Reading a dental EOB: adjustments, downgrades and zero-pays

Posting is treated as clerical work in most practices, which is why it is where revenue quietly disappears. The person posting is making decisions about what the practice is owed, what the patient is owed, and what is being written off permanently, usually at speed and usually without anyone checking.

The four numbers on every line

1. The submitted fee — what the practice billed.
2. The allowed amount — the maximum the plan recognises for that procedure under its contract with the practice. The gap between submitted and allowed is the contractual adjustment.
3. The plan payment — what is actually being sent.
4. Patient responsibility — deductible, coinsurance, and anything not covered.

Allowed minus plan payment should equal patient responsibility. Where it does not, something else happened on that line and the remark codes are where it is explained.

The write-off that should never be taken

A contractual adjustment exists because the practice agreed to it by joining the network. It is only owed where the practice is in network with that plan.

Taking the adjustment on an out-of-network claim gives away money the practice was entitled to bill the patient for, and it is permanent — once written off, nothing flags it. Practice management systems make this easy to do by accident, because the posting screen offers the adjustment field regardless of participation status.

What the different zero-pay lines actually mean

A line paying nothing is not one thing, and the four reasons below need four different responses.

• Applied to deductible. The plan is working; the amount is the patient's and should be billed.
• Bundled into another procedure. The fee has been absorbed into a line that was paid. Appealing it rarely works where the bundling is correct, and the useful question is whether the pairing should have been billed at all.
• Denied for documentation. The claim is recoverable. This is the category that justifies someone reading EOBs rather than posting them.
• Excluded by the contract. Not recoverable, and not worth appealing. The patient owes it, and the conversation should have happened before treatment.

A downgrade looks like none of these and is easy to miss: the line is paid, nothing is denied, and the allowed amount is simply lower than expected because the plan allowed a different material or a lesser procedure. A posterior composite paid at the amalgam rate shows up this way, as does a cast partial allowed against a bridge.

Post against the EOB, never against the deposit

A bulk payment covering fourteen patients reconciles to the bank without anyone having examined a single line. The total matches, the day balances, and four denials inside it are never seen.

Posting line by line against each EOB is slower and it is the only method that surfaces denials at the point they can still be worked. Where a practice has aging it cannot explain, this is almost always where to look first.

Virtual credit cards, and the fee nobody agreed to

A growing share of payers now send payment as a virtual credit card number rather than an electronic transfer or a cheque. Processing it incurs the practice's normal card processing fee, which on a four-figure payment is a meaningful sum deducted from money already allowed.

Payers are generally required to offer an alternative on request, and most practices have never asked. It is a single phone call per payer and it does not recur.

Zero-pay EOBs still have to be posted

An EOB paying nothing is the one most likely to be set aside, and setting it aside is how a claim ages invisibly. Until it is posted, the claim still reads as outstanding on the aging report and nobody can tell the difference between a claim awaiting adjudication and one that was denied five weeks ago.

The discipline that fixes it is unglamorous: every EOB received is posted the week it arrives, denials included, and the denials go onto a worklist as they are posted rather than being collected for a rainy day that does not come.