Psychotherapy practice seeks practice software

I am looking for practice software for my psychotherapy practice for children and adolescents.

The software should meet the following requirements:

• Health insurance approval for psychotherapy, suitable for the Association of Statutory Health Insurance Physicians in Lower Saxony
• Suitable for psychotherapy (depth psychology, psychoanalysis)
• Customer or patient management
• Appointment management, calendar, time tracking
• Fee schedule, codes
• Quarterly billing
• Linux-compatible
• Good service and support from the software provider

The software does not need to offer support for private patients.

One software workstation is planned.