transitions, referral pathways, and data exchanges that create the most friction for clinicians and staff. Prioritize these for automation first.

3. Adopt FHIR and HL7 Standards

For any new integration or data exchange, default to FHIR where possible. For legacy systems that only support HL7 v2, use middleware that can translate between standards. 

Standardization is the foundation of scalable interoperability.

4. Use HIPAA-Compliant Integration Platforms

Manual point-to-point integrations do not scale. 

No-code integration platforms designed for healthcare provide the middleware layer that connects systems while enforcing HIPAA compliance. 

Keragon connects 300+ healthcare tools, including EHRs like Athenahealth, DrChrono, Elation Health, Healthie, and ModMed, with built-in HIPAA and SOC 2 Type II compliance. 

Explore pre-built workflow templates for common healthcare automation patterns.

5. Establish Data Governance

Define who owns patient data, who can access it, how it is mapped between systems, and how data quality is monitored. 

Without governance, interoperability projects stall or produce unreliable results. Assign clear accountability for data quality across the organization.

6. Test, Validate, and Monitor

Test every data exchange in a staging environment before going live. Validate that data arrives intact, is mapped correctly, and triggers the expected downstream actions. 

After deployment, monitor integration health continuously with alerts for failed transfers and data quality issues.

7. Participate in Regional and National Networks

Join a health information exchange (HIE) or TEFCA Qualified Health Information Network (QHIN) to participate in broader interoperability networks. 

These networks provide the governance, trust frameworks, and technical infrastructure for cross-organizational data exchange.

The Future of Healthcare and Clinical Data Interoperability

Several forces are shaping the future of clinical data interoperability:

TEFCA expansion. As more organizations join TEFCA-designated networks, the volume of nationally exchangeable health data will grow significantly. TEFCA is on track to become the backbone of U.S. health data exchange, reducing the need for point-to-point data sharing agreements.

AI-powered data normalization. Machine learning is increasingly being used to map and normalize data between systems that use different standards, terminologies, and formats. This reduces the manual configuration that has historically made interoperability projects slow and expensive.

Patient-centered interoperability. Emerging frameworks are shifting focus from institution-to-institution exchange to patient-centered models where individuals control access to their own data across providers. FHIR-based patient access APIs are a step in this direction.

No-code automation is closing the gap. Integration platforms like Keragon are enabling healthcare organizations of all sizes to participate in interoperable workflows without custom engineering, lowering the barrier that has historically limited interoperability to large health systems with dedicated IT teams.

Key Takeaways

In this guide, we’ve looked at the interoperability in healthcare benefits, challenges, and resolutions. We know that interoperability in healthcare is no longer a technical aspiration. It’s a regulatory requirement, a financial imperative, and increasingly, a competitive differentiator. 

Organizations that achieve interoperable data exchange reduce administrative waste, improve patient outcomes, and position themselves for compliance with TEFCA and the 21st Century Cures Act.

The path forward is practical: assess your current systems, prioritize the highest-friction workflows, adopt FHIR and HL7 standards, and use HIPAA-compliant integration infrastructure to bridge the gaps. 

For healthcare organizations ready to start, Keragon's pre-built workflow templates provide a starting point, and a free 14-day trial lets you test integrations with your actual systems. For more on connecting your internal systems, see our guide to EHR integration.

Frequently Asked Questions

What does interoperability mean in healthcare?

Interoperability in healthcare means the ability of different health information systems, devices, and applications to access, exchange, and cooperatively use patient data. 

It enables a patient's medical history, lab results, medications, and other clinical information to flow seamlessly between providers, hospitals, pharmacies, labs, and insurers without manual re-entry or loss of meaning.

What sorts of patient data can be exchanged via interoperable healthcare systems?

Interoperable systems can exchange a wide range of patient data, including demographics, medical history, diagnoses, medications, allergies, lab results, imaging reports, immunization records, insurance information, clinical notes, discharge summaries, referral documents, and care plans. 

The specific data available depends on the interoperability standards in use and the systems involved.

What is FHIR, and why does it matter for interoperability?

FHIR (Fast Healthcare Interoperability Resources) is a modern, API-based standard for exchanging healthcare data. Developed by HL7 International, it uses RESTful APIs and structured data formats (JSON/XML) to enable web-based health data exchange. 

FHIR matters because it serves as the foundation for the API requirements in the 21st Century Cures Act and is rapidly becoming the default standard for new healthcare interoperability initiatives.

How does interoperability affect patient care?

Interoperability directly improves patient care by giving clinicians access to complete, real-time patient information at the point of care. 

This reduces medication errors from incomplete records, eliminates redundant testing, accelerates diagnosis and treatment, improves care transitions between providers, and enables better chronic disease management through comprehensive data sharing.

What is TEFCA, and how does it support interoperability?

TEFCA (Trusted Exchange Framework and Common Agreement) is a national framework established by the ONC to enable nationwide health data exchange. It provides common rules and technical requirements for health information networks. 

As of early 2026, TEFCA has facilitated the exchange of nearly 500 million health records across participating networks, creating the foundation for a national interoperability infrastructure.

How is healthcare interoperability regulated?

Healthcare interoperability is primarily regulated by the 21st Century Cures Act, which prohibits information blocking and requires certified health IT to support standardized APIs. 

HIPAA governs the privacy and security of health data exchange. ONC oversees health IT certification standards. 

State laws add additional requirements in some jurisdictions. TEFCA provides a voluntary national framework for cross-organizational exchange.

What is the difference between integration and interoperability in healthcare?

Integration connects specific systems within a single organization (e.g., connecting your EHR to your billing software). Interoperability is the broader goal of seamless data exchange across different organizations, systems, and standards. 

Integration is a building block of interoperability. You achieve interoperability by first integrating your internal systems, then connecting to external networks and standards such as FHIR and TEFCA.

How can healthcare organizations improve interoperability?

Start by assessing your current data flows and identifying the highest-friction exchange points. Adopt FHIR standards for new integrations. Use HIPAA-compliant integration platforms like Keragon to connect systems without custom engineering. Establish data governance policies. Participate in HIEs or TEFCA-designated networks. Test and monitor all data exchanges continuously.

What is an example of interoperability in nursing?

In nursing, interoperability enables bedside devices like vital sign monitors, infusion pumps, and point-of-care testing equipment to transmit data directly into the patient's electronic health record. This eliminates manual charting of vitals, reduces transcription errors, and frees nurses to spend more time on direct patient care. 

Nurses at skilled nursing facilities also benefit from interoperable systems that provide complete care plans, medication lists, and wound care documentation when receiving patients from hospitals.