JD
Primary Payer
Payer responsible for payment first
Primary
Secondary Payer
Payer responsible after primary
Secondary
COB History
Claim IDDOSBilledPrimary PaidSecondary PaidPatient Resp.Method
CLM-2025-0472212025-03-01$1,840.00$1,288.00$276.00$276.00Coord.
CLM-2025-0391182025-02-14$640.00$448.00$128.00$64.00Coord.
CLM-2025-0288442025-01-22$3,120.00$2,184.00$624.00$312.00Non-Dup
Line-Level COB
Per-procedure COB calculation for multi-line claims
LineCPTDescriptionBilledPrimary PaidSecondary PaysPatient
199214Office Visit — Moderate Complexity$285.00$199.50$50.75$34.75
293000Electrocardiogram$92.00$64.40$18.40$9.20
385025Complete blood count$48.00$33.60$9.60$4.80
Totals$425.00$297.50$78.75$48.75
Dental COB
Dental plan coordination using Maintenance of Benefits method
Primary Annual Max
$1,500.00
Used: $842.00
Secondary Annual Max
$1,000.00
Used: $317.00
Patient Paid YTD
$247.50
This plan year
ProcedureCDT CodeFeePrimary %Secondary %Patient
Composite Filling — 2 surf.D2150$195.0080% ($156)15% ($29.25)$9.75
Crown — PorcelainD2740$1,250.0050% ($625)25% ($312.50)$312.50
Oral Exam — Comp.D0150$85.00100% ($85)0% ($0)$0.00
AI Assistant

COB ensures that when a member has multiple insurance plans, total payments do not exceed the actual charges. This prevents overpayment and calculates the correct patient responsibility.

  • Coordination Method: Secondary fills gap between primary payment and allowed amount
  • Non-Duplication: Secondary only pays if primary pays less than secondary would alone
  • Maintenance of Benefits: Secondary pays as if it were primary for benefits not covered by primary

For dependents covered by both parents' plans, the plan of the parent whose birthday falls earlier in the year is primary. The other parent's plan is secondary.

  • Always enter primary EOB data before calculating secondary
  • Dental COB uses separate annual maximums per plan
  • MSP (Medicare Secondary Payer) rules apply when Medicare is not primary