Disability & Income
Pre-Existing Condition Clauses In Disability Cover
Disability policies look backwards at a defined window before cover began, and a condition merely investigated during that window can defeat a later claim.

Disability policies contain a look-back provision that examines the period before cover started. It operates differently from health insurance rules and catches conditions the claimant considered minor at the time.
How the clause is structured
The provision defines a look-back window before the effective date and a subsequent exclusion period after it, both measured in months.
A disability beginning within the exclusion period, caused by a condition falling inside the look-back window, is not covered.
Once the exclusion period passes, the clause stops applying entirely, and the same condition can support a claim without restriction.
What counts as a pre-existing condition
Most wordings capture conditions for which the person received treatment, consulted a practitioner, took medication or underwent diagnostic testing during the window.
Testing is the element that surprises claimants. An investigation that produced no diagnosis can still bring the underlying condition within the clause.
Some definitions extend further, to symptoms that would have caused an ordinarily prudent person to seek care, which reaches conditions never presented to a doctor at all.
The causation question
Disputes usually turn on whether the disabling condition is the same as the pre-existing one or a distinct condition that happens to affect the same system.
Insurers tend to read the connection broadly, treating related conditions as one; claimants read it narrowly, distinguishing diagnoses.
Medical records from the look-back period decide these arguments, which means the outcome is largely determined by documents written before anyone contemplated a claim.
Why group cover differs from individual cover
Group disability plans typically use these clauses in place of individual underwriting, since members are enrolled without medical questions.
Individual policies underwrite up front instead, excluding or rating known conditions explicitly, so what is covered is stated rather than discovered later.
The trade is visibility. An individual policy tells the applicant which conditions are excluded; a group plan leaves that determination to be made at claim time.
Continuity provisions between plans
Where an employer changes insurer, continuity provisions often credit time served under the previous plan so members do not restart the exclusion period.
These provisions are not automatic and depend on the takeover terms negotiated between the employer and the new insurer.
Look-back windows, exclusion periods, definitions and continuity rules vary between contracts and jurisdictions and change over time, so the plan documents govern.
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