Portability Principles: Ensuring You Own Your EHR Data
The healthcare industry is generating approximately 30% of the world’s total data, according to RBC Capital Markets. This data typically includes clinical datasets, operational data, and financial data, which are used on a daily basis.
However, when it comes to the ownership of this data, it can be a little too complicated to explain, despite the fact that you’re the one generating this data. You see, your system doesn’t give you the freedom to move, access, or reuse this data when you require it, and requires permission from the vendor.
In fact, adopting technological trends like integrating AI or new applications can be difficult. This is one of the core reasons why the healthcare industry is steadily progressing towards interoperability. You see, as of today, around 70% of US hospitals use standards-based APIs like FHIR to provide patients with electronic access to their health information.
This marked a shift towards open data exchange. However, adopting the right technology won’t solve your portability challenges. Nearly 42% of hospitals still report experiencing information blocking, making it harder to exchange or retrieve healthcare data when needed.
To achieve true interoperability, or in this case, EHR data portability, many practices are willing to build their own EHR that goes beyond meeting interoperability requirements. It basically requires designing a system around open standards, vendor-neutral architectures, and data governance principles that ensure your system retains long-term portability, why they matter, and how healthcare organizations can ensure they always own their EHR data.
On that note, let’s explore the portability principles that will ensure you own your EHR data.
What is EHR Data Portability?
In simple terms, EHR data portability means the ability to move, access, and reuse healthcare data across different systems without losing its structure, context, or usability. This is one of the best ways to ensure that you are in control of your data, irrespective of what EHR platform you use.
One of the biggest misconceptions regarding EHR data portability is that many practices confuse exporting a report with that data being portable. On the contrary, a PDF or spreadsheet only allows you to access or view this information and not preserve the correlations between patient records, medications, diagnoses, encounters, workflows, or other clinical data.
That is why you need to understand that true data portability relies on standardized formats such as FHIR and HL7. This allows your healthcare systems to exchange structured, machine-readable information instead of static documents.
This gives your practice the flexibility to adopt new technologies, integrate third-party applications, or transition between EHR platforms without losing access to the most valuable asset, which is their data.
How Do You Make EHR Data Portable?
You make EHR data portable by storing and exporting it in standardized, machine-readable formats that even compliant healthcare systems outside your network can understand and reuse the data.
Also, let me break the truth to you early: you see, true portability isn’t determined by whether your EHR vendor can download your data. In fact, it is determined by how your data is stored and exported.
For instance, if your system supports industry standards such as FHIR, HL7, and structured APIs, your clinical data can be exchanged, integrated, and migrated without losing its meaning or relationship. Compared to this, proprietary formats, static PDFs, or incomplete exports make switching systems and integrating new technologies significantly more difficult.
Long story short, EHR data portability is built into the architecture of your system. This way, the more your EHR relies on open standards and standardized export formats, the easier it becomes for you to retain long-term control of your healthcare data.
So, here is a table to help you understand the export formats that make EHR data portable:
| Export Format / Standard | What It Exports | When to Use It |
| FHIR Bulk Data ($export) | Population-level datasets in NDJSON format | Migrating an entire patient population or powering analytics and data warehouses |
| FHIR REST API | Individual FHIR resources on demand | Real-time record access, third-party integrations, and application development |
| C-CDA (Consolidated Clinical Document Architecture) | Structured clinical summaries for individual patients | Care transitions, referrals, and patient-requested medical record copies |
| HL7 v2 (ADT, ORU, etc.) | Event-driven messages for admissions, discharges, transfers, and clinical results | Integrating with legacy healthcare systems and existing interfaces |
| USCDI Data Classes | The federally defined minimum dataset for interoperable exchange | Verifying that an export contains all required standardized clinical elements |
| CSV / Flat File Export | Raw tabular data from custom fields or proprietary databases | Exporting non-standard or custom data that has no structured healthcare equivalent |
Core Principles of Portable Health Records
When you migrate to a new EHR system, you don’t get portable health records; you have to build them, and it typically starts with system design. So, by establishing healthcare data portability as your core requirement during the development phase, you can ensure that the data remains accessible, reusable, and independent of any single platform.
On that note, here are some of the core principles of portable health records:
- Define Export Requirements Before Development Begins: Healthcare data portability should be part of the system requirement, not something that can be added or touched later. So, before you begin with the development process, choose which data must be exportable, the formats it should support—FHIR, HL7, or C-CDA—and whether exports will include clinical records, audit logs, attachments, custom fields, and workflow configurations.
- Standardize Data Formats & Clinical Code Sets: One of the best practices for EHR data portability is consistency. That is why many practices emphasize using standardized formats and clinical terminologies like FHIR, HL7, ICD-10, SNOMED CT, LOINC, and RxNorm, which helps you ensure healthcare data can be accurately interpreted across different systems without additional mapping.
- Ensure Exported Data is Immediately Usable: The exported data is only valuable if another healthcare system can import it into their system to use it without extensive manual efforts. On top of that, the portable health records should also preserve patient relationships, encounters, medications, observations, documents, and metadata so continuity of care is maintained even during migration or integrations.
- Build on Standardized Data Models: As your practice evolves, your healthcare system also evolves, but that doesn’t mean that the data should remain portable. Design applications around standardized data models rather than proprietary database structures, which help maintain compatibility even as schemas, features, and technologies change.
- Design for Long-Term Accessibility: Healthcare data is crucial for practices and patients. That is why it often needs to be retained for years. That is why portable health records should remain readable, searchable, and reusable regardless of future software upgrades, vendor changes, or infrastructure modernization to ensure that your practices always have access to the historical clinical information.
Common Challenges to EHR Data Portability
While most healthcare practices have prioritized portability as one of their top priorities, they still find it difficult to move data between systems. Differences in data structures, proprietary implementations, and consistent standards can make migrations and integrations more complex.
On that note, here are some of the most common challenges that you’re likely to encounter while moving healthcare data:
| Challenge | Why It Makes Data Hard to Move |
| Unstructured Clinical Notes & Attachments | PDFs, scanned documents, and medical images lack structured data, making them difficult for another EHR to interpret or reuse. |
| Custom Fields Without Standard Mapping | Practice-specific fields and workflows often don’t have an equivalent in FHIR, HL7, or other standards, requiring manual mapping. |
| Non-Standard Clinical Codes | Proprietary or local codes instead of LOINC, SNOMED CT, or ICD-10 reduce interoperability and require additional translation. |
| Data Model Drift | Changes to database structures across EHR versions can create compatibility issues during exports and migrations. |
| Large Attachments & Medical Images | High volumes of documents and diagnostic images increase export time and may exceed the capabilities of existing migration tools. |
Export Requirements Under Healthcare Regulations
Healthcare data portability is not just a technical best practice, but it is also supported by regulatory requirements. Modern healthcare systems are expected to provide patients and healthcare organizations with reliable access to electronic health information in standardized formats.
Here are some regulations that you must adhere to:
- ONC EHI Export Requirements: The Office of the National Coordinator for Health Information Technology (ONC) requires certified health IT to support the export of Electronic Health Information (EHI). This ensures organizations can retrieve their data in a structured format when migrating systems, responding to legal requests, or maintaining business continuity.
- USCDI Defines the Minimum Data Set: The United States Core Data for Interoperability, also known as the USCDI, has established the minimum set of clinical information that must be included in interoperable data exchanges. This compliant export would include patient demographics, medications, allergies, laboratory results, clinical notes, and other essential health information.
- Patients Have the Right to Access Their Data: Since the data we collect is of the patients that we treat, they should have the right to access their own data. That is why practices must support patient-directed access to electronic health information. This basically translates to patients being able to request and receive their records in electronic formats, which can be shared with other providers.
- Export Capabilities Must Be Continuously Maintained: Meeting regulatory requirements isn’t a one-time effort. You see, as EHR systems evolve through new releases, integrations, and database changes, the export functionality must also be regularly tested and updated to ensure data remains complete, accurate, and compatible with current interoperability standards.
Evaluating Your EHR Data Portability Readiness
Most practices know that their EHR system supports data exports. However, just knowing is not enough; as a practice, you need to ensure true healthcare data portability. For this, you have to regularly evaluate whether your system can produce complete, accurate, and reusable data when it is needed the most.
Here is a table that lets you understand the area of evaluation and what you need to verify under each one:
| Evaluation Area | What to Verify |
| Export Standards | Does your EHR support exports in FHIR, HL7, C-CDA, or other industry-standard formats? |
| Structured Clinical Data | Are patient demographics, encounters, medications, allergies, diagnoses, laboratory results, and procedures included? |
| Clinical Notes & Attachments | Are physician notes, PDFs, scanned documents, and medical images exported alongside structured data? |
| Custom Data & Workflows | Can custom fields, templates, forms, and workflows be exported without losing information? |
| Audit History | Are audit logs, user activity, timestamps, and historical records included where required? |
| End-to-End Validation | Have you tested importing the exported data into another system to verify completeness and usability? |
| Post-Upgrade Testing | Is export functionality validated after every major platform upgrade or schema change? |
| Patient Data Access | Can patients receive their electronic health information in interoperable formats when requested? |
This evaluation is something you have to sit down with your vendor and check. For self-assessment of your system, ask yourself these yes-or-no questions:
| Question | Yes / No |
| Can your EHR export data in FHIR, HL7, or C-CDA formats? | ☐ Yes ☐ No |
| Are structured clinical records included? | ☐ Yes ☐ No |
| Are attachments and scanned documents exported? | ☐ Yes ☐ No |
| Are custom fields preserved? | ☐ Yes ☐ No |
| Have you tested importing the export into another EHR? | ☐ Yes ☐ No |
| Is export functionality tested after upgrades? | ☐ Yes ☐ No |
NOTE: If the answer to any of these questions is NO, then take the hint and realize that your practice may face unnecessary challenges when integrating new technologies, changing EHR platforms, or responding to future interoperability requirements.
Conclusion
If you have made it this far, then I can be assured that you have a brief idea about EHR data portability. Along with this, you would also realize that EHR data portability is more than just moving information from one system to another. In fact, it is more about ensuring your practice always retains control over your data.
This can be done by adopting open standards, using standardized data models and well-defined export capabilities that reduce vendor dependency, simplify future integrations, and help you stay prepared for evolving regulatory and technological requirements.
So, whether you’re building a new EHR or modernizing your existing EHR platform, portability should be treated as a foundational design principle, because the more portable your healthcare data is today, the easier it will be to innovate, scale and adapt tomorrow.
On that note, get your system assessed for healthcare data portability by our EHR expert and know how to build an EHR system that is portable-ready.
Frequently Asked Questions
EHR data portability is the ability to securely move, access, and reuse healthcare data across different EHR systems without losing its structure, meaning, or usability. It allows healthcare organizations to migrate platforms, integrate third-party applications, and maintain long-term control over their clinical, operational, and financial data.
Healthcare data portability helps organizations avoid vendor lock-in, simplify EHR migrations, support interoperability, and integrate new technologies such as AI, telehealth, and remote patient monitoring. It also ensures healthcare organizations can retain ownership and accessibility of their data regardless of the EHR platform they use.
To understand how to ensure data portability in EHR systems, organizations should adopt industry standards such as FHIR and HL7, use standardized clinical code sets like LOINC, SNOMED CT, and ICD-10, define export requirements during development, validate exports regularly, and avoid relying on proprietary data formats.
Portable health records are electronic health records that can be securely exported, transferred, and reused across different healthcare systems without requiring extensive manual conversion. They preserve clinical context, patient relationships, and structured data, allowing organizations to maintain continuity of care while changing systems or integrating new technologies.
Common healthcare data export formats include FHIR Bulk Data ($export), FHIR REST APIs, HL7 v2 messages, C-CDA documents, USCDI-compliant exports, and CSV files for custom datasets. The appropriate format depends on whether the goal is patient record sharing, system integration, analytics, or full EHR migration.
FHIR Bulk Data export enables healthcare organizations to export large volumes of patient information in NDJSON format using the FHIR export operation. It is designed for population-level data exchange, analytics, research, and large-scale EHR migrations, allowing systems to retrieve standardized healthcare data efficiently.
A complete EHR data export should include patient demographics, encounters, diagnoses, medications, allergies, laboratory results, clinical notes, imaging references, billing information, audit logs, attachments, and relevant metadata. Comprehensive exports ensure the receiving system can reconstruct patient records with minimal manual effort.
Some of the best practices for EHR data portability include designing systems around open interoperability standards, using standardized clinical terminologies, supporting multiple export formats, validating exported data through end-to-end testing, maintaining export capabilities after system upgrades, and building FHIR-based portable health records that remain usable across different healthcare platforms.
In the United States, ONC Health IT Certification requires certified EHR systems to support Electronic Health Information (EHI) export capabilities. Additionally, the United States Core Data for Interoperability (USCDI) defines the minimum clinical data elements that should be included in interoperable data exchanges, helping improve healthcare data portability and patient access.
