PET Imaging of Northern Colorado Email Security Breach

Opening Summary

PET Imaging of Northern Colorado, a diagnostic imaging facility based in Colorado, experienced a significant data breach involving unauthorized access to its email systems. The breach was reported to the Colorado Attorney General on June 27, 2025, affecting approximately 4,824 individuals. The unauthorized access to email systems likely exposed protected health information (PHI) and personal data maintained by the organization. This incident represents a hacking or IT-related security compromise rather than physical theft or loss of records, indicating that attackers gained unauthorized access to the facility's digital infrastructure.

Discovery and Response Timeline

The specific date of breach discovery was not detailed in the submission, though the June 27, 2025 submission date indicates the breach was reported to authorities within the required HIPAA notification timeframe. Upon discovery of the unauthorized email access, PET Imaging of Northern Colorado initiated an investigation to determine the scope of the compromise, identify affected individuals, and assess what information may have been accessed. The organization was required under HIPAA Breach Notification Rule to notify affected individuals without unreasonable delay and no later than 60 calendar days after discovery of the breach. The involvement of a business associate in this breach suggests that the organization works with third-party vendors for services such as billing, IT support, or other healthcare operations, and the breach may have involved systems shared with or managed by these partners.

Technical Details of the Breach

The breach occurred through unauthorized access to the organization's email systems, which typically serve as a central repository for patient communications, appointment scheduling, billing information, and clinical correspondence. Email systems are frequently targeted by threat actors because they often contain a comprehensive collection of sensitive information and may serve as a gateway to broader network access. The hacking incident likely involved one or more of the following vectors: credential compromise (stolen or weak passwords), phishing attacks targeting staff members, exploitation of unpatched email server vulnerabilities, or compromise of email accounts through social engineering. Email-based breaches are particularly concerning because they may provide attackers with access to multiple data types simultaneously, including names, dates of birth, medical record numbers, insurance information, and clinical details discussed in patient-provider communications.

Organizational Context

PET Imaging of Northern Colorado is a specialized diagnostic imaging facility offering Positron Emission Tomography (PET) scanning services. PET imaging is an advanced diagnostic tool used to detect cancer, cardiac conditions, neurological disorders, and other serious health conditions. As a diagnostic imaging center, the organization maintains detailed patient records including medical histories, imaging results, referring physician information, and insurance details. The facility serves the Northern Colorado region, providing services to patients from multiple counties and potentially drawing referrals from a broader geographic area. The involvement of a business associate indicates the organization relies on external partners for critical functions, which expands the potential attack surface and requires careful vendor management and contractual security obligations.

Patient Impact and Affected Population

Approximately 4,824 individuals were affected by this breach. These patients likely include current and former patients who had email communications with the facility, scheduled appointments, or had their information referenced in email correspondence. The affected population may span several years of patient records, as email systems typically retain historical messages and attachments. Patients affected by this breach should assume that their personal information, including names, contact information, dates of birth, medical record numbers, and potentially insurance information, may have been accessed by unauthorized parties. In some cases, clinical information discussed in email communications between patients and providers, or between providers and referring physicians, may also have been compromised. The notification process required by HIPAA would have informed affected individuals of the breach, the types of information involved, steps they should take to protect themselves, and contact information for the organization's breach response team.

HIPAA Compliance and Industry Context

Under the HIPAA Breach Notification Rule, covered entities and business associates must notify affected individuals of breaches of unsecured PHI. Email-based breaches represent a significant category of healthcare data breaches, accounting for a substantial portion of reported incidents in recent years. The involvement of a business associate in this breach highlights the importance of Business Associate Agreements (BAAs) that establish security requirements and liability for third-party vendors. Healthcare organizations are required to implement administrative, physical, and technical safeguards to protect electronic PHI, including access controls, encryption, audit logging, and regular security assessments. Email systems should be protected through multi-factor authentication, encryption of data in transit and at rest, and employee security awareness training. The fact that this breach occurred through email access suggests potential gaps in the organization's security posture, whether related to access controls, employee training, or technical defenses. Similar breaches affecting healthcare email systems have been reported across the industry, often resulting from credential compromise or phishing attacks that exploit human factors rather than purely technical vulnerabilities.