Embodiments described herein provide systems and methods to streamline the mechanism by which data users access differently regulated data through the use of one or more integrated identifiers. The integrated identifiers lessen or eliminate the need to separately maintain one set of identifiers for regulated data and another set for non-regulated data. The methods and systems may be applicable in various credit and healthcare contexts where regulations over data use are prevalent. In one or more embodiments, a data user receives a unique integrated identifier for each of the data user's current or prospective customers, and the integrated identifiers can be used to persistently identify and track the customers over time and across applications that access regulated and/or non-regulated data. In the healthcare context, a healthcare provider may utilize a patient ID as the integrated identifier. To protect privacy, the integrated identifier may not include social security numbers or birthdates.