Special Situations — Module 4 | SupportDDS Training Academy

Comparison showing trained versus untrained specialist outcomes

Coordination of Benefits (COB)

When a patient has two dental insurance plans (e.g., their own employer plan plus their spouse's plan), you need to determine which is primary and which is secondary.

The Birthday Rule: When both parents cover a child, the parent whose birthday falls earlier in the calendar year (not the older parent) has the primary plan. If same birthday, the plan in effect longer is primary.

Missing Tooth Clause

Some plans will not cover the replacement of a tooth that was lost before the patient's coverage began. If a patient had a tooth extracted in 2024 and their current plan started in 2025, a bridge or implant to replace that tooth may be excluded.

Pre-Authorization

Certain procedures (usually major services like crowns, bridges, implants, and orthodontics) require prior approval from the insurance company before treatment. Without pre-auth, the claim may be denied even if the procedure is otherwise covered.

Practice Scenario: Walk Through a Verification

Patient: Sarah Johnson, DOB: 06/22/1990
Insurance: Delta Dental DPPO (through employer)
Procedure needed: Crown on tooth #14 (D2740)
Coverage start date: January 1, 2026

Sarah needs a porcelain crown. What's your first step?

Correct! Always verify eligibility first.

You call Delta Dental. Coverage is active. Effective date: January 1, 2026.
The plan is a DPPO with a $50 annual deductible (met) and $1,500 annual maximum ($1,200 remaining).

A crown (D2740) is a Major service. What benefit percentage applies?

Correct! Crowns are Major services, typically covered at 50%.

The crown costs $1,200. At 50% coverage, Delta Dental pays $600 and Sarah pays $600.
But wait — you still need to check more fields.

Sarah's plan started January 1, 2026. The crown is a major service. What should you check next?

Not quite. Crowns are categorized as Major services. Most DPPO plans cover major services at 50%.

Let's continue. The crown costs $1,200 at 50% coverage. What should you check next?

Smart! Many plans have a 12-month waiting period for major services.

You ask Delta Dental: "Is there a waiting period for major services?"
The rep confirms: "Yes, 12-month waiting period for major services."
Sarah's coverage started January 1, 2026. Today is March 24, 2026.

Can Sarah get the crown now?

Excellent work!

You correctly identified the waiting period issue. Sarah's major services won't be covered until January 1, 2027.

What to do now:

Document the waiting period in the PMS
Get a reference number from the Delta Dental rep
Notify the treatment coordinator
The practice can inform Sarah and discuss options (wait, pay out-of-pocket, or check secondary insurance)

This is exactly the kind of situation that costs practices thousands when verification is skipped.

Not quite.

Even though Sarah has active coverage and remaining benefits, the 12-month waiting period for major services means the crown won't be covered until January 1, 2027. This is exactly the scenario from our opening story — the waiting period trap.

Always verify eligibility first! Never schedule treatment or rely on the patient's word alone. The insurance company is the only source of truth.