The short answer
Pull your adjustment report by reason code for the last 6 to 12 months. Separate contractual adjustments, which your payer contracts require, from everything else: denial, timely filing, small-balance, bad-debt and unlabeled write-offs. Any non-contractual write-off on a claim still inside its filing, appeal or reopening window may still be collectible. Reverse it and work it.
This applies whether your billing team is in-house staff or an outside company. Write-offs are a normal part of billing. The question is whether each one was a decision someone made on purpose, with a reason on file.
Contractual adjustments vs everything else
Contractual adjustments are expected. Everything else on the adjustment report is a decision, and each type has a narrow set of cases where it is the right one.
| Adjustment type | What it means | Legitimate when |
|---|---|---|
| Contractual | Charge above the contracted allowable | The amount matches the contract |
| Denial write-off | Payer denied; nobody appealed | Appeal reviewed and not viable, reason documented |
| Timely filing | Filed too late | Rarely. It is an operational loss |
| Small balance | Under a set dollar threshold | Written policy, applied consistently |
| Bad debt (patient) | Patient did not pay after collection attempts | Good-faith attempts documented |
| Unlabeled / "cleanup" | No reason code | Never acceptable |
The remittance already sorts some of this for you. Claim adjustment group codes, maintained by X12, separate contractual obligation (CO) from patient responsibility (PR) and other adjustments (OA).
A "contractual" label is not proof on its own. A contractual adjustment larger than the contract allows is an underpayment posted to look normal. Spot-check a sample against the fee schedule.
The number that hides it
Net collection rate is the number most practices use to judge their billing team. It is also the easiest place for write-offs to disappear, because the result depends entirely on what is subtracted.
That is the formula HFMA describes. HFMA puts the floor at 95%, with 97 to 99% optimal, and bad debt and unnecessary write-offs under 3% of expected collections.
The trap. If denial, timely filing and small-balance write-offs are also subtracted from the denominator, they leave the math entirely. The rate can look near-perfect while money is being lost, because the lost money no longer counts as expected. Only approved contractual adjustments belong there.
Ask whoever reports your rate, in-house or outside, for the exact formula in writing, including which adjustment codes come out of the denominator. Then check how your billing performance measures up.
The adjustment audit
An owner or administrator can run this without billing software expertise. It needs one report, a fee schedule, and a few hours.
- 01Request the report. Ask for 6 to 12 months of adjustments by reason code, payer, and the person or account that posted them. If you need wording, ask for the adjustment report.
- 02Set aside contractual adjustments. Spot-check 20 of them against the fee schedule. Any that exceed the contract are underpayments.
- 03Sort the rest. Put each remaining adjustment into one of the categories in section 2. Flag anything unlabeled.
- 04Question every denial write-off. Was it appealed? How many days passed between the denial and the write-off?
- 05Reverse what is still open. For every write-off still inside a filing, appeal or reopening window, reverse it and work it. Check each claim's filing window.
- 06Check patient-side write-offs against policy. Compare them to your written financial hardship policy (section 5).
- 07Add an approval rule. Write-offs above a set amount need a named approver, recorded on the account.
Timing decides most of the outcome. In one AR recovery engagement, claims worked within four to five days of rejection were recoverable; claims found a year later usually were not. Speed matters more than effort.
Patient write-offs and the OIG
Writing off patient balances is not only a revenue question. For Medicare patients, it can be a compliance question.
The OIG's Special Fraud Alert on routine waiver of copayments or deductibles, republished in the Federal Register on 19 December 1994, says a provider who routinely waives Medicare copayments or deductibles is misstating its actual charge, and in certain cases could be liable under the anti-kickback statute and false claims laws. Outside special cases, a good-faith effort to collect must be made. The alert names genuine financial hardship of a particular patient as the recognized exception, and it lists routine use of hardship forms with no good-faith look at the patient's finances as a warning sign.
What it means. A blanket "write off every patient balance under $X" policy, with no collection attempt, needs review by a healthcare attorney. Bring the written policy and a sample of the write-offs posted under it.
When the audit finds more than one person can work
Reversed write-offs are a backlog with deadlines. Each one sits inside a filing, appeal or reopening window that keeps closing while it waits.
Work them in deadline order, shortest window first, not by dollar amount or by payer. Then fix the cause, or the same write-offs will be back next quarter. If the pattern points to denials that nobody is touching, check whether denials are being worked.
If the list is longer than your billing team can clear alongside current claims, work the reversed claims as one project, separate from day-to-day billing.