Clinical settings run multiple systems and products from different vendors. When each holds data in its own format, exchanging information is laborious and hinders coordination.
HL7 FHIR ("fire") is an international standard for exchanging health information between systems. It draws attention as a foundation for EHR standardization and the national information-sharing service. This article explains the key points plainly.
The current state and challenges of standardization
Traditionally, EHR data was locked in each vendor's proprietary format, and moving it to other systems or linking it was not easy. This has contributed to vendor lock-in and switching costs.
As demand grows for regional collaboration and research-data use, the need for a mechanism to handle data in a common format increases. Standardization is one answer to these challenges.
Indeed, many hospitals have struggled with data migration when replacing an EHR. Standardization can also be seen as an investment that lightens the burden of switching over the long term.
The basic concept of HL7 FHIR
FHIR expresses health information — patients, prescriptions, tests — in units called "resources" and exchanges them using web technologies. Even across systems from different vendors, data can be exchanged in the same format.
Domestically, SS-MIX2, which standardizes and stores clinical data, has also been widely used. FHIR complements such existing standards and is positioned as a common language that enables more flexible coordination.
IT staff and vendors handle the technical implementation, but it is important for management to hold the view of whether their data can be exported in a standard format. Data portability is a key condition for not narrowing future options.
What it means for hospitals and where it helps
To make the most of FHIR support, it is practical to start from "what to use it for" rather than the standard itself. Standards support shows its effect in scenes like these.
None of these are matters that a single hospital completes alone; they contribute to raising the quality of care across the region. Standards support is an investment that benefits both your convenience and regional collaboration.
- Sharing and coordinating clinical information between institutions
- Easier data linkage with other systems and applications
- Secondary use of data for research and analysis
- Avoiding vendor lock-in and easing future migration
Practical checklist
When choosing an EHR, it is reassuring to verify support for standards from the following angles.
Also check the vendor's track record of actually connecting with other institutions and its stance toward standardization. Looking at operational results, not just catalog claims, helps avoid failure.
- Support status for standards such as HL7 FHIR and SS-MIX2
- Whether it can connect to the Electronic Health Record Information Sharing Service
- Ease of data export and whether the format complies with standards
- Extensibility that anticipates future coordination and secondary use
Common misconceptions and how to avoid them
The understanding that "if it supports FHIR, everything connects automatically" is not accurate. What can be linked depends on the range of supported information and the implementation profile.
There is also the misconception that "standardization is only for large hospitals." Small and mid-size hospitals in fact benefit from easier migration and coordination, so standards support matters regardless of size.
Another point to note is that standards support and actual usability are different. Even when a product complies with a standard, operability and ease of use differ by product, so standards support is a necessary but not sufficient condition.
Cautions on the sharing service, regulations, and data governance
The government's Electronic Health Record Information Sharing Service is described as using FHIR to share clinical information between institutions. Since the scope of covered documents/data and the start of operation may change, please confirm the latest details with primary sources such as the MHLW and relevant ministries.
In connection with standardization, when considering data use or generative AI, it is essential to design the handling of patient information in line with internal rules and the intent of the 3-Ministry/2-Guideline framework. Avoid entering information into external services unmanaged.
The framework around standardization and information sharing is being developed in stages, but its scope and timing may still change. It is important not to assert figures or deadlines and to make it a habit to check primary sources before deciding.
Solving it with the EHR (Sakigake Platform)
If you are choosing now, whether the design is premised on standards compliance is an important criterion. A base designed around standards support, like the cloud-native Sakigake Platform, makes it easier to prepare for future sharing and coordination.
Since standards will continue to be revised, whether the design philosophy can keep up with updates is worth assessing. Choosing a foundation that can grow with change, rather than being built once, brings long-term peace of mind.
Summary
HL7 FHIR is a common language for exchanging health information and a foundation for standardization and sharing. For hospitals it ties directly to avoiding vendor lock-in and easier coordination, making it a key point in system selection.
Standards may look like a matter only for engineers, but they are in fact a management issue that shapes a hospital's future options. When selecting a system, position standards support clearly as one of your requirements.
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