Unlabeled rehab clinic USB
Therapist carries patient home-exercise videos on an unmarked stick. MP-3 labeling and encryption policy makes unmarked ePHI media a confiscation event at the clinic desk.
Media Marking
Medium Risk
Easy
Low Cost
MP-3 requires marking system media indicating the distribution limitations, handling caveats, and applicable security markings of information. Unlabeled backup tapes, USB drives from HIM, and loose discs with imaging studies are classic ways ePHI leaves controlled workflows unmarked and mishandled.
Control Objective
Ensure media that stores or transports ePHI (or security-relevant data) carries markings that tell handlers distribution limits and sensitivity so it is not treated like ordinary office media.
Implementation Guidance
- Define marking standards for digital and physical media containing ePHI (labels, RFID tags, header banners for prints).
- Mark removable drives, tapes, optical media, and portable clinical devices used for data transfer.
- Apply distribution limitation statements (e.g., internal use, BA only).
- Train HIM, biomed, and IT on when marking is required vs exempt (public data).
- Verify printers/fax cover sheets and output banners for ePHI print jobs where feasible.
- Include cloud export packages and encrypted zip distributions in marking/procedure analogs.
- Inspect media at intake/egress points (PE-16) for required marks.
- Remake labels when classification changes after sanitization or downgrade (MP-8).
Real-World Use Cases
How this control shows up in healthcare and HIPAA-covered environments.
Backup tape offsite bin
Nightly EHR tapes lack sensitivity labels. Courier treats them as generic inventory; MP-3 marking plus sealed containers fix handling cues.
Radiology disc for outside read
CD burned for a referring physician shows patient label and Confidential-ePHI marking with minimum necessary study only.
Best Practices
- Simple, consistent ePHI media labels.
- Marking before media leaves secure areas.
- Train high-volume handlers (HIM, imaging).
- Pair marks with MP-4 storage rules.
- Cover print/film outputs where used.
- Re-mark after content changes.
Common Gaps & Violations
- USB drives with ePHI and no labels.
- Tapes tracked only by barcode with no sensitivity cue.
- Staff assume encryption removes need to mark.
- Printed rounding lists without banners.
- Vendor media accepted unmarked into data center.
Required Documentation
- Media marking procedure (MP-3)
- Label templates and examples
- Training records for media handlers
- Exception list for unmarked public media
- Spot-check inspection logs
How to Test & Validate
- Sample removable media in clinical areas for labels.
- Inspect backup/media storage for markings.
- Review print job banner configuration for ePHI apps.
- Interview HIM staff on marking steps.
- Check PE-16 intake rejects unmarked sensitive media.
Audit Considerations
Walkthroughs quickly find unmarked media. Assessors correlate MP-3 with MP-4/MP-5 and breach cases involving lost unlabeled drives.
HIPAA Mapping
How this NIST control supports HIPAA Security Rule expectations.
- 164.310(d) Device and Media Controls — policies for receipt and removal of hardware and electronic media; marking supports proper handling.
- 164.530(c) Safeguards — reasonable safeguards for PHI include controlling how media is identified and handled.
- 164.312(a) Access Control — media markings reinforce that content is restricted.
- 164.308(a)(1) Risk Management — unlabeled media is a foreseeable loss/disclosure risk.
Compliance Tips
- Stock pre-printed ePHI media labels at nursing/HIM supply points.
- Refuse unmarked USB use on EHR workstations via policy and DLP.
- Align marking text with your confidentiality classification scheme.
Frequently Asked Questions
Does encryption eliminate the need for MP-3?
No. Encryption protects confidentiality; marking communicates handling requirements to people who move and store the media.
Are virtual machine images media?
Treat portable system images and export packages under media controls with equivalent labeling/metadata in the repository.
What about de-identified media?
If truly de-identified per policy, marking may differ — document the standard so staff do not guess.
References & Resources
- NIST SP 800-53 Rev. 5 — MP-3
- Related controls: MP-4, MP-5, MP-6, MP-2, AC-16
Related Guidelines
Related controls that commonly accompany MP-3.
Need Help Implementing MP-3?
Our auditors map NIST SP 800-53 controls to your HIPAA Security Rule program — policies, technical evidence, and audit readiness.