Benefits rules that determine which plan pays first when more than one plan can respond.
Coordination of benefits is the process used when more than one benefits plan could pay the same expense, so the plans can determine which pays first and what remains eligible for the second plan.
This is one of the most practical terms in private Canadian benefits administration. Without coordination rules, members submit claims to the wrong plan, expect double recovery, or misunderstand why one plan paid only part of the bill.
The core idea is order, not generosity. Coordination rules decide sequence, not unlimited reimbursement.
Coordination of benefits usually appears when a claimant has overlapping private coverage, for example through:
One plan is treated as primary. If there is an eligible unpaid balance after that plan responds, the second plan may then consider the remainder under its own rules.
| Situation | Typical first submission question |
|---|---|
| Employee claiming under their own plan and also covered as a dependent elsewhere | Submit to the employee’s own plan first |
| Spouse covered under their own employer plan and also under partner’s plan | Submit to the spouse’s own plan first |
| Dependent child covered under both parents’ plans | Follow the administrator’s dependent-child order rules, which may use a birthday-style ordering convention |
These patterns are common, not absolute. Administrators still apply their own coordination rules and claim instructions.
A child has dental coverage under both parents’ group plans. The first plan pays according to its schedule. The second plan then reviews the unpaid eligible balance and may reimburse more, but only to the extent its own coverage rules allow.
| Assumption | Better reading |
|---|---|
| Two plans mean automatic double payment | Plans usually coordinate so total reimbursement does not exceed the eligible expense |
| The second plan must pay whatever the first plan did not pay | The second plan still applies its own limits, exclusions, and eligible-expense rules |
| Coordination matters only for large employers | It matters anywhere overlapping private benefits exist |
Coordination of benefits does not guarantee full reimbursement. If both plans limit the same expense, the claimant may still have out-of-pocket cost.
It is also not limited to drug claims. Dental, paramedical, vision, and other benefits can all raise coordination questions.
Readers sometimes try to submit to the plan they think is “better” first. The plan order is usually determined by coordination rules, not by preference.
Plan-administrator rules, provincial practices, and benefit categories can change the exact sequence. Coordination in disability income coverage may also be framed differently from dental or extended-health coordination, so the specific booklet or claim instructions still matter.