The Basics
The Family Tree
Split Homes
Special Situations
The Money Trail
100

This is the primary goal of COB: to ensure total payments do not exceed this percentage of the claim.

What is 100%

100

This rule determines the primary plan for children based on the calendar year.

What is the Birthday Rule

100

This specific legal document always overrides standard COB rules for children.

What is a Court Decree

100

This government program is always the "Payer of Last Resort."

What is Medicaid

100

A secondary carrier cannot process a claim without this document from the primary carrier.

What is an EOB

200

This plan always pays first, as if no other insurance exists.

What is the Primary Plan

200

To determine the birthday rule, you look at these two pieces of data, but never the year. (

What are the Month and Day

200

In the absence of a court decree, this parent’s plan is primary.

What is the Custodial Parent


200

If an injury happens at a workplace, this insurance must be billed before health insurance.

What is Workers Compensation

200

This is the math: Total Allowable − Primary Payment = this.

What is the Secondary Responsibility

300

If a person has a plan through their current employer and a plan as a spouse's dependent, this one is primary.

What is the Member's Employer Plan

300

If Mom’s birthday is Jan 1 and Dad’s is Jan 1, this parent’s plan is primary if they have had it for 5 years while the other has had theirs for 2.

Who is Mom

300

If a custodial parent remarries, this person’s insurance usually pays second (after the custodial parent).

What is the Step-parent

300

For a 68-year-old active employee at a company with 50 employees, this insurance is primary to Medicare.

What is the Employer Group Health Plan

300

This COB method ensures the member has $0 out-of-pocket as long as the total doesn't exceed the allowable.

What is Traditional Coordination

400

This term refers to the maximum amount an insurance company agrees to pay for a specific service.

What is the Allowable Expense/Amount

400

True or False: If a child is over 18 but still a dependent, the Birthday Rule no longer applies.

What is False

400

This is the payment order for a child with no court decree: Custodial, Stepparent, and finally this person.

Who is the Non-Custodial Parent

400

A plan for an "Active" employee is always primary over this type of "Inactive" extension coverage.

What is COBRA

400

This specific COB method only pays what it would have paid as primary, minus what the actual primary already paid.

What is Non-Duplication of Benefits

500

This is the standard "tie-breaker" rule if two plans have the exact same priority level.

What is Length of Coverage rule

500

In the order of benefits, a plan covering a person as a "Subscriber" always pays before a plan covering them as this.

What is Dependent

500

If a court decree says "both parents are responsible," COB defaults back to this rule.

What is the Birthday Rule

500

This "Fault" or "No-Fault" insurance is primary for medical bills resulting from a car crash.

What is Auto Insurance

500

 If the primary carrier denies a claim for "No Authorization," the secondary carrier usually does this.

What is deny the claim