Before the letter arrives

A UPIC contractor pulls thirty of your claims for review. Twelve fail documentation. That is a 40 percent error rate. The disallowed dollars on those twelve claims might total twelve or fifteen thousand. Most providers brace for that number, write the check, and move on.

Then the demand letter arrives applying that 40 percent rate to the entirety of their billing during the audit window. Twelve months of paid claims. Four hundred thousand dollars. Sometimes more.

That is extrapolation. It is the mechanism that turns a documentation problem you thought was modest into one that can close your business. I currently conduct audit reviews for a major national multiemployer benefit fund — different payer from Medicare, same evaluation framework. The patterns I see in the actual claim files I review week after week are remarkably consistent with what UPIC and RAC contractors find on the Medicare side. And the providers who get hit hardest are rarely the ones running sloppy operations. They are the ones who believed their documentation was fine until someone actually checked it.

Auditors do not fish broadly. They examine four documentation pillars on essentially every claim. Knowing what those four pillars are, and being honest with yourself about how your operation performs against each one, is the whole game.

Delivery and shipment defensibility

The proof of delivery has to be on file, signed, dated, and aligned with the date of service on the claim. The single most common finding I see is a POD that exists, is signed, is on file, and shows a delivery date that does not match the DOS billed. It does not matter that the equipment was actually delivered. The documentation says one thing, the claim says another, and the claim loses.

Diagnosis code adequacy

The diagnosis on the claim has to support medical necessity for the specific HCPCS being billed. A general respiratory diagnosis on an oxygen claim that requires more specificity is not enough. A sleep apnea diagnosis on a PAP claim has to tie back to documented AHI values from the sleep study that meet Medicare's coverage thresholds. Auditors do not take the diagnosis at face value. They look for the documentary chain that supports it, and if the chain breaks, the claim breaks.

Continuous use documentation

This is the pillar that fails most often on monthly rentals, particularly PAP. The 31-to-91 day compliance follow-up note has to be in the patient file. The compliance data from the device has to be captured and retrievable. Recertification at the appropriate intervals — month 13 for oxygen, others depending on the equipment — has to actually exist. When a billing system bills the next rental month automatically without anyone verifying continued-use documentation is in place, the operation accumulates exposure on every claim. The failures compound across long claim histories.

Order and authorization trail

The Detailed Written Order has to be present and dated correctly. I have lost count of how many denials I have reviewed where the DWO was dated after the date of delivery. That is a date-logic problem an auditor disallows without further analysis. The face-to-face encounter has to fall within the six-month window. Prior authorization, where required, has to be documented and tied to the claim. These are mechanical requirements. They reward discipline.

The error rate you carry today is the single biggest determinant of what a future demand letter will say. Most operations have never measured theirs. They estimate it, they hope it is fine, they assume their billing team has things in hand. Hope and assumption are not strategies that survive a UPIC review.

The fix is not complicated. Pull ten of your recent claims. Score them against the four pillars above. Be honest. If three of the ten have delivery documentation gaps, that is a 30 percent error rate in that pillar, and you can extrapolate the rest of the picture yourself. If you cannot tell whether they have gaps, that is a different signal — your documentation infrastructure is not producing the kind of clear trail an auditor needs to see, which means it is not producing the kind of trail you need either.

The letter arrives whenever it arrives. The documentation either holds, or it does not. There is no third option.

Ted Jones is CEO of BFLOW Solutions, a DME/HME workflow and revenue cycle platform serving providers nationwide. He currently conducts audit reviews for a national multiemployer benefit fund and has worked in healthcare contracting, managed care, and revenue cycle operations since 1993