Profil_Isabel Mehlmann
Stage_TI-Messenger (1)

The TI Messenger - For Better Medical Care

Communicate Securely and Interoperably with tim+ from Arvato Systems

About tim+
Use Cases
Data Exchange

tim+: The New Messenger Service for the German Healthcare Sector

Finding a secure messenger service that meets the requirements of the GDPR and the DSK (2021) has not been easy for healthcare participants. Probably the most difficult task? - Finding a messenger service that is not only secure, but also interoperable. 

In order to close exactly this gap, healthcare experts launched the idea of a secure and interoperable messenger service for the German healthcare sector in 2019. What was initially just an idea was enshrined in law in 2021 with the Digital Supply and Care Modernization Act (DVPMG). By the end of 2023, the time has finally come: all healthcare providers in the German healthcare system will be able to use a secure and interoperable TI messenger to chat with their colleagues inside and outside their organization and exchange important patient data such as medication plans, blood or laboratory values. 

Proven Quality and Security

Users do not have to rely on the manufacturer's specifications. The TI messenger service was developed in accordance with gematik specifications and tested by certified experts for interoperability, security and data protection. The TI messenger thus bears a seal of approval, unlike any other messenger service. Anyone using a TI messenger can be sure that it is DSGVO and DSK compliant and compatible with other TI messengers. In addition to intersectoral and interoperable communication, TI messenger also paves the way to TI 2.0 and is not only more flexible than other TI applications, but can be integrated into the practice management system (PVS), used as a standalone solution and installed on the desktop or mobile phone.

tim+ Brings Relief in Everyday Work

Often, the introduction of new technologies or a new application is viewed skeptically. However, the TI messenger from Arvato Systems, tim+, is completely intuitive, just like familiar messenger services. What's more, tim+ was co-developed by doctors and nurses and therefore meets specific requirements in everyday medical practice. For this reason, tim+ has more to offer in order to be able to map medical situations quickly, easily and in a legally compliant manner.

Features of tim+


The possibilities of the matrix protocol, on which the TI messenger is based, are extensive. In addition, tim+ can be functionally extended and customized to meet the needs of the customer: 

  • Creation of (group) chat rooms and messages
  • Video and audio calls
  • Video and audio conferencing 
  • Sharing of digital content up to 100 MB (photos, videos, etc.) 
  • Document sharing up to 100 MB (Word, Excel, PDF, etc.)
  • Case-based communication 
  • Create surveys 
    Read and send confirmation
  • Broadcasting function or server notices 
  • Search function and media overview
  • Domain-based user directory
  • Central user administration 
  • User and role-based accounts 
  • Function accounts
  • and much more

Video Consultation

If required, we also offer the messenger service with an integrated video consultation. As a KBV-certified video service provider, the tim+ video consultation can be billed as normal via EBM (valuation scale) and GOÄ (fee schedule for physicians). 

Please contact us if you would like to learn more about the tim+ video consultation.

Patient Connection

If you want to fully exploit the added value of tim+, you can already use tim+  for patient communication in addition to the standard functions and video consultation, which still takes place outside the telematics infrastructure in the first version of the TI messenger.

Use Cases of tim+

  • Bild_UseCase1

    With the help of tim+, the internal communication of a hospital, nursing home, or other medical facility can be significantly improved. For example, the TI messenger simplifies communication in patient care right from the start. In the "Care - Doctor" example, nurse Antonia can inform the family doctor's office, Dr. Klingenstaedt, via chat that resident K123456789 has developed a slight skin rash overnight. To do this, she takes a picture of the rash and sends the picture to the doctor's office on the same day with a request for feedback. In this case, the TI messenger saves nurse Antonia from losing valuable time on the phone with the doctor's office, as she still has to wash and care for other residents. In addition, the case was documented and could already be filed due to the integration into the nursing system. Since Nurse Antonia's shift ends in an hour, she has marked the case and passed it on to the next shift so that they can monitor the progress and take action, if necessary, should the rash worsen or the resident worsen.

    Note: The case has been simplified.

  • Bild_UseCase2

    In addition to the usual functions that are also familiar from well-known messenger services, tim+ paid particular attention to how case-based communication between service providers, e.g., doctors and specialists, can be mapped in a user-friendly way. An example of this is cases that need to be treated and cared for over a longer period of time. Particularly in oncology, in the case of chronically ill people, or in the case of multimorbidity, it can make sense to closely monitor the course of a therapy or wound healing to intervene as early as possible. In this case, it makes sense to maintain communication via tim+ over weeks, months, or even years. tim+ is primarily used as a tool to stay in contact with the treating specialist, to clarify queries, and, if necessary, to conduct a direct video conference with the respective specialist. Patients can also be included in the chat. 
    It should be noted that tim+ is not intended as a storage medium. The relevant patient data can be transferred via tim+ without hesitation for improved communication. Still, for legal and medical reasons, storage in the respective HIS (hospital information system) or PVS is also required for legal and medical reasons. 

  • The cases describe just two of countless use cases in medical care. Thanks to the Messenger service's functions, medical specialists are given the opportunity to exchange information with healthcare facilities within and, above all, outside their organization. This also includes laboratories and health offices. As health insurers and insured persons will also officially become part of the TI messenger community in the future, automatic appointment scheduling or ordering follow-up prescriptions via smartphone or tablet is within reach. Health insurers are obliged to provide their insureds with a TI messenger. Whether via ePA or health insurance app, every insured person will have access to a TI messenger in the future.

Structured Data Exchange for Better Medical Care


In the context of Artificial Intelligence, the importance of the TI messenger in the area of structured data exchange should not be underestimated. Here, the Interoperability Council has firmly planned TIM (TI messenger) and KIM (Communication in Medicine) in order to be able to send data in a structured manner via both secure messaging services in the future. Already, tim+ enables structured data exchange via the FHIR standard. Once the data is available in structured form for service providers and insured persons, it will provide completely new insights into care and treatment processes. 

Patients also benefit considerably from structured data exchange. Especially in the area of patient monitoring, there is still a lot of potential that has not yet been fully exploited in Germany. Once the messenger service has arrived in the patient portals and thus in the living room of the insured, appointment reminders, medication intake or complaints can be documented and received in an uncomplicated manner via tim+ in the future. In particular, automated chatbots will be used to ask patients regularly and in a standardized manner how they are feeling following an operation or a change in medication. The language of the chatbot can be changed to the patient's own language. It is important that the chatbot is seen as a helpful companion and does not replace medical professionals. Use of these functions is always on a voluntary basis.

In the future, several million people will be able to benefit from the advantages and features of the TI messenger. There are no limits to the further development of functionalities. The topic of Artificial Intelligence is not neglected here, and in addition to the increasingly frequent human-to-machine communication, machine-to-machine (M2M) communication is also increasingly coming into the focus of healthcare facilities.

Your Benefits

Intersectoral, Interoperable Communication
Best Possible Protection of Patient Data through E2E Encryption 
Better Care for Patients 
Involvement of the Insured from the Beginning
Simple Operation Similar to Known Messenger Services 
Tested and Certified by gematik and Independent Experts

Technical Requirements for the Use of tim+

gematik has announced that in order to use a TI messenger, each institution or service provider organization must have a Security Module Card Type B (SMC-B). An SMC-B is a practice ID card to identify oneself for the use of the telematics infrastructure (TI). Authentication for the TI messenger takes place via OpenID connect or via an existing KIM address. Since doctors' offices and psychotherapists have been required to have TI access since 2019 and outpatient care services and facilities can already connect to the TI, the TI Messenger can already be used if you have a TI connection. The next step is to install the messenger solution in the medical facility. From there, the individual users can be created and managed. The users can decide for themselves whether and how they want to use the TI messenger. An integration of tim+ into the primary systems is just as possible as a separate use via a web or mobile client.

Frequently Asked Questions About TI Messenger

  • Is a TI messenger mandatory?

    Currently, the use of a TI messenger is not mandatory. Each medical facility can decide for itself whether or not to use a messenger service.

  • Where can I get tim+ from Arvato Systems?

    We work with a network of different service providers on-site and primary system manufacturers through which they can obtain tim+. Together with our partners, we make our TI messenger available to you, accompany you during the service setup, and assist you beyond that with a wide range of support. To ensure that tim+ can be used smoothly in your everyday life, users can obtain our TI messenger via their umbrella organization, their known local service providers (DVO), and primary system manufacturers. 

  • What does the + in tim+ stand for?

    As with our partner product, kim+, our TI messenger stands out with the excellent service you can expect from us and our partners. With the integrated video consultation and our other TI products, you receive an attractive offer from us. In addition, our TI messenger can be seamlessly integrated into your existing primary systems.

  • What is the difference between KIM and TIM?

    KIM is a communication service via which healthcare providers can send cross-sector e-mails containing documents such as eAUs (electronic certificates of incapacity for work), digital transfer sheets or findings. A prerequisite for the use of KIM is a connection to the TI through a connector on site or in the data center, whereby the use can take place exclusively in the practice, nursing home or other medical facility. The use of a KIM service is mandatory for all practices that want to send e-doctor letters or eAUs.

    TIM, on the other hand, is a messenger similar to WhatsApp - only it can be used in a legally secure manner in the healthcare sector. The messenger can be used regardless of location and device, which means it can be used flexibly for internal as well as cross-sector communication. Colleagues can easily exchange images and information on the health status of their patients - for example, a wound - or contact the doctor directly via smartphone. There is currently no obligation to use the TI Messenger.

You May Also Be Interested In

Communication in Medicine

Communication in the medical sector: Our comprehensive KIM service for clinics, MVZs, medical practices, and pharmacies from a single source.

TI Connection for Care

The TI connection enables overarching communication from all players in the medical system.

Digital identities in the healthcare industry

In the future, TI 2.0 security will be based on digital identities. They will be made available with the help of a secure IDP solution.

TIM: The Interoperable Messenger for Medical Care

To be able to communicate interoperably, securely, and, above all, by data protection guidelines via Messenger in the German healthcare system, several requirements must be met. Read this blog article to find out what these requirements are and what plan the gematik has developed.

Your Contact for den TI-Messenger

Profil_Isabel Mehlmann
Isabel Mehlmann
Expert for the TI-Messenger