UNDERPAYMENT PLAYBOOK · SECONDARY / COB SHORTFALL

How to recover a Secondary / COB Shortfall underpayment

A coordination-of-benefits shortfall is when the secondary payer pays less than the remaining balance after the primary, leaving a gap it should have covered under the plan's coordination rules.

How it shows up: The secondary payer paid less than the balance left after the primary's EOB

Why it happens

  • The secondary applied its own fee schedule instead of covering the balance
  • The primary EOB wasn't read into the coordination correctly
  • The primary/secondary order or benefits were mis-coordinated
  • The secondary processed the claim as if it were primary

What recovers it

  • Submit the primary EOB with the coordination math laid out
  • Show the secondary's obligation under the plan's COB rules
  • Request reprocessing to cover the correct balance
  • Confirm and document the correct primary/secondary order

Worth recovering? COB shortfalls hide in the gap between two payers, the balance is recoverable once the secondary is shown its true coordination obligation.

Common questions

How do I recover a Secondary / COB Shortfall underpayment?

A coordination-of-benefits shortfall is when the secondary payer pays less than the remaining balance after the primary, leaving a gap it should have covered under the plan's coordination rules. To recover it: submit the primary EOB with the coordination math laid out; show the secondary's obligation under the plan's COB rules; request reprocessing to cover the correct balance; confirm and document the correct primary/secondary order. Because the claim already paid, the hard part is catching it, reconciling the allowed amount against what you were actually owed.

Is a Secondary / COB Shortfall underpayment worth recovering?

COB shortfalls hide in the gap between two payers, the balance is recoverable once the secondary is shown its true coordination obligation. A no-risk service makes it easy to find out, you only pay on what's actually recovered, so there's no cost to surfacing the ones that are real.

How does Volari find Secondary / COB Shortfall underpayments?

Volari reconciles every remittance line's paid and allowed amounts against what your contract and the payer's own rules say you should have been paid, surfaces the secondary / cob shortfall shortfalls no one flagged, and works the recovery. You pay 25% only on what's recovered, and nothing if nothing comes back.

Other underpayment types
Paid Below Fee Schedule →Multiple Procedure Payment Reduction (MPPR) →Modifier Payment Reductions (Bilateral, Assistant, Co-Surgeon) →Bundling That Reduced Payment →Sequestration Over-Applied →Silent PPO / Rental Network Repricing →Outdated or Wrong Fee Schedule →Out-of-Network Underpayment →E/M Downcoding Underpayment →Drug / J-Code Underpayment →Missing Prompt-Pay Interest →Recoupment & Offset Errors →Site-of-Service Payment Differential →"Lesser of Billed Charges" Trap →TC/26 Professional-Technical Split Paid Wrong →Global-Period Payment Errors →

Volari's AI agentic crew that works your pile

The same AI agents that reconcile every line and recover your secondary / cob shortfall underpayments inside the app, each a specialist at one part of the fight, paid only on what they bring back.

Reva
Lead
Cody
Coding
Denny
Appeals
Faye
Follow-up
Iris
Intel

See what you were underpaid, line by line.

Upload your remittances and Volari reconciles every paid amount against what you were owed. No risk, paid only on what we recover.

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