From the HHS.gov website: The Privacy Rule permits certain incidental uses and disclosures that occur as a by-product of another permissible or required use or

From the HHS.gov website: The Privacy Rule permits certain incidental uses and disclosures that occur as a by-product of another permissible or required use or disclosure, as long as the covered entity has applied reasonable safeguards and implemented the minimum necessary standard, where applicable, with respect to the primary use or disclosure. See 45 CFR 164.502(a)(1)(iii). An incidental use or disclosure is a secondary use or disclosure that cannot reasonably be prevented, is limited in nature, and that occurs as a result of another use or disclosure that is permitted by the Rule. However, an incidental use or disclosure is not permitted if it is a by-product of an underlying use or disclosure which violates the Privacy Rule.