Service record rejected by the payer: the four most common reasons

Across operators the causes are remarkably stable. Practically every rejection falls into one of four groups:

1. Formal reasons. Licence, Institutionskennzeichen or contract status do not match the day of travel.
2. Evidence reasons. There is nothing to prove that the journey was actually delivered as billed.
3. Allocation reasons. Passenger, approval and journey cannot be linked unambiguously.
4. Cancellation reasons. A cancelled journey was billed as payable even though the notice period agreed in the contract had been observed.

The order reflects the sequence in which a claim is checked, not how often each group occurs. A payer looks at entitlement first. Only after that does anyone look at the individual journey. The first three groups arise in operations, the fourth in scheduling.

An operator who collects schoolchildren in the morning, drives sheltered workshop employees before lunch and takes on a dialysis journey in the afternoon is working against three separate legal regimes in a single day. The prices differ, which is well known. What matters more is that in each regime a different document carries the service.

There is no nationwide rule for school transport. It is a matter for the federal states and is fleshed out by state regulations and by the bylaws of districts and independent cities. In North Rhine-Westphalia, the Schülerfahrkostenverordnung (the state regulation on school travel costs) makes the Schulträger of the school attended responsible for covering travel costs on application and for deciding on the most economical mode of transport. The state school ministry makes clear that the Schulträger has an obligation to bear the costs and no obligation to provide transport. What your record has to contain is therefore set out in the specification of your tender and in no piece of legislation. We pick this up on our page for school authorities as well.

In integration assistance, transport services under Section 83 SGB IX are only to be provided where using public transport cannot reasonably be expected of the beneficiary given the nature and severity of their disability. Under Section 128 SGB IX the responsible body may review economy and quality as soon as there are factual indications of a breach of duty. Paragraph 2 expressly permits such a review without prior notice, and the provider has to produce the necessary documents and give information on request. A body of evidence that only comes together at the end of the month is of little help on a Tuesday morning in May.

With Krankenfahrten the medical prescription carries the journey. Under Section 60 SGB V the insurer covers travel costs only where they are necessary for compelling medical reasons, and journeys to outpatient treatment generally require prior approval. Approval is deemed granted in cases including a severe disability pass carrying the markers aG, Bl or H, and care levels 4 or 5. At care level 3 a lasting mobility impairment is an additional condition. The GKV-Spitzenverband (the national association of statutory health insurers) calls this a deemed approval. It does not apply to the ambulance-style Krankentransportwagen, where prior approval remains mandatory. We have broken the details down in a separate article on approval of medical transport and care levels.

Formal rejections are the most galling kind. The journey was faultless, the driver on time, the passenger satisfied. What gets checked at this point is nevertheless only the entitlement to bill at all.

To bill the statutory health insurers, every provider needs an Institutionskennzeichen, a nine-digit sequence issued and maintained by ARGE·IK at the DGUV. The legal basis for these nationwide identifiers is Section 293 SGB V. A further IK becomes due as soon as there are separate sites or separate supply contracts. The AOK puts it unambiguously to its contract partners: every provider must have an Institutionskennzeichen for each place of business. An operator who opens a second site in March and keeps billing under the old IK in April produces rejections that have nothing to do with the transport delivered.

The IK on its own is not enough. Krankenfahrten additionally require a valid contract with the insurer in question, or accession to the relevant agreement. Under Section 133 SGB V it is the health insurers or their regional associations that conclude these contracts, and the agreed prices are maximum prices. Negotiation happens regionally, which is why rate versions change on different dates in each federal state. In Baden-Württemberg the framework agreement for taxis and hire cars has applied since 1 April 2025, while the associated price agreement only took effect on 1 January 2026. In Saxony the annexes for taxis and hire cars were revised with effect from 1 April 2026 (as at July 2026).

Before the first line of an invoice, the following therefore has to match the day of travel:

• A valid licence under passenger transport law and the vehicle documentation required by the contract.
• An Institutionskennzeichen belonging to the place of business that is actually billing.
• The rate version in force on the day of travel, not the one from the previous month.
• The agreed billing channel. Providers in this category transmit their billing data electronically under Section 302 SGB V, with the prepared source documents going to the insurer as well.

Once the formal hurdle is cleared, the case worker checks whether the service billed is evidenced the way it appears on the invoice. This is where the majority of rejections arise, and almost all of them from the same handful of constellations.

• No confirmation that the service was delivered. There is nothing to show that pick-up and arrival took place. On journeys to institutions this is typically the countersignature by the workshop or the school.
• The prescription or approval does not cover the journey. The period has expired, the approved number of journeys has been exceeded, or the destination differs from the approved place of treatment or institution. Under Section 2 paragraph 2 of the G-BA medical transport directive the prescription should be issued before the journey; a journey can only be prescribed retrospectively in exceptional cases, particularly emergencies.
• The route is not plausible. Framework agreements regularly refer to the shortest route, as does the agreement in Baden-Württemberg. If a tour bundles four passengers, the arithmetic produces a detour that only documentation of the actual route driven can explain.
• The allocation is not unambiguous. Two passengers with similar surnames, a change of payer at the turn of the month, an escort travelling along without an approval of their own. Any of these details topples an otherwise correct line item.

The last point deserves particular attention, because it can almost never be cleared up after the fact. Whether an escort is paid for is handled differently by every payer, and the question has to be answered before the journey. We have taken this apart in a separate article on escorts in school transport.

There is no nationwide rule for cancelled journeys. Section 60 SGB V governs the assumption of travel costs, not the remuneration of journeys that did not happen. Whether and from what point a cancellation is payable follows solely from the relevant contract or tender specification. Between a district council, a social welfare office and a health insurer these provisions diverge considerably.

In practice you meet three basic patterns, and you need to know them separately for each client:

• No cancellation fee. Every cancellation is without consequence, whenever it comes.
• A notice period in hours before the scheduled pick-up. The assessment depends on the gap between the cancellation and the scheduled pick-up time.
• A fixed time of day. Cancellations up to a set time on the previous day or on the day of travel are free, later ones are payable.

All three models are only as robust as the documentation of when the cancellation came in. If the mother of a pupil rings the work mobile of the scheduler at 6:40 and nobody records it, that call is no argument in a dispute. Recording who cancelled as well, meaning the passenger or their family on the one hand and the institution on the other, lets you address no-shows where they arise. Otherwise they drift indiscriminately into the monthly invoice, which is exactly where they get noticed.

The visible damage is the reduced line item. The bigger one is the delay. A rejection reaches the operator weeks after the day of travel, is researched internally, corrected, resubmitted and checked again, while wages, lease instalments and fuel have long since been paid. Passenger transport operators work with a high share of staff costs and a thin margin. Deferred incoming payments hit liquidity immediately.

On top of that comes the research effort. Without robust daily documentation, rework means reconciling tour plans with duty rosters, questioning drivers four weeks after the fact and phoning the workshop to establish whether the passenger was even there that Tuesday. The effort per line item regularly exceeds the revenue of the individual journey by a wide margin. It also falls on commercial management, which is where the most expensive working hour sits.

The third effect cannot be quantified. Repeated complaints change how a client looks at your invoices. Check rates rise, queries get more detailed, and at the next tender the case worker in the school administration office remembers precisely that experience. In integration assistance this can build up to an unannounced review under Section 128 SGB IX.

All the causes named so far share one property. On the day of travel they are settled in two minutes, four weeks later hardly at all. That is where the leverage lies. An operator who produces the record as a by-product of the day of travel has nothing left to capture at the end of the month and only something to check.

1. 1Before the journey: check entitlementIs there a valid prescription or approval notice, does the period cover the day of travel, is the correct Institutionskennzeichen on file and is the rate version in force on the day of travel applied?
2. 2During the journey: confirm deliveryDeparture and arrival are confirmed immediately, by the driver in the vehicle and, on journeys to institutions, countersigned by the school or workshop. Kilometres and times come from operations, and the planned value stays out of it.
3. 3On a cancellation: record the timeEvery cancellation is captured with a timestamp, along with who cancelled. Only from that can you tell whether the notice period agreed in the contract was observed.
4. 4At the end of the month: look only at deviationsThe close consists of a deviation list with journeys lacking confirmation, journeys outside the approval period and cancellations close to the deadline. Everything else goes through unchecked.

This is exactly where scheduling software comes in. It links approval, rate version and journey at the planning stage and lets delivery be confirmed through a driver app in the vehicle, so the record comes into being during operations rather than as a separate task at the end of the month. The Vermo overview shows how this looks with us.

The following points can be worked through one after another without a project. In this order they address the four groups of causes from the start of the article.

• For each place of business the matching Institutionskennzeichen is on file and is pulled automatically during billing.
• Rate versions are maintained with validity dates, so that a mid-month effective date splits the billing month correctly.
• Every passenger has an approval or prescription on file with a validity period and an approved number of journeys.
• For each client the cancellation model is recorded, meaning no notice period, hours before pick-up or a fixed time of day.
• Every journey carried out carries a confirmation from operations, plus the countersignature on journeys to institutions.
• Deviations between the planned and the driven route are documented and can be justified.
• The monthly close starts with a deviation list instead of a data entry session.
• Rejections are recorded with their cause group, so it becomes visible which group accounts for the largest share.

The last point decides whether the list turns into an improvement. Without figures, every measure stays an assertion. Three are enough. The rejection rate per payer, the average time from the day of travel to payment received, and the share of journeys whose record was already complete on the day of travel. When the third figure rises, the first two follow, usually with one billing cycle of delay.