Information System Activity Review

The HIPAA Information System Activity Review requirement means you must implement procedures to regularly review system activity records (audit logs, access reports, and incident tracking) and be able to prove those reviews happened and led to action when needed (45 CFR Parts 160, 162, 164). Operationalize it by defining log sources, review cadence, alert thresholds, escalation paths, and retaining reviewer evidence tied to tickets and incident response.

Key takeaways:

• Define “what gets reviewed” (systems, log types, and events) before debating tools or cadence.
• Auditors look for repeatable reviews plus evidence of follow-up, not just “logs exist.”
• Treat third-party systems that handle ePHI as in-scope log sources you must review or obtain review evidence for (45 CFR Parts 160, 162, 164).

Information System Activity Review is one of the most practical HIPAA Security Rule requirements because it directly tests whether you can detect inappropriate access, misuse, or security incidents in systems that store or process ePHI. The text is short, but the operational scope is wide: EHR platforms, identity systems, endpoint and server logs, cloud control-plane logs, and even security incident tracking reports all become part of your compliance posture.

For a Compliance Officer, CCO, or GRC lead, the fastest path is to turn this into a small, repeatable program: identify the systems that touch ePHI, define which records you will review, assign clear responsibilities, and document what “review” means (what you check, what you escalate, and how quickly). Then build an evidence package that stands on its own in an audit: written procedures, screenshots or exports showing reviews occurred, and tickets showing what you did about anomalies.

This page gives you requirement-level implementation guidance you can hand to Security Operations, IT, and application owners, with an evidence checklist and an execution plan that gets you to audit-ready operation quickly (45 CFR Parts 160, 162, 164).

Regulatory text

Requirement (HIPAA Security Rule): “Implement procedures to regularly review records of information system activity, such as audit logs, access reports, and security incident tracking reports.” (45 CFR Parts 160, 162, 164)

What the operator must do

You must (1) define procedures, (2) perform reviews regularly, and (3) review the right “records of information system activity,” including at least the examples named in the rule: audit logs, access reports, and security incident tracking reports (45 CFR Parts 160, 162, 164). In practice, regulators and auditors expect you to show:

• Coverage: in-scope systems that create or process ePHI generate reviewable records.
• Regular review: reviews happen on a defined cadence, and the cadence matches risk and system criticality.
• Follow-through: findings result in documented investigation, remediation, or closure rationale.
• Retention: you can produce evidence of reviews and outcomes after the fact.

Plain-English interpretation (what it means day to day)

If your systems can’t tell you “who did what, when, and from where,” you can’t reliably detect inappropriate access to ePHI. HIPAA does not prescribe a specific tool (SIEM, EDR, cloud-native logging), but it does require that you have procedures and can prove that someone reviewed activity records regularly (45 CFR Parts 160, 162, 164).

A useful working definition for audits:

• “Records” = logs and reports that show user activity, admin actions, access to ePHI, system changes, and security events.
• “Review” = a documented check by an accountable role, against defined criteria, with escalation when criteria are met.
• “Regularly” = a cadence you define, justify, and follow consistently.

Who it applies to (entity and operational context)

In-scope organizations

• HIPAA Covered Entities and Business Associates (45 CFR Parts 160, 162, 164).

In-scope environments

Apply this wherever ePHI is created, received, maintained, or transmitted, including:

• Clinical applications (EHR/EMR), patient portals, imaging systems.
• Identity and access systems (SSO/IdP), privileged access paths.
• Infrastructure hosting ePHI (servers, databases, cloud services).
• Security tooling and incident workflows (ticketing, IR tracking).
• Third-party systems handling ePHI: you remain accountable for ensuring activity is reviewed. If you cannot directly review logs, you need contractual and operational mechanisms to obtain and assess activity reports relevant to ePHI access.

What you actually need to do (step-by-step)

1) Set scope: build the “ePHI activity review inventory”

Create a list of systems that touch ePHI and define, per system:

• System owner (business and technical)
• Data type: ePHI yes/no, and where it resides
• Log sources available (application audit logs, OS logs, database logs, cloud audit logs)
• Access report availability (user access exports, privileged activity reports)
• Where logs are stored and how long they’re retained
• Method: manual review, automated alerting, or both

Deliverable: Information System Activity Review Register (a table is enough).

2) Define what “good review” looks like (review objectives + event criteria)

Write review criteria that a reviewer can execute consistently. Examples of criteria you can operationalize quickly:

• ePHI access by users outside expected roles (where role metadata exists)
• Access to “break-glass” accounts and emergency access pathways
• Privileged admin actions (new accounts, role changes, audit log disablement)
• Bulk exports, mass downloads, or unusually high query volume (where your system can report it)
• Access from unusual geographies or at unusual times (if tracked)
• Repeated failed logins or MFA failures indicating account attack
• Audit logging configuration changes

Keep criteria tied to evidence you can actually extract from your systems.

Deliverables:

• Information System Activity Review Procedure (who, what, where, when, escalation)
• Event/Alert Triage Guide (what triggers a ticket and severity mapping)

3) Set a risk-based cadence that you can follow

HIPAA does not dictate a specific cadence (45 CFR Parts 160, 162, 164). Choose a cadence you can execute consistently, then increase frequency for higher-risk systems. A common operator pattern:

• High-risk systems (EHR, IdP, privileged access): frequent review plus automated alerts
• Medium-risk systems: periodic review plus targeted alerts
• Low-risk systems: periodic spot checks, especially for admin changes

Document your rationale in the procedure. Consistency matters more than aspirational frequency you cannot sustain.

4) Assign roles and segregation of duties

Minimum role coverage:

• Control owner (GRC/Compliance or Security Governance): ensures procedure exists, metrics are tracked, evidence is retained.
• Reviewer (SecOps/IT): performs reviews and opens tickets.
• System owner: validates expected access patterns and approves remediation steps.
• Incident response lead: engages when events meet incident criteria.

Avoid “the system admin reviews their own admin activity” without secondary oversight. If staffing is limited, require periodic independent review by security leadership.

5) Centralize logging and standardize evidence capture

You can meet the requirement with distributed logs, but centralization simplifies auditability. Standardize:

• Where logs are stored (log platform, cloud-native logging, SIEM)
• How reviewers record completion (ticket, checklist, or review form)
• How you link findings to actions (ticket IDs, incident numbers, change requests)

If you use Daydream to run your control library and evidence collection, treat this requirement as a recurring control with scheduled tasks, assigned owners, and an evidence request template that pulls the same artifacts each cycle. That reduces “scramble work” during audits.

6) Build the escalation and closure workflow

A review without follow-up reads like a paper control. Define:

• What counts as an anomaly vs. expected activity
• Timeframe expectations for triage (internal targets are fine as guidance)
• Required documentation for closure: root cause, impacted systems, user(s), ePHI exposure assessment (if applicable), corrective action

Deliverable: Activity Review Triage Ticket Template.

7) Test the control

Run a tabletop for one or two realistic scenarios:

• A privileged role granted outside change control
• Multiple failed logins followed by successful access to ePHI system

Confirm that reviewers can find the relevant logs, document the review, and escalate with enough detail for investigation.

Required evidence and artifacts to retain (audit-ready)

Keep evidence that proves design and operation:

Design evidence (policy/procedure)

• Information System Activity Review Procedure (versioned, approved)
• System Activity Review Register (systems + log sources + owners)
• Role assignments / RACI for review and escalation
• Logging configuration standards or baseline requirements (where applicable)

Operating evidence (proof reviews happened)

• Completed review records (tickets, checklists, or attestation forms) showing:
  • date/time of review
  • reviewer name/role
  • systems/log sources reviewed
  • summary of findings
• Screenshots or exports that demonstrate reviewable records existed (audit logs, access reports)
• Incident tracking records tied to findings (security incident tracking reports) (45 CFR Parts 160, 162, 164)
• Investigation tickets and closure notes for anomalies
• Exception records where logs were unavailable, with remediation plan and compensating controls

Common exam/audit questions and hangups

Auditors and OCR-style inquiries often converge on the same points:

• “Show me the procedure, and show me the last few completed reviews.” (45 CFR Parts 160, 162, 164)
• “Which systems that store ePHI are in scope, and how do you know you didn’t miss any?”
• “Who reviews access to the EHR, and what do they look for?”
• “How do you detect and investigate inappropriate access?”
• “Do you review third-party hosted systems’ activity? If you can’t access logs, what reports do you get and how often?”
• “How do you ensure audit logs are protected from alteration or disablement?” (This connects to broader HIPAA technical safeguards, but your activity review procedure should still address log integrity assumptions.)

Frequent implementation mistakes and how to avoid them

Mistake	Why it fails	How to fix it
“We collect logs” with no review evidence	The requirement is review, not collection (45 CFR Parts 160, 162, 164)	Add a repeatable review record: ticket, checklist, or attestation with findings
Reviewing only firewall/SIEM alerts, not access reports	Alerts can miss inappropriate but “successful” access	Include application audit logs and access reports for ePHI systems
Cadence is documented but not followed	Gaps are easy to spot in audits	Pick a cadence you can sustain; track completion and overdue items
No escalation path	Reviews become a check-the-box exercise	Define thresholds and create tickets for anomalies, even if closed as benign
Third-party blind spot	ePHI often sits in hosted apps	Contract for audit logs or activity reports; document how you review them
No linkage between review and incident tracking	You can’t show response	Ensure anomalies link to incident or investigation records

Enforcement context and risk implications

No public enforcement cases were provided in the source catalog for this specific requirement, so this page does not cite any. Practically, weak activity review increases the chance that inappropriate access to ePHI goes undetected and uninvestigated, which raises breach reporting and patient harm risk. From an audit standpoint, the biggest exposure is inability to produce evidence of regular review and follow-up (45 CFR Parts 160, 162, 164).

Practical 30/60/90-day execution plan

First 30 days (stabilize and define)

• Name the control owner and reviewers; publish a RACI.
• Build the System Activity Review Register for ePHI systems.
• Draft and approve the Information System Activity Review Procedure.
• Stand up an evidence mechanism: a ticket type or compliance task with required fields.

Days 31–60 (operate and prove)

• Run the first full review cycle across in-scope systems.
• Tune criteria: remove non-actionable noise, add missing event types.
• Ensure every anomaly has a ticket with closure notes.
• Validate third-party reporting: confirm you can obtain access/activity reports for hosted ePHI systems.

Days 61–90 (harden and audit-proof)

• Add independence checks for privileged activity reviews.
• Formalize metrics: completion tracking, backlog of anomalies, recurring issues.
• Run a targeted test: pick a known admin change and trace it through logs to review evidence to closure.
• Prepare an “audit packet” in Daydream (or your GRC system): procedure, register, last completed reviews, sample tickets, and incident tracking excerpts.

Frequently Asked Questions

What counts as “regularly” for information system activity review under HIPAA?

HIPAA requires regular review but does not set a specific frequency (45 CFR Parts 160, 162, 164). Define a cadence per system based on risk, document it, and follow it consistently with retained evidence.

Do we need a SIEM to satisfy the information system activity review requirement?

No tool is mandated (45 CFR Parts 160, 162, 164). You do need a reliable way to access audit logs/access reports and produce evidence that reviews occurred and findings were handled.

Are access reports different from audit logs?

Often, yes. Access reports are typically user-access summaries (who accessed what) while audit logs can include broader system events (admin actions, configuration changes, security events) (45 CFR Parts 160, 162, 164).

How do we handle third-party systems where we can’t directly access logs?

Contract for activity reports or audit log access relevant to ePHI, then document your review of those records as part of your procedure (45 CFR Parts 160, 162, 164). Keep the reports and your review evidence.

What evidence is most convincing in an audit?

A versioned procedure plus a repeatable trail of completed reviews (tickets/checklists) that link to investigations or incident tracking where anomalies occurred (45 CFR Parts 160, 162, 164).

Our logs are noisy. Can we scope reviews to alerts only?

Alerts alone often miss inappropriate but authorized access. Keep alerting, but also include periodic reviews of access reports and key audit log categories for ePHI systems, then tune criteria to reduce noise over time (45 CFR Parts 160, 162, 164).