Dr Mark Griffiths, who has been researching the concept of video gaming disorder for 30 years, said the new classification would help legitimise the problem and strengthen treatment strategies.
This week, the World Health Organization - arguably the leading source for designating what things are bad for us - announced that "gaming disorder" will be included in the latest edition of their bible, the International Classification of Diseases.
The experts' paper ('A Weak Scientific Basis for Gaming Disorder: Let us err on the side of caution') will appear in the Journal of Behavioral Addictions.
The ICD-11 is still under review, so its content may shift.
The symptoms of gaming disorder are quite similar to those seen in substance use and gambling disorders.
Simply playing a lot of video games does not automatically mean that someone has a problem.
And yet, that hasn't spotted the larger game industry from coming forward to criticize the diagnosis.
It also includes new chapters, one on traditional medicine: although millions of people use traditional medicine worldwide, it has never been classified in this system.
The new catalogue, which still needs to be approved by United Nations member countries, so-called "gender incongruence" is now listed under "conditions related to sexual health", instead of "mental, behavioural and neurodevelopmental disorders".
"Gender incongruence... has also been moved out of mental disorders in the ICD, into sexual health conditions", reads the WHO's release on ICD-11, available on their website.
The World Health Organization says gaming disorder is a disease characterized by impaired control over gaming, with increasing priority given to gaming over other activities to the extent that gaming takes precedence over other interests and daily activities.
Diagnosis, however, has to be done by health professionals, and requires negative gaming behavior to last for at least 12 months.
In South Korea and the U.S., clinics have sprung up to treat video game addiction, along with community and online support groups. The statement is highly critical, citing contested and inconclusive data and concerns of misdiagnosis.
If you suspect that your child has a gaming disorder, it's important to seek help for it.
The classification is set out in the organisation's reference work of recognised and diagnosable diseases, the International Classification of Diseases (ICD).
"It enables us to understand so much about what makes people get sick and die, and to take action to prevent suffering and save lives", WHO Director-General Tedros Adhanom Ghebreyesus said in a statement as the ICD was published.