What Is FHIR? The Global Standard Behind Your International Medical Records

FHIR is the open healthcare data standard that makes your medical records readable by doctors anywhere in the world. Here's what every traveller needs to know.

Imagine arriving at a hospital in Tokyo, São Paulo, or Nairobi after a medical emergency, and not being able to tell the attending physician what medications you take, which substances you're allergic to, or what chronic conditions you manage. That scenario plays out for thousands of international travellers every year. FHIR, Fast Healthcare Interoperability Resources, is the global technical standard designed to prevent exactly that outcome.

Developed and maintained by HL7 International, a not-for-profit organisation with affiliates in over 30 countries, FHIR defines a common language for health data so that a medical record created in Manchester can be meaningfully understood by a clinician in Montreal, Manila, or Munich. For travellers, FHIR matters because it underpins the International Patient Summary (IPS), the structured health document that Nomedic uses to store and share your essential health information wherever you go.

What Is FHIR, and Why Should a Traveller Care?

FHIR, pronounced "fire", is an open standard published by HL7 International that specifies how healthcare information is structured, stored, and exchanged between software systems. Think of it as a universal grammar for health data: just as the HTML standard ensures a webpage built in Germany renders correctly on a browser in Brazil, FHIR ensures that a blood-type record, allergy list, or prescription created in one health system can be read and acted upon in another.

The standard represents the fourth generation of HL7's interoperability specifications, building on decades of earlier work (HL7 Version 2, Version 3, and Clinical Document Architecture). FHIR's key innovation is its use of modern web technologies, RESTful APIs, JSON, XML, and RDF, which makes it far easier for developers to build health apps and for health systems to share data without expensive, bespoke integration projects. According to HL7 International, FHIR standards are now widely implemented by vendors and healthcare systems and required by governing bodies around the world.

For you as a traveller, the practical implication is straightforward: when your health information is structured according to FHIR, a doctor in an emergency department anywhere in the world, provided their system supports the standard, can receive, parse, and act on your data without needing to phone your GP back home, decipher a foreign-language paper document, or guess at your medical history.

FHIR and the International Patient Summary: How They Fit Together

The International Patient Summary (IPS) is the specific document format most relevant to international travellers, and FHIR is the technical backbone that makes it work. As defined in ISO standard 27269 and implemented through HL7's IPS Implementation Guide (currently version 2.0.0), the IPS is "a minimal, non-exhaustive set of data elements required for the international patient summary", a curated snapshot of the health information a clinician needs most urgently when treating an unfamiliar patient.^[4]

The IPS is an international collaborative effort to develop a specification for a health record summary extract. It is codified in both EN 17269 (the European standard) and ISO 27269 (the international standard), and it is expressed in the FHIR ecosystem as a structured FHIR Document, a self-contained bundle of data resources that can be transmitted electronically or encoded as a QR code for offline access.

What Does an IPS Actually Contain?

According to the HL7 IPS Implementation Guide, a compliant IPS document is composed of clearly defined sections. The required sections include: your active problems and diagnoses, your current medications (including generic INN names and dosages), and your known allergies and intolerances, including the type of reaction (for example, anaphylaxis, rash, or gastrointestinal intolerance) and the causative agent. Recommended sections cover immunisation history, diagnostic results, and procedures. Optional sections may include advance directives, functional status, and social history.^[1]

This structured approach is critical for traveller safety. If you have a known allergy to penicillin, a FHIR-encoded IPS will communicate that fact in a machine-readable format that can trigger alerts in foreign hospital software, not just as a line of text that a busy clinician might miss. If you take warfarin or a disease-modifying therapy for multiple sclerosis, the INN (International Non-proprietary Name) included in your IPS ensures the drug is recognised regardless of the brand name used in the country you are visiting.

Where FHIR Is Already Being Used: A Global Picture

FHIR adoption is accelerating globally, and that is good news for anyone who travels regularly. As of the 2025 State of FHIR Survey, an annual global initiative collaboratively organised by HL7 International and Firely, the International Patient Summary serves as the basis for national FHIR specifications in 42 countries surveyed. Over 60% of respondents anticipated significant benefits from FHIR adoption within three years, including enhanced care coordination.^[6]

The European Union: MyHealth@EU

The European Union ensures continuity of care across member states through the MyHealth@EU platform, which mandates IPS-compliant data sharing between participating countries' health systems. This means that if you are a UK or EU national travelling within the European Economic Area, your patient summary, if held in an IPS-compliant format, can theoretically be accessed by treating clinicians in participating member states without you needing to carry paper records or make international phone calls.^[5]

The United States: CommonHealth and SMART Health Links

In the United States, the CommonHealth initiative collaborates with over 400 healthcare institutions to enable the sharing of patients' electronic health records via QR codes, while Washington State's Wa Verify+ utilises the SMART Health Links framework, built on FHIR, to integrate governmental and private-sector medical records into an IPS-compliant format. These initiatives illustrate how FHIR is moving from policy documents into practical, patient-facing tools.^[2]

The United Kingdom: NHS Single Patient Record

In the United Kingdom, NHS England announced the Single Patient Record (SPR) programme in 2024 and is currently in a 'test and learn' phase; under the 2025 10 Year Health Plan, patient access via the NHS App is targeted for 2028. The existing Summary Care Record (SCR) continues to provide essential medical information to clinicians in the meantime. The NHS's FHIR-based infrastructure forms the digital backbone of this programme, positioning the UK as one of the more advanced national adopters of structured health data standards.

South Korea, Australia, and Beyond

South Korea provides FHIR data through its "My Health Record" application, utilising an implementation guide that inherits from KR Core FHIR profiles. Researchers in Korea are actively developing pipelines to transform domestic FHIR resources into fully IPS-compliant data, illustrating the global momentum toward a single interoperability standard. Countries around the world are undertaking various initiatives to leverage the IPS to enhance the integration and accessibility of health information, confirming that FHIR is not a niche Western standard but a genuinely global infrastructure.^[8]

FHIR Versions: What R4 and R5 Mean for You

FHIR has gone through several major releases, referred to as "versions" or "releases", each labelled with an "R" number. The version most widely deployed in production systems today is FHIR R4, published in 2019, which established the normative core of the standard. FHIR R5 was published in 2023, introducing refinements to subscriptions, bulk data access, and support for clinical reasoning resources. The IPS Implementation Guide version 2.0.0, the current published version from HL7 International, is based on FHIR 4.0.1 (R4), ensuring broad compatibility with existing health systems globally.^[1]

What does this mean in practice? If your health app, including Nomedic, generates an IPS document using FHIR R4 resources, it will be compatible with the vast majority of health systems worldwide that have implemented FHIR support. You do not need to understand the technical version numbers; what matters is that your IPS is structured according to a recognised standard, carries internationally understood terminology codes (such as SNOMED CT for diagnoses and LOINC for test results), and is accessible when you need it.

Why FHIR Matters More Than a Scanned PDF

Many travellers believe that carrying a scanned PDF of their medical records, or even a printed letter from their GP, is sufficient preparation for a health emergency abroad. In non-urgent situations, that may be adequate. In an emergency, it is rarely enough. A PDF is an image of text: it cannot be automatically imported into a hospital's electronic health record system, cannot trigger drug-interaction alerts, and cannot be translated reliably by clinical staff who may not speak your language.

A FHIR-encoded IPS, by contrast, is machine-readable structured data. It uses internationally standardised terminology, including SNOMED CT codes for diagnoses, INN drug names for medications, and LOINC codes for laboratory results, meaning that the clinical meaning of your data does not depend on translation. An allergy coded as SNOMED CT concept 372687004 (amoxicillin) is unambiguous whether the clinician's interface is in English, Japanese, Italian, or Arabic.^[1]

Consider a traveller with relapsing-remitting multiple sclerosis who requires a disease-modifying therapy such as natalizumab (brand name: Tysabri) or ocrelizumab (brand name: Ocrevus). A paper letter naming only the brand name may be meaningless in a country where those brands are marketed differently or not at all. An IPS containing the INN, the dosage, the administration route, and the relevant SNOMED CT diagnosis code for MS (24700007) leaves no room for misinterpretation, even across language barriers.

How FHIR Protects You When Health Systems Don't Communicate

Even within a single country, health systems rarely communicate seamlessly with one another. Across international borders, where different languages, legal frameworks, and electronic health record platforms are in play, the gaps are far wider. The IPS was designed specifically for this challenge: its initial focus was unplanned care across national borders, the exact situation a traveller faces in a medical emergency.^[3]

The goal of the IPS, as stated by HL7 International, is to create a common foundation for patient summary exchange across borders and ensure the ability to share key information with caregivers whenever and wherever needed. FHIR makes that goal technically achievable. The IPS Implementation Guide specifies precisely which data elements are required, which are recommended, and which are optional, reducing ambiguity and ensuring that any IPS-compliant document carries the minimum viable information a clinician needs to treat you safely.

FHIR and Patient Empowerment: Your Right to Your Own Data

One of the most significant aspects of the FHIR ecosystem for travellers is the International Patient Access (IPA) standard, which sits alongside the IPS. According to HL7 International, the IPA standard aims to enable regulators, empower patients, guide app developers, and promises greater consistency across countries for multinational apps and FHIR servers. For patients, greater access to health data empowers them to standardly and computably access and retain their digital health data.

In practical terms, this means that in countries where FHIR-based patient access APIs are mandated, such as the United States under the 21st Century Cures Act, or within the EU's European Health Data Space regulation, you have a legal right to request your health data in a structured, machine-readable FHIR format. Apps like Nomedic can then receive that data directly, structure it as an IPS, and make it available to emergency clinicians abroad via a secure QR code or digital link, no fax machines, no international phone calls, no guesswork.^[2]

Limitations of FHIR: What It Cannot Do (Yet)

It is important to be realistic about the current state of FHIR adoption. Despite rapid progress, not every hospital in every country has implemented FHIR-compatible systems. In many parts of the world, including parts of South-East Asia, sub-Saharan Africa, and Latin America, electronic health records remain patchy or paper-based, and the technical infrastructure needed to receive a FHIR document may not yet exist in emergency departments.

This does not make FHIR-structured data useless in those settings. Even where clinical systems cannot ingest a FHIR bundle automatically, a well-designed app can render your IPS as a human-readable summary, in the local language, if translations are available, that a clinician can read on any smartphone or computer screen. The structured data is the gold standard; the human-readable rendering is the safety net. Nomedic provides both.

Additionally, an IPS is a snapshot of your health at the time it was created. It must be kept up to date. If you start a new medication, are diagnosed with a new condition, or receive a new vaccination after your IPS was generated, that information will not appear in the document unless you update it. Building a habit of reviewing and refreshing your IPS before every significant trip is one of the most important steps you can take.

How to Create Your FHIR-Compliant IPS with Nomedic

Nomedic generates your IPS in full compliance with the HL7 FHIR IPS Implementation Guide. The process is straightforward: you input your health information, or import it from a connected health system where FHIR patient access APIs are available, and Nomedic structures it into a valid FHIR R4 document. Your IPS is then accessible via a secure QR code and a shareable digital link that works on any device, anywhere in the world, even without an internet connection once cached.^[1]

Before your next trip, take 15 minutes to review your Nomedic IPS: confirm that your medications list includes current dosages and INNs, that all known allergies are recorded with reaction types, and that any recent diagnoses or procedures are included. If you are travelling with a complex condition, such as multiple sclerosis, diabetes, or a cardiac condition, consider supplementing your IPS with a condition-specific travel note prepared with your specialist. Your IPS is the foundation; condition-specific guidance builds on top of it.

Checklist

Create or update your IPS on Nomedic before every international trip — aim to review it at least two weeks before departure.
Ensure all medications are listed by their INN (International Non-proprietary Name) as well as the brand name, including dosage and route of administration.
Record every known allergy with the specific causative agent and the type of reaction (e.g. anaphylaxis, urticaria, gastrointestinal intolerance).
Include your current diagnoses using their full clinical names — for example, 'relapsing-remitting multiple sclerosis' rather than just 'MS' — so clinicians unfamiliar with abbreviations can act promptly.
Download or cache your IPS QR code offline so it is accessible without an internet connection if you lose mobile data abroad.
Share your Nomedic IPS link with a trusted travel companion or emergency contact so they can present it on your behalf if you are incapacitated.
After any change in medication, new diagnosis, or vaccination, log into Nomedic and update your IPS before your next journey.
If travelling within the EU, confirm whether your country participates in MyHealth@EU for cross-border record sharing, and carry your Nomedic IPS as a backup regardless.

Common mistakes

Assuming a scanned PDF or printed letter is equivalent to a structured health record

A PDF cannot be automatically ingested by foreign hospital systems, cannot trigger drug-interaction or allergy alerts, and cannot be reliably translated. A FHIR-encoded IPS is machine-readable structured data that clinical systems can process instantly — the difference in an emergency could be critical.

Listing medications by brand name only, without the INN

Brand names vary dramatically between countries — the same active ingredient may be sold under a completely different name, or the brand may not be marketed at all. Using the International Non-proprietary Name (INN) ensures the drug is recognised universally, regardless of where you are treated.

Creating an IPS once and never updating it

An IPS is a point-in-time snapshot. If you start a new medication, receive a new diagnosis, or get vaccinated after your document was generated, that information will be absent. Clinicians acting on an out-of-date IPS may make decisions based on incomplete information — particularly risky with conditions that evolve rapidly.

Believing FHIR means every hospital abroad can automatically access your records

FHIR defines how data should be structured and shared, but adoption varies widely between countries and even between hospitals within the same country. Always carry your IPS as a QR code or shareable link that can be shown on a smartphone — do not rely on automatic system-to-system data transfer being available.

Omitting allergies because they seem minor

What feels like a mild allergy at home — such as a rash from a sulfonamide antibiotic — could guide a clinician away from an entire drug class in an emergency. Even intolerances that are not life-threatening should be recorded with the type of reaction, as they inform prescribing decisions.

Sources

HL7 International — International Patient Summary Implementation Guide v2.0.0 — https://www.hl7.org/fhir/uv/ips/
HL7 International — Official FHIR Standard Homepage — https://www.hl7.org/fhir/
HL7 Blog — International Patient Summary: Key Standard for Global Interoperability — https://blog.hl7.org/topic/international-patient-summary
ISO 27269 — Health Informatics: The International Patient Summary — https://www.iso.org/standard/79491.html
European Commission — MyHealth@EU Cross-Border Health Data — https://health.ec.europa.eu/ehealth-digital-health-and-care/electronic-cross-border-health-services_en
HL7 / Firely — 2025 State of FHIR Survey — https://www.hl7.org/fhir/
HAPI FHIR — International Patient Summary Documentation — https://hapifhir.io/hapi-fhir/docs/server_jpa/ips.html
Scientific Reports — Development of a FHIR-based Korean IPS Data Pipeline (2025) — https://www.nature.com/articles/s41598-025-33390-z

Frequently asked questions

What does FHIR stand for, and who maintains it?

FHIR stands for Fast Healthcare Interoperability Resources. It is developed and maintained by HL7 International, a not-for-profit standards organisation with affiliates in over 30 countries. FHIR is an open standard that defines how health data is structured and exchanged between software systems, using modern web technologies such as RESTful APIs and JSON.

What is the difference between FHIR and the International Patient Summary (IPS)?

FHIR is the underlying technical standard — the framework that defines how health data resources are structured and transmitted. The International Patient Summary (IPS) is a specific document format built on top of FHIR: it specifies exactly which health data elements (medications, allergies, diagnoses, and so on) should be included in a cross-border patient summary. Think of FHIR as the grammar and the IPS as the specific document type written in that grammar.

Is my FHIR-based IPS useful in countries that haven't fully adopted FHIR?

Yes. Even where hospital systems cannot automatically import a FHIR bundle, a well-designed app like Nomedic can render your IPS as a human-readable summary on any smartphone screen. The structured FHIR data is the technical gold standard; the human-readable rendering ensures clinicians in any setting can still access your key health information quickly.

Which version of FHIR does the International Patient Summary use?

The current published IPS Implementation Guide from HL7 International (version 2.0.0) is based on FHIR R4 (version 4.0.1). This is the most widely deployed version in production health systems globally, ensuring maximum compatibility. FHIR R5 was published in 2023 and introduces further refinements, but R4 remains the dominant version for IPS implementations.

How do I get my health data into a FHIR-compliant IPS format?

The simplest route is to use Nomedic, which guides you through entering your health information and structures it as a valid FHIR R4 IPS document. In countries where FHIR patient access APIs are available — such as the United States under the 21st Century Cures Act or within EU member states — you can also import existing records directly. Once created, your IPS is accessible via a QR code or secure digital link that works on any device.

Does carrying a FHIR IPS mean my data is automatically shared with foreign hospitals?

No — your IPS is not automatically sent anywhere. It remains under your control and is shared only when you choose to present the QR code or link to a healthcare provider. This is an important privacy protection: you decide when and with whom your health information is shared, even in an emergency where you may hand your phone to a clinician to scan.