HL7 v2 ROL-5 (Role Begin Date/Time): Format, Values, and Testing Notes
ROL-5 records when a role actually took effect, and it is the field that makes it possible to tell an on-call provider handoff from a data-entry correction after the fact.
ROL-5 is a timestamp marking when the role identified in the segment became effective. For a role that never changes hands during an encounter, it is often close to the encounter start time; for one that is reassigned partway through, such as a consulting provider added mid-stay, it reflects the actual moment that reassignment happened.
What this field contains
Example
ROL-5 here is 20260727093000, a fabricated timestamp roughly a day before the message itself would have been sent.
Where this trips people up
It is common to see this field populated with whatever timestamp the message-generation tool happens to be using at send time, rather than a value that reflects when the role genuinely began. That distinction rarely matters for a single static role, but it matters a great deal for scenarios like a consulting provider being added two days into a stay, where downstream reporting or billing logic needs the real effective date to calculate duration correctly. If every ROL-5 in your test data lines up suspiciously close to MSH-7, that logic is not actually being tested.