The sessions your billing system has never heard of
The session happened. The tech was there, the client was there, the hour was worked. Payroll already paid for it.
Three weeks later there is still no billing entry, because the note was never signed. Nobody is looking for it. Nothing is flagged. The schedule says complete.
The only leak with no footprint
Every other stage on the Leak Map leaves a mark somewhere.
A cancellation shows up in the schedule. A denial shows up in A/R. A short payment shows up in the remittance. Somebody, eventually, runs a report and sees it.
An unconverted session shows up nowhere.
It is not in A/R, because A/R starts with a claim and no claim exists. It is not in your cancellation report, because the session was delivered. It is not in your collections rate, because a collections rate only measures what you billed. You can have a clean 97 percent collection rate and a month of unconverted sessions sitting behind it, and the two numbers will never meet.
It is in payroll. That is the only place it lands.
Where it actually stalls
Conversion is not one step. It is a short chain, and every link in it is a person.
The session gets held open. The note gets written but not signed. The note gets signed but the supervision signature is missing. The code does not match the authorization, so conversion errors out and the error sits in a queue nobody owns.
None of these are billing failures. By the time billing could act, the entry would already exist. This is the stage where the clinical side of the house and the revenue side of the house stop touching, and in most practices nobody has been given the job of standing in the gap.
What the arithmetic looks like
Same illustrative practice as the earlier chapters. Forty active clients, 600 delivered hours a week, a blended rate of $75.
Illustrative arithmetic, not a client engagement.
Two different problems are sitting in that block and they need different fixes.
The delay, and the disappearance
The 111 late-converted hours are not lost. They are slow. That is a working capital problem, and it is measurable as one.
Carry a 12-day average conversion lag against a 2-day target and you are holding 10 extra days of delivered work in a pre-billing state at all times. Two working weeks. On $45,000 a week, that is a standing $90,000 of work you have paid for and not yet asked anyone to pay you for.
The 9 never-converted hours are gone. Nine hours a week at $75 is $675, and across 48 weeks, $32,400 a year of clinical work delivered at full cost with no revenue attached to it. That figure appears in no report, which is why it survives year after year.
The timely filing clock started without you
This is the part that turns a delay into a write-off.
The filing window runs from date of service. Not from conversion, not from submission. Every day a session sits unconverted is a day spent.
A 12-day conversion lag followed by a 9-day biller lag — stage 04, and its own conversation — means 21 days of the window are gone before the claim leaves the building. Against a 90-day payer that leaves 69 days for a denial and a rework, which is survivable. Against a 60-day payer you have spent a third of the window on internal handoffs, and anything that sits in your 31-plus-day bucket is already at real risk.
The sessions most likely to be late-converted are the ones with a note problem. The ones with a note problem are the ones most likely to deny. Late and fragile is a bad pair to run at a short window.
Your monthly numbers are wrong in both directions
If the work only counts as revenue once somebody converts it, your month follows the backlog instead of the business.
A strong month with a slow conversion week reads soft. The next month catches the spillover and reads strong. You had a good month and the report told you otherwise, and every call you make off those numbers — which clients are profitable, which location is carrying its cost, whether you can afford the next hire — inherits the error.
Counting the revenue on the date the session happened fixes the reporting. It does not fix the cash, and it does not fix the filing clock. It does mean the backlog is a number you can watch all month instead of a surprise at close.
Five checks you can run this week
You do not need anybody's help for these. One closed month is enough.
1. Pull every completed appointment with no billing entry. Not a count — a dollar value and an age, by date of service.
2. Bucket it. 0 to 2 days, 3 to 7, 8 to 30, 31 and over. The 31-plus bucket is today's work, not this quarter's project.
3. Sort that bucket by payer filing window, shortest first. That is your work order. Some of those hours have days left, not weeks.
4. Rank unconverted hours by clinician. It concentrates in three or four people almost every time, and it is almost always a notes problem rather than a billing problem. Treat it that way.
5. Reconcile one closed month. Delivered hours off the schedule against converted hours out of billing. The difference is your never-converted number. Most practices have never produced it once.
Check five is the one that tells you whether this is a cash timing issue or an annual write-off.
The number to actually track
Completed and unconverted, aged by day, with a target of 1 to 2 days. Run it weekly, in dollars.
Pair it with conversion completeness once a month — converted hours divided by delivered hours, target 100 percent. Anything under is not late, it is gone.
Aging alone will make you feel better than you should, because a backlog that is being worked and a backlog that is being abandoned age exactly the same way.
Where this sits
This is the third of seven stages where ABA revenue leaves, and the last one that is entirely inside your building. Everything upstream is about whether the session should have happened. Everything downstream involves a payer.
Stages 01 through 03 are the three most practices never measure, and together they usually hold more money than the claims work everybody focuses on.
A Leak Map Assessment measures all seven — reservoir, cancellations, session conversion, biller lag, clean claims, rate integrity and recoupments. A claims audit is a different instrument. It starts at stage four, after a session has been converted and billed, and reconciles the back half of the cycle to cash.
An unconverted session is invisible to a claims audit, because there is no claim to audit.
Aimline closes the books, oversees the revenue cycle, and sits in the CFO seat for ABA practices. We run claims audits scoped to a payer book, and Leak Map Assessments that measure the full cycle — three weeks, $7,500 fixed. Either one gives us a verified number to run oversight against, and the report is yours whether or not you engage us to fix what it finds.
