Category: Physical and Technical Safeguards

Person or Entity Authentication

Also known as: Entity Authentication, Authentication (Security Rule)

Simply put

Person or Entity Authentication is a HIPAA Security Rule requirement that a healthcare organization confirm that a person or system trying to access electronic protected health information (ePHI) really is who or what it claims to be. In practice this means verifying identity before granting access, for example through passwords, tokens, or other verification methods. The goal is to prevent unauthorized users or systems from reaching sensitive electronic health data.

Formal definition

Person or Entity Authentication is a technical safeguard standard under the HIPAA Security Rule requiring covered entities and business associates to implement procedures to verify that a person or entity seeking access to ePHI is the one claimed (generally cited at 45 CFR 164.312(d); readers should confirm the citation against the current regulatory text). Consistent with NIST usage, authentication is the process of proving the claimed identity of an entity, where an entity may be a human user or a non-person entity such as a service account, machine, or software component. As a Security Rule technical safeguard, this standard applies only to ePHI and does not govern PHI in oral or paper form, which falls under the Privacy Rule. Unlike some other Security Rule standards, this standard is stated as a single requirement rather than being broken into required and addressable implementation specifications; however, organizations generally retain flexibility in selecting authentication mechanisms (for example, single- or multi-factor methods) based on their risk analysis. This entry addresses only the HIPAA obligation; the HITECH Act, state law, or frameworks such as the HITRUST CSF may impose additional or more specific authentication controls, and adopting any particular mechanism does not by itself guarantee overall HIPAA compliance.

Why it matters

Person or Entity Authentication is one of the foundational technical safeguards under the HIPAA Security Rule because it is the control that stands between electronic protected health information (ePHI) and anyone, or anything, trying to reach it. Access controls, audit logging, and encryption all depend on the system being able to reliably answer a basic question first: is this person or entity actually who or what it claims to be? Without dependable authentication, other safeguards lose much of their meaning, because an attacker or unauthorized user operating under a legitimate identity can move through systems as though they belong there.

The requirement matters not only for human users but also for non-person entities such as service accounts, machines, and software components that access ePHI in automated workflows. These automated identities are easy to overlook, yet they often hold broad access and persist long after the humans who created them have moved on. Weak or shared credentials, unverified service accounts, and unmanaged machine identities are common weak points that can undermine an otherwise well-designed security program.

It is important to keep this standard in perspective. Authentication verifies identity; it does not by itself define what a verified user is permitted to do, nor does it govern PHI in oral or paper form, which falls under the Privacy Rule. Adopting a strong authentication mechanism reduces risk but does not guarantee overall HIPAA compliance, and it does not prevent all breaches. Organizations should treat authentication as one component of a broader, risk-based security program rather than a standalone solution.

Who it's relevant to

Security Officers and IT Teams

Those responsible for implementing the HIPAA Security Rule must design and maintain authentication procedures for all systems that create, receive, maintain, or transmit ePHI. Their choices, password policies, token-based methods, or multi-factor authentication, should be driven by the organization's risk analysis and should account for non-person entities such as service accounts and machine identities, not just human users.

Compliance and Privacy Officers

These professionals need to understand where authentication fits within the technical safeguards and where its scope ends. Because this standard applies only to ePHI, compliance staff should coordinate with those managing the Privacy Rule to ensure PHI in oral or paper form is addressed under the appropriate requirements. They should also confirm the applicable regulatory citation against the current text rather than relying on any single reference.

Business Associates and Their Subcontractors

Business associates and their subcontractors that access ePHI are directly subject to the Security Rule's technical safeguards, including authentication, and their related obligations typically flow through business associate agreements. They should verify that both human and automated access to ePHI is authenticated in a manner consistent with their own risk analysis.

Auditors and Assessors

Those evaluating an organization's security posture examine whether authentication procedures are documented, implemented, and appropriate to the assessed risk. Assessors working with frameworks such as the HITRUST CSF should note that such frameworks may specify additional or more granular authentication controls, and that certification against them does not by itself establish HIPAA compliance.

Inside Person or Entity Authentication

Technical Safeguard Standard

Person or Entity Authentication is a technical safeguard standard under the HIPAA Security Rule, which applies specifically to electronic protected health information (ePHI). It does not extend to PHI in oral or paper form, which falls under the Privacy Rule.

Core Requirement

The standard generally requires covered entities and business associates to implement procedures to verify that a person or entity seeking access to ePHI is the one claimed. Verification of identity before granting access is the central objective.

Authentication Factors

Authentication is typically established through one or more factors: something a user knows (such as a password or PIN), something a user has (such as a token or smart card), or something a user is (such as a biometric characteristic). The Security Rule does not mandate a specific method, allowing entities to select approaches appropriate to their risk analysis.

Relationship to Access Control

Person or Entity Authentication is distinct from but works alongside the Access Control standard. Authentication confirms identity, while access control governs what an authenticated identity is permitted to do. Both are technical safeguards but address different functions.

Applicability to Regulated Parties

This standard applies to covered entities and to business associates and their subcontractors, with obligations flowing through business associate agreements. It does not directly regulate every vendor that touches data absent such a defined relationship.

Common questions

Answers to the questions practitioners most commonly ask about Person or Entity Authentication.

Is Person or Entity Authentication an addressable specification that we can skip if it's inconvenient?

No. Person or Entity Authentication is a required implementation specification under the Security Rule's technical safeguards, not an addressable one. Because it is required, covered entities and business associates must implement procedures to verify that a person or entity seeking access to ePHI is the one claimed. Note that even for addressable specifications, addressable does not mean optional; it means an organization may implement an alternative or document why a specification is not reasonable and appropriate. Readers should confirm the current regulatory text, as implementation specification classifications should be verified against the applicable Security Rule provisions.

Does implementing multi-factor authentication mean we are automatically compliant with this standard?

Not by itself. Person or Entity Authentication requires that you verify identity before granting access to ePHI, but the Security Rule does not mandate a specific technology such as multi-factor authentication. Deploying MFA can support this requirement, but compliance also depends on how authentication fits within your broader administrative, physical, and technical safeguards and your risk analysis. No single control guarantees compliance or prevents all unauthorized access. This standard also applies only to ePHI under the Security Rule; PHI in oral or paper form falls under the Privacy Rule and is out of scope here.

What methods can be used to satisfy the authentication requirement?

The Security Rule is generally technology-neutral and does not prescribe a specific method, so organizations may select approaches appropriate to their risk analysis. Commonly used methods include passwords or PINs (something you know), tokens, smart cards, or keys (something you have), and biometrics (something you are). Many organizations combine factors. The appropriate method should be determined based on your risk assessment and the sensitivity of the ePHI involved; readers should confirm requirements against the current Security Rule text and any applicable HHS guidance.

How does authentication apply to system-to-system or application access, not just individual users?

The standard refers to a person or entity, which can include automated systems, applications, or services that access ePHI, not only human users. In practice, organizations typically authenticate machine or service accounts using credentials, certificates, or API keys as appropriate to the environment. As with user authentication, the specific approach should follow from your risk analysis. Verify implementation expectations against current regulatory guidance, as the rule describes the objective rather than prescribing specific mechanisms.

How does Person or Entity Authentication relate to Access Control and Audit Controls?

These are distinct technical safeguard standards that work together. Authentication generally establishes who or what is requesting access, Access Control limits what an authenticated identity is permitted to do with ePHI, and Audit Controls record activity so it can be reviewed. Authentication typically precedes access control decisions and provides the identity that audit logs attribute actions to. Treating them together supports a layered approach, though each has its own requirements under the Security Rule that should be addressed individually.

Do business associates have to meet this authentication requirement, and how is that documented?

Yes. Business associates are directly subject to the Security Rule's technical safeguards, including Person or Entity Authentication, for ePHI they create, receive, maintain, or transmit. These obligations are also typically reflected in the business associate agreement between the parties. Note that a HITRUST CSF certification, if pursued, may map to authentication controls but does not by itself establish HIPAA compliance. Organizations should confirm their specific obligations against the applicable BAA, the current Security Rule text, and any additional requirements under state law or the HITECH Act.

Common misconceptions

Person or Entity Authentication requires multi-factor authentication for all ePHI access.

The Security Rule generally does not prescribe a specific authentication method or mandate multi-factor authentication. Entities determine appropriate mechanisms based on their risk analysis, though other frameworks, state law, or evolving guidance may recommend or require stronger measures. Readers should verify current regulatory expectations.

This standard covers verifying identity for all forms of protected health information.

Person or Entity Authentication is a Security Rule technical safeguard that applies only to ePHI. Identity and disclosure verification for PHI in oral or paper form is addressed under the Privacy Rule, not this standard.

Achieving HITRUST CSF controls related to authentication establishes HIPAA compliance with this standard.

HITRUST is a private organization and its CSF is a certifiable control framework, not a legal requirement. Meeting HITRUST authentication controls may support compliance efforts but does not by itself establish compliance with the HIPAA Security Rule, which is enforced by HHS OCR.

Best practices

Conduct and document a risk analysis to determine appropriate authentication mechanisms for ePHI, since the Security Rule permits flexibility in method selection.

Verify identity before granting access to ePHI and align authentication procedures with the Access Control standard so that confirmed identities receive only appropriate permissions.

Consider stronger authentication measures, such as multiple factors, where the risk analysis or applicable state law, the HITECH Act, or other frameworks suggest heightened protection may be warranted.

Extend authentication expectations to business associates and subcontractors through business associate agreements, ensuring obligations flow to parties handling ePHI on your behalf.

Maintain written policies and procedures documenting your authentication approach, and periodically review them against the current Security Rule text and evolving guidance.

Avoid treating HITRUST certification or any single authentication technology as proof of HIPAA compliance; confirm requirements against current HHS OCR guidance and verify any specific figures or citations against the applicable regulation.