The gap between two jobs: how Bill-Back came to be

A few months ago, a close friend introduced me to the world of ambulatory surgery centers. I didn’t know much about ASCs at the time. I knew even less about implant billing. But I knew reconciliation problems from my previous work in finance, at a multinational HR tech company in Granada, Spain.

Every month, the same fight: payables didn’t match what we expected on the receivable side. Not because anyone was doing anything wrong, but because two teams were each doing their own job correctly, and the space between them belonged to neither. Operations sold our consultants to our clients. Our clients paid us for our consultants’ time. My job was to sit in that space and find the mismatch before it became a real problem. One month I miscalculated an entire team’s revenue and closed the books six figures below where they should have been. I thought they would fire me. They didn’t.

When I started researching how ASCs get paid for the implants they use in surgery, I recognised the shape of it immediately. Same problem. Different industry. And once I started digging, I realised this isn’t a rare edge case. It’s structural, and it’s costing surgery centers real money every month.

This isn’t a failure of attention. It’s a gap between two jobs.

Here’s how it plays out inside a surgery center.

A nurse notes an implant during a case. Materials and AP confirm the vendor invoice arrived and pay it. Billing codes the case from the charge sheet and submits the claim. Three teams, three separate confirmations. Materials confirms the invoice is correct. Billing confirms the claim went out. Neither one confirms that the two match.

That’s the gap. Nobody is negligent and nobody is asleep at the wheel. The check simply falls outside all three job descriptions — and done by hand, case by case, it is extremely time consuming.

It gets worse once you look at where the price actually comes from. Practice management systems typically auto-populate the implant charge from the center’s own item master, an internal price list, rather than from the vendor’s actual invoice. So even a center charting and billing in a single unified system — SIS, HST, and the rest — is pricing implants off an internal number that may not reflect what the vendor billed.

The nurse’s supply note says one thing. The vendor invoice, which arrives weeks later under its own catalog number, says another. Unless a person sits down and compares the two line by line, the mismatch doesn’t surface. The implant goes unbilled, or is coded as bundled with the procedure when the contract allowed it separately, or is reimbursed at an outdated rate.

Multiply that across every implant case, every month, and the size of the question becomes clear.

What this actually costs ASCs

The industry doesn’t talk about this loudly, because it doesn’t look like a crisis. It looks like a rounding error, repeated indefinitely. But the numbers tell a different story.

Sean Gipson, CEO of Remedy Surgery Center, put it plainly in a recent Becker’s ASC Review roundup: most ASCs don’t have a volume problem, they have a collection problem. The revenue is earned in the OR and then leaks out afterwards, a few percentage points at a time, through denials, unchallenged underpayments, AR delays, and charges that never reached a claim. Individually these seem manageable.

On the implant side specifically, ASC billing analysts put a dollar range on unbilled and underbilled implant charges alone at a busy multi-OR center, depending on case volume and procedure mix.

Worth being explicit about that second figure: it is vendor-sourced, and so is this site. But it lines up with the mechanism Becker’s is describing, and both point the same direction — implant charge capture is one of the largest and most persistent leaks in an ASC revenue cycle, and it stays invisible until someone goes looking for it.

Our own working band is deliberately more conservative than either, and every figure below is computed by the same module that drives the calculator on the homepage.

• 100 implant cases/mo$88K–$227K
• 150 implant cases/mo$132K–$340K
• 200 implant cases/mo$176K–$454K

Annualised from the same working band: 7–9% of implant cases at $1,500–$3,000 per corrected claim, assuming 70% of those claims get paid. The solid bar is the low end of each range. This is an estimate for sizing the question, not a projection of money owed — a match is a ceiling until someone confirms the line was never billed.

It stays invisible because of how the work is measured. Billing is judged on how fast claims move and how clean they are, not on whether every purchased implant reached a claim in the first place. An RCM partner is judged on denial rates and days in AR, both of which only start counting once a claim exists. An implant that was invoiced by the vendor but never reached a claim at all doesn’t show up in either metric. It isn’t a denial and it isn’t aging AR. It is simply gone, quietly, before it ever entered the system that would have caught it.

That is what makes this different from most billing problems that already have tools pointed at them. Denial management software watches claims after they’re submitted. Charge capture audits typically work off the center’s own item master — the same internal list that produced the mismatch. Comparing the vendor’s actual invoice, the ground truth of what was purchased, against what reached the payer rarely sits inside any of those workflows.

The reconciliation itself is not a novel idea, and I want to be careful not to claim it is. Specialised ASC billing firms market manual versions of it. What keeps it from happening every month is the cost of doing it by hand.

Not being close to the problem helped

I want to be clear. I didn’t spot this because I understand ASC operations better than the people running them. I don’t. Not even close. Administrators, directors and billers who work in this industry every day understand the operational reality far better than I ever will.

What I brought wasn’t healthcare expertise. It was a specific instinct, built over years of reconciliation work: distrust of any process where two records are supposed to match and no step is assigned to check that they do. In global finance we called that an open item. You don’t assume it nets out on its own. You go find it, prove where the money actually went, and close it.

ASCs have exactly this kind of open item, sitting between materials, AP and billing. It just hasn’t been named that way, because the people closest to it are focused on running a surgery center, not auditing invoice reconciliation for its own sake. That’s not a knock on anyone. It’s an artifact of how the workflow evolved: three functions each doing their part correctly, with the seam between them falling outside all three.

What Bill-Back actually does about it

Bill-Back reads two files an ASC already has: the monthly case log export from the practice management system, and the vendor invoice PDFs. Stryker and Arthrex are parsed automatically today; other major vendors are supported through manual review while automated coverage expands.

It matches the nurse’s supply note from every case against the implant on the vendor’s invoice, and prices it at the center’s contracted rate rather than the internal item master.

Then comes the step that decides everything. The center’s own team clears anything already on a claim, one tap per line. A match is a ceiling, not money owed, and that pass is what separates the two. What survives it is what never reached a payer — and each of those becomes a payer-ready Recoup Packet: the matched invoice line, the contract math, and the appeal letter, ready for the center’s existing biller or RCM partner to submit.

That last part matters. Bill-Back isn’t trying to replace a center’s billing team or RCM company. Those teams are doing their job well, within the boundaries of what they are measured on. Bill-Back works the seam those metrics don’t cover. It hands the existing team something they can act on the same day.

Every match carries a confidence score, and anything below 98% goes to a human review queue rather than being submitted on a guess. On patient data there are two layers: structured identifiers — names, SSNs, full dates of birth, MRNs — are stripped in the browser before a file uploads, so they are never transmitted; and because clinical free text can still carry an incidental identifier, everything received is treated as PHI and handled under a signed BAA.

And because this is revenue a center already earned rather than new revenue extracted from somewhere else, the audit is free. Bill-Back is paid a flat contingency fee on recoveries, and only after the payer’s payment is confirmed. If the audit finds nothing, the center owes nothing. If the payer never pays, the center owes nothing.

Where this goes from here

I’m early in this ASC world, and I’d rather say that plainly than dress it up. What I have is a problem I’m confident is real, seen clearly enough from the outside to build a tool for it, and a standing interest in being corrected by the people who run these centers.

If you run billing, materials or operations at an ASC and any part of this sounds familiar, I’d genuinely like to hear how it shows up at your center. Pull your last 10 implant invoices and compare them against what you actually billed. If they match, that’s good to know. If they don’t, you’ve just found where some of your margin has been going.

That gap between two jobs is what Bill-Back exists to close. You can size it at your own case volume in about thirty seconds, or start a free audit against a month of your own files.

Sources

Trade press

• “The financial mistakes crushing ASC profits”, Becker’s ASC Review, April 28 2026, quoting Sean Gipson, CEO of Remedy Surgery Center.

Vendor-sourced, flagged in-line where cited above

• “Is Your ASC Billing Partner Helping Your Surgery Center Grow?”, Medical Billers and Coders, July 19 2026. A billing services vendor’s industry analysis, cited as a directional estimate.