Now, the question is how far back will insurers check your medical records to ensure that coverage applies? Travel insurance companies impose a “look-back period,” which is a specific time frame when a pre-existing condition is considered stable, usually between 60 and 180 days. To qualify for a waiver, your condition must be stable within this period, meaning it has not changed or worsened. There must also be no new treatments, medications, or diagnoses, or any scheduled treatments, lab tests, or medical procedures.