The importance of providing a clear explanation about an administrative decision is essential in the process of handling administrative affairs. This becomes all the more important when an exception arises in the application of a regulation, which raises more questions than an introduction or abolition of a system.

But the National Health Insurance Service and pharmaceutical companies have never provided an explanation on a drug that extended their drug pricing negotiation period after passing the set deadlines. This non-explanation of such events has persisted despite the increasing drug pricing negotiation extensions that are been made between the NHIS and companies to newly list or expand insurance