For many healthcare organizations, the move to a new EHR feels like the finish line. Contracts are ending. Implementation timelines are locked. Teams are focused on go-live, training, data migration, and daily operational continuity.
But legacy systems do not automatically disappear when a new platform goes live.
They remain in the background, carrying historical clinical, financial, operational, and scanned data that still needs to be retained, searched, retrieved, and produced when needed. That’s why legacy data retention deserves attention before an EHR transition, acquisition, contract deadline, or system retirement is already underway.
A legacy system is an outdated or unsupported application that your organization no longer plans to use but may still depend on for historical records.
This includes obvious systems like a retired inpatient or ambulatory EHR. It can also include smaller departmental systems, acquired practice systems, home health platforms, imaging repositories, document management tools, and scanned files sitting inside applications no one thinks about until they are needed.
And this is where your retention risk begins. A record can technically exist, but if your team cannot find it, validate it, access it, or produce it in the right format, it’s not truly usable.
Legacy healthcare systems tend to create four retention risks that CIO, IT, and HIM teams should address early.
1. Incomplete system inventory
Many teams begin with the systems they know they’re replacing. That’s a necessary starting point, but it’s rarely enough. Historical data often lives in smaller pockets across departments, acquisitions, specialty practices, and old workflows.
A strong inventory should capture more than the system name. It should document how the system was used, which data lives there, what reports still run from it, what interfaces connect to it, and which teams rely on the information.
2. Unclear retention requirements
Not every data set needs to be kept the same way or for the same length of time. Clinical records, scanned documents, billing history, and business records may each carry different retention expectations.
HIM involvement is essential here. Retention decisions affect release of information, audit response, continuity of care, and day-to-day medical records work. Treating legacy archiving as an IT-only project can leave operational gaps that surface later.
3. Limited access to legacy data
Hosted environments and vendor-managed systems can create unexpected barriers. For example, some vendors may be slow to cooperate or may charge significant fees for data extracts.
These activities create timing risk. If a legacy contract is ending, access questions need to be resolved before the organization is forced into an extension simply to retrieve its own historical data.
4. Scanned documents that are harder to manage than expected
Scanned documents often become one of the largest surprises. They may exist in multiple systems, vary in readability, lack consistent indexing, or require special extraction methods.
For HIM teams, scanned content can be especially important because it often contains the exact documentation needed for audits, payer requests, legal review, or patient record requests. If those files aren’t searchable and tied to the right patient or encounter context, retrieval becomes slow and unreliable.
This work prevents two common outcomes: retaining too little and creating gaps or retaining everything in a way that’s expensive and hard to search.
Faith Health’s move to a new EHR, Epic, created a familiar retention challenge. The organization couldn’t shut down its old systems until it knew historical data would remain accurate, searchable, and available after decommissioning.
Access helped Faith Health turn the complexity of archiving a minimum of eight legacy systems’ data and added pressure of timing risk into a structured archive plan. The work included extraction, conversion, validation, and secure storage in Access Unify® | Health. Access worked with Faith Health to confirm what needed to be retained, how it should be extracted and validated, and how authorized users would access it once the old applications were retired.
To hear Faith Health’s story in more detail, watch the webinar recording of “Know the Unknowns: Hidden Risks in Legacy Data and How CIOs Defuse Them.”
In this session, Brian Sterud, CIO and CISO at Faith Regional Health Services and recipient of the CHIME Lifetime Achievement Award, shares how his organization uncovered and addressed unknown risks while archiving data from 13 systems across more than 40…
Faith Health’s experience shows why legacy data retention should be planned before go-live, not after. Once a new EHR is established, the old systems may feel less urgent. But the data inside them still supports patient care, release of information, audits, reporting, financial follow-up, and long-term compliance.
The best time to reduce retention risk is while teams still have access to the people, systems, contracts, and vendor support needed to make informed decisions. That means identifying every system in scope, confirming what data needs to be retained, documenting extraction requirements, validating completeness, and giving authorized users a reliable way to search and retrieve records after decommissioning.
To learn how Access can support legacy EHR retirement and healthcare data archiving, explore our Access Unify® | Health solution.
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