Annual internal control assessment
Compliance and IT assess AC-2, AU-6, CP-9, and IA-2 with evidence sampling. Findings feed the risk register and budget.
Security Assessments
High Risk
Moderate
Medium Cost
CA-2 requires developing a security assessment plan, assessing controls at organization-defined frequency and depth, producing security assessment reports, and providing results to designated officials. Assessments validate whether HIPAA-aligned NIST controls work in practice — not only on paper.
Control Objective
Independently and periodically assess whether implemented security controls on ePHI systems operate as intended and report results to leadership for remediation.
Implementation Guidance
- Define assessment scope (systems, controls, in-house vs third party).
- Build an assessment plan with methods (examine, interview, test) and schedule.
- Assess at least annually for critical systems, plus after major changes.
- Include technical testing samples (auth, logging, backups, segmentation) not only document review.
- Produce reports with findings, risk ratings, and owners.
- Track remediation to closure; retest failed controls.
- Share results with authorizing officials / compliance leadership.
- Coordinate with HIPAA evaluation (§ 164.308(a)(8)) and RA-3 updates.
Real-World Use Cases
How this control shows up in healthcare and HIPAA-covered environments.
Post-EHR migration assessment
After go-live, CA-2 focuses on logging, access roles, and transmission security before declaring the new environment fully accepted.
Third-party penetration test as input
Pen test results are mapped into CA-2/CA-7 monitoring and SI-2 remediation — not left as a standalone PDF.
Best Practices
- Written assessment plans before fieldwork.
- Mix document review with technical tests.
- Track findings to closure.
- Independent assessors for critical systems when feasible.
- Align cadence with HIPAA evaluation duties.
- Feed results into continuous monitoring (CA-7).
Common Gaps & Violations
- Policy binder review only — no technical tests.
- Assessment reports with no remediation owners.
- One assessment years ago never repeated.
- Scope excludes cloud/BA systems holding ePHI.
- Findings closed on promise without retest.
Required Documentation
- Security assessment plan(s)
- Assessment reports and evidence packs
- Findings/remediation tracker
- Assessor independence statements (if applicable)
- Leadership briefing records
How to Test & Validate
- Confirm last assessment date within policy frequency.
- Sample findings for remediation evidence and retest.
- Verify assessment plan existed before fieldwork.
- Check scope includes critical ePHI systems.
- Confirm results were delivered to designated officials.
Audit Considerations
HIPAA evaluation and NIST CA-2 both expect periodic assessment evidence. Stale or purely documentary assessments are weak.
HIPAA Mapping
How this NIST control supports HIPAA Security Rule expectations.
- 164.308(a)(8) Evaluation — periodic technical and nontechnical evaluation of security safeguards.
- 164.308(a)(1) Risk Management — assessments inform whether measures remain reasonable and appropriate.
- 164.316 Documentation — retain assessment documentation.
- 164.306 General rules — flexibility still requires documented evaluation of safeguards.
Compliance Tips
- Calendar CA-2 alongside budget season so findings get funded.
- Use a standard evidence request list to speed annual assessments.
- Map each finding to a NIST control ID and HIPAA safeguard for clarity.
Frequently Asked Questions
Is a risk analysis (RA-3) the same as CA-2?
No. RA-3 identifies risks; CA-2 assesses whether selected controls are implemented and effective.
How often should we assess?
Define frequency by system criticality (often annual for key ePHI systems) plus event-driven assessments.
Can we use external auditors for CA-2?
Yes — third-party assessments are common and can improve independence.
References & Resources
- NIST SP 800-53 Rev. 5 — CA-2
- NIST SP 800-53A Assessing Security and Privacy Controls
- Related controls: CA-7, RA-3, RA-5, PM-4
Related Guidelines
Related controls that commonly accompany CA-2.
Need Help Implementing CA-2?
Our auditors map NIST SP 800-53 controls to your HIPAA Security Rule program — policies, technical evidence, and audit readiness.