Helsinki University Hospital (HUS) sought clarity on how the EHDS Regulation will impact patient information systems
The European Health Data Space (EHDS) is set to transform the use of patient data by creating a unified framework for the use and exchange of health information. Helsinki University Hospital HUS is preparing for this new era with a precise situational overview that will help ensure the success of the system projects required by the reform.
“We reviewed more than 80 different information systems, of which around 40 were examined in detail — the ones containing patient data relevant to the regulation,” says Jari Kähkölä, Chief IT Architect at HUS IT Management.
These figures summarise the joint project between HUS and NHG, which assessed the impact of the EHDS and eIDAS regulations on HUS’s information systems. HUS is the biggest healthcare provider in Finland and it is responsible for organizing specialized healthcare for 2,2 million people, and in some rare cases even for all of the Finnish population (5,7 million). It is the second largest employer in the country with 27,000 employees.
The regulations will fundamentally change how patient data is handled across the European Union. The aim is that all healthcare units operating within the EU will have access to patient information in accordance with the regulation. This represents a major transformation in the information systems that support patient care.

The numbers also show that the project was far from small — and it is intended to guide HUS’s decision-making. The EHDS entered into force in 2025, with general application beginning in March 2027. The final functionalities will not be implemented until 2035.
HUS recognised early on that such extensive regulatory changes would have a significant impact on its operations. The risk of the overall programme running into difficulties decreases substantially when sufficient time is allocated.
“We realised the scale of the change when we understood that the regulation defines the patient information system much more broadly than we had previously assumed. Its obligations apply to all digital client data that has been stored — not only the information in our core patient information system,” Kähkölä explains.
”We fully woke up to the scale of the change when we realized that the regulation defines the patient information system far more broadly than we had previously assumed.”
Jari Kähkölä, Chief IT Architect, HUS
An essential overview
Without a clear situational picture, it is practically impossible to determine how dozens of information systems should evolve. While system owners know their own environments well, understanding the implications of EU legislation is challenging. This is where NHG’s expertise proved invaluable.
“NHG provided us with a clear model and classification of the EHDS requirements. After that, it was straightforward for us to review the data content of each system and assess how the regulation affects them”, says Jari Kähkölä.
Equally important was the ability to present HUS leadership with a concise and coherent overview of the regulatory framework. This enables management to allocate resources correctly and avoid unnecessary costs.
“The consultants clearly had in‑depth knowledge of the EHDS Regulation that we did not yet have. They significantly accelerated the creation of the situational overview, its interpretation, and the planning work built on top of it,” says Into Laine, System Manager from HUS.
How HUS implements the EHDS requirements in its own operations may also influence practices elsewhere in Finnish healthcare and even abroad.
“HUS is an exceptionally large and advanced organisation even by European standards. That’s why it is crucial that it takes the EHDS seriously and prepares early. HUS’s operating model may shape how the regulation is applied more broadly,” says Mikko Huovila, Principal Consultant at NHG.
”HUS’s operating model may influence how the regulation is applied more broadly.”
Mikko Huovila, Principal Consultant, Nordic Healthcare Group
Project highlights

Challenge
Building a shared understanding of how the EHDS Regulation affects HUS’s information systems, how to prepare for it, and what resources the overall programme will require

Solution
A sustained series of workshops. Classification of EHDS requirements and applying that classification across systems and data content.

Results
A clear view of the current state and the resources required for implementation. Preparation for the numerous IT projects mandated by the regulation becomes significantly easier.
Impact assessment needed in your orgnization? Get in touch!