Standards for Privacy of Individually Identifiable Health Information. Final Privacy Rule Preamble.. De-Identification of Information


In this rule, the Department allows covered entities to determine that health information is de-identified (i.e. that it is not individually identifiable health information), if certain conditions are met. Moreover, information that has been de-identified in accordance with the rule is not considered individually identifiable information and may be used or disclosed without regard to the requirements of the regulation. The covered entity may assign a code or other means of record identification to allow de-identified information to be re-identified if requirements regarding derivation and security are met.

As with other components of this rule, the approach used to remove identifiers from data can be scaled to the size of the entity. Individually identifiable health information can be de-identified in one of two ways; by either removing each of the identifiers listed in the rule or by engaging in a statistical and scientific analysis to determine that information is very unlikely to identify an individual. Small entities without the resources to conduct such an analysis t can create de-identified information by removing the full list of possible identifiers set forth in this regulation. Unless the covered entity knows that the information could still identify an individual, the requirement of this rule would be fulfilled. However, larger, more sophisticated covered entities may choose to determine independently what information needs to be removed based on sophisticated statistical and scientific analysis.

Efforts to remove identifiers from information are optional. If a covered entity can not use or disclose protected health information for a particular purpose but believes that removing identifiers is excessively burdensome, it can choose not to release the protected health information, or it can seek an authorization from individuals for the use or disclosure of protected health information including some or all of the identifiers.

Finally, as discussed in the Regulatory Impact Analysis, the Department believes that very few small entities engage in de-identification currently. Fewer small entities are expected to engage in such activity in the future because the increasing trend toward computerization of large record sets will result in de-identification being performed by relatively few firms or associations over time. We expect that a small covered entity will find it more efficient to contract with specialists in large firms to de-identify protected health information. Larger entities are more likely to have both the electronic systems and the volume of records that will make them attractive for this business.