Picus Labs | 2 MIN READ

CREATED ON August 13, 2025

What is Protected Health Information (PHI) ?

PHI (Protected Health Information) refers to any individually identifiable health information that is created, stored, transmitted, or received in any form—whether on paper, spoken, or digital. It is protected under the HIPAA Privacy Rule and includes health data such as medical records, patient history, billing information, and other health-related data that can be linked to a specific individual.

While ePHI (Electronic Protected Health Information) focuses on the digital version of this data, PHI includes all forms, and its protection spans across both digital and non-digital formats.

Examples of PHI:

Common examples of PHI include:

  • Lab results on paper records or EHRs

  • A patient’s insurance form submitted verbally or via encrypted email

  • Diagnoses and prescriptions documented in paper charts or digital systems

  • Billing information in paper form or cloud-based systems

  • Scheduling data in paper records or digital platforms

Each of these types of data, when tied to an individual, qualifies as PHI. Whether handled in digital, paper, or spoken form, they are subject to HIPAA's Privacy and Security Rules.

PHI vs. ePHI: What’s the Difference?

PHI (Protected Health Information)

ePHI (Electronic PHI)

Can exist in paper, verbal, or digital form

Exists only in electronic form

Covered by the HIPAA Privacy Rule

Covered by both Privacy and Security Rules

Requires physical and administrative safeguards

Requires physical, administrative, and technical safeguards

The key distinction is that ePHI requires additional technical safeguards—like encryption, access management, and audit logging—while PHI, regardless of its form, is primarily subject to privacy rules.

Why PHI Matters for HIPAA Compliance

PHI, regardless of whether it's in digital, paper, or verbal form, must be secured to prevent unauthorized access and disclosure. HIPAA-covered entities are legally required to protect the confidentiality, integrity, and availability of PHI, both digitally and physically. Non-compliance can lead to regulatory penalties, reputational damage, and breach notifications.

How to Protect PHI

To properly protect PHI and comply with HIPAA, organizations must implement a multi-layered defense strategy that includes:

  • Role-based access control

  • Secure data transmission and encrypted storage

  • Regular risk and vulnerability assessments

  • Audit logging and activity monitoring

  • Continuous testing of security control effectiveness

Although PHI in paper form needs protection, ePHI’s additional risks and technical requirements mean that healthcare organizations must prioritize safeguarding digital PHI against evolving cyber threats.

Need to validate your HIPAA safeguards?
Picus Security helps healthcare organizations continuously test and validate the effectiveness of security controls that protect PHI, ensuring HIPAA compliance

Frequently Asked Questions (FAQs)

Here are the most asked questions about External Attack Surface Management (EASM)

What is the difference between attack surface management and external attack surface management?

Attack Surface Management (ASM) includes both internal and external assets, while External Attack Surface Management (EASM) focuses only on internet-facing exposures, what attackers can see and probe without internal access. EASM is a subset of the broader ASM discipline.

What Is the Difference Between EASM and Vulnerability Management?

External Attack Surface Management (EASM) discovers exposed assets visible to the public internet, while Vulnerability Management identifies known flaws within those assets. EASM answers “what’s out there,” whereas Vulnerability Management answers “what’s wrong with what we already know.”

What are the main challenges in managing an external attack surface?

The main challenges in managing an external attack surface include keeping up with constantly changing cloud and internet-facing assets, accurately attributing unknown domains or IPs to the organization, detecting shadow IT, and prioritizing exposures without internal context, often leading to alert fatigue and missed high-risk issues.

How does an external attack surface management solution help?

An External Attack Surface Management (EASM) solution helps by continuously discovering and monitoring internet-facing assets, like domains, ports, APIs, and cloud services, that attackers can target. It automates asset identification, highlights misconfigurations, and reduces blind spots, giving security teams visibility into exposures they might not even know exist.

What Types of Assets Can I Monitor with an EASM Product?

With an EASM product, you can monitor a wide range of internet-facing assets including domains, subdomains, IP addresses, open ports, APIs, cloud storage (like S3 buckets), SSL/TLS certificates, exposed databases, login portals, shadow IT, third-party SaaS tools, and misconfigured services tied to your organization’s digital footprint.

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