Start with the federal floor — and what it really says
The single most-quoted retention rule on the internet is 'HIPAA requires medical records to be kept for six years.' It's repeated everywhere. It's also not quite right, and the wrong version causes families to assume their records are safe when they may not be.
What HIPAA actually says, in §164.530(j) of the privacy rule, is that covered entities must retain documentation of their HIPAA compliance — written policies, procedures, complaint logs, authorizations, breach notifications, training records — for six years from the date the documentation was created or last in effect, whichever is later. That six-year clock applies to the paperwork a hospital uses to prove it's HIPAA-compliant. Your individual chart isn't HIPAA documentation in this sense; it's a medical record.
The federal rule that actually sets a floor for medical records themselves is buried in Medicare's conditions of participation. Hospitals that bill Medicare must keep medical records for at least five years after the last episode of care. Critical-access hospitals and certain other facilities are held to similar timelines, and provider records under Medicare Advantage rules run longer still. This is the federal floor that touches the chart itself, and it's the one most hospital records-management policies anchor to.
What this means practically: if a provider tells you they're keeping records 'per HIPAA,' the honest interpretation is that they're following the federal six-year compliance-documentation rule and probably also the five-year Medicare rule, and almost certainly the state law on top of those. Asking 'how long are records kept under your state's retention policy?' tends to get you a sharper answer than asking about HIPAA.