Understanding the concept of Controlled Unclassified Information (CUI) is crucial, especially in the context of government and sensitive data handling. CUI encompasses a wide range of information categories and types, but it’s equally important to identify what doesn’t fall under this classification. In this article, we will explore the nature of CUI and, more importantly, provide examples of what does not qualify as CUI.

Controlled Unclassified Information (CUI): A Brief Overview

Controlled Unclassified Information (CUI) is a classification used by the U.S. government to identify and protect sensitive but unclassified information that doesn’t fall into the categories of classified national security information. CUI is subject to laws and regulations that require its safeguarding, dissemination, and protection. It is critical to ensure that CUI is handled appropriately to prevent unauthorized access or exposure.

Examples of CUI

Medical Records: Information related to an individual’s health and medical history, such as patient records, prescription information, and medical diagnoses, is often classified as CUI.

Law Enforcement Records: Criminal investigation reports, arrest records, and police reports may contain sensitive information that falls under CUI.

Taxpayer Data: Personal and financial information of taxpayers, including Social Security numbers, income details, and tax returns, is classified as CUI and protected by strict regulations.

Defense Information: Non-classified but sensitive data related to national defense, military equipment, or strategies can be designated as CUI.

Research Data: Scientific and research data, especially when it has applications in national security, is often categorized as CUI.

Homeland Security Information: Data concerning the security of the homeland, infrastructure, and critical systems is classified as CUI to ensure its protection.

What Is Not CUI?

Publicly Available Information: Information that is readily accessible to the public and does not contain sensitive or proprietary data is not classified as CUI. This includes information found in public records, open-source research, or information that is intentionally shared with the public.

Classified National Security Information: CUI is distinct from classified information, which has higher levels of protection and is covered by different security protocols. Classified information, like Top Secret or Secret, is not CUI.

Personal Opinions or Beliefs: Personal opinions, beliefs, and expressions of individuals, even if shared within a government agency or workplace, are not classified as CUI.

Non-Sensitive Administrative Data: Routine administrative data, such as office supply orders, meeting schedules, or staff directories, typically does not qualify as CUI.

Information Covered by Other Legal Protections: Some information is protected by laws separate from CUI regulations. For example, medical information covered under the Health Insurance Portability and Accountability Act (HIPAA) has its own set of protections.

Publicly Released Government Documents: Documents, reports, or publications officially released by government agencies and intended for public consumption are generally not considered CUI.


Controlled Unclassified Information (CUI) is a classification designed to protect sensitive, unclassified data from unauthorized access and dissemination. Understanding what falls under the CUI category is essential for individuals and organizations that handle such information. However, it’s equally crucial to recognize what doesn’t qualify as CUI. This includes publicly available information, personal opinions, non-sensitive administrative data, and information already covered by other legal protections.

By distinguishing between what is and isn’t CUI, organizations can implement appropriate security measures and ensure compliance with relevant regulations while safeguarding sensitive but unclassified information.