Revenue leakage concentrates differently by specialty: implant invoicing in orthopaedics and cardiology, day-care sub-limits in oncology and ENT, recurring authorisation in dialysis and nephrology, package variance in maternity, and volume economics in ophthalmology. Auditing every department the same way finds the wrong thing in most of them.
The leak is not uniform
A hospital-wide leakage review that applies one method everywhere will find room-rent deductions and stop. That is the most common mechanism, but it is rarely the largest one in any given department.
| Department | Where the money usually goes | What to check first |
|---|---|---|
| Cardiology | Consumables and stent billing | Package versus component overlap |
| Orthopaedics | Implant invoicing | Is the invoice attached before send |
| Oncology | Day-care chemotherapy sub-limits | Sub-limit checked at admission |
| Nephrology | Recurring authorisation lapse | Sessions against approval balance |
| Maternity | Package against actual stay length | Length-of-stay variance |
| Ophthalmology | Cataract sub-limits at volume | Sub-limit per policy, not per case |
| ENT | Day-care coded as inpatient | Day-care list before admission |
| General surgery | Implants and consumables split | Non-payable list disclosure |
The implant invoice, which recurs everywhere
Orthopaedics, cardiology and general surgery share one mechanical failure: the implant is billed and the supplier invoice is not attached. Payers disallow consistently on this and they are entitled to.
It is entirely preventable at the point of send — a claim carrying an implant line and no invoice should not be submittable. This is the clearest case in the whole revenue chain where a block beats a reminder.
Recurring authorisation, which fails quietly
Dialysis and long-course oncology run on authorisations that cover a number of sessions. The failure mode is not rejection; it is the twelfth session against an eleven-session approval, treated and then unbillable.
Track sessions against approval balance rather than against date. A calendar reminder fires whether or not the patient attended; a balance counter only fires when it matters.
Day-care, and the 24-hour habit
Most policies list defined day-care procedures payable without a 24-hour admission. The habit of admitting for the clock persists anyway — it feels safer, and it costs a bed-day the payer will not fund.
The check belongs at booking, not at billing. Whether a specific procedure sits on the day-care list is a documentation question with a definite answer, and the list differs between policies.
Package variance in maternity
Maternity is priced as a package against a stay length nobody can predict. The package is not the problem; not tracking variance against it is. A hospital that knows its actual distribution of stay lengths can negotiate the package. One that does not is guessing, and usually guessing low.
How to audit by department
- Pull one month of settled claims per department, not hospital-wide.
- Classify each disallowed line by mechanism, and rank by exposure — amount multiplied by frequency.
- Expect the top mechanism to differ between departments. If it does not, the classification is too coarse.
- Fix at the cause, not the claim. Three claims sharing one contract row is one fix, not three.
More in this cluster: By specialty — every article we have on it.
By department
Where each of these plays out in practice: eye hospitals, orthopaedic centres, maternity hospitals, IVF and fertility centres, dental groups, dermatology and aesthetics, physiotherapy and diagnostic centres.
Questions we get asked
Which specialty leaks the most?
It varies by case mix, but implant-heavy departments — orthopaedics and cardiology — usually carry the largest absolute amounts because the individual line values are high.
Should we audit hospital-wide or by department?
By department. A hospital-wide audit finds room-rent deductions and stops, which is the most common mechanism but rarely the largest one in any given department.
What is the easiest specialty fix?
Blocking submission of an implant claim with no supplier invoice attached. It is mechanical, entirely preventable, and payers disallow on it consistently.
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