It is mandatory to apply for an authorisation to practice medicine.

The following documents are needed to applyfor authorisation from doctors with education from EU/EEA:
Under the Professional Qualifications Directive (Directive 2005/36/EC of the European Parliament) there is a system of automatic recognition of profession qualification for medical practitioner:
- Diploma
- Transcript / Diploma Supplement
- Authorization from the country the applicant graduated from, or from another EU /EEA country if acquired.
- Work certificate (optional)

The time required to process your application is usually:
Applicants educated within EU/EEA: 4 months    

Name: The Norwegian Directorate of Health     
Type of organisation (professional, government, etc.) Trade union and professional organisation: Government 
Address: Universitetsgata 2, 0164 Oslo, Norway     
Phone number: 81020050       
Website (s): https://helsedirektoratet.no

When starting a internship (LIS-1) you are required to have:
A Norwegian authorization to practice medicine, or LIS1 licence
Sufficient language knowledge for proper professional practice
When completed LIS-1, you can directly apply for a training position in the field you wish to specialize in. Training to become a specialist requires a minimum of five years training – more in some specialties.