What Happens to Your A/R When You Switch Billers

Switching billers is routine. The claims already in flight when you switch are not, and they are where transitions quietly lose money.

The gap nobody owns

Your outgoing biller has little incentive to work claims after notice. Their fee typically stops, their staff are reassigned, and the effort produces revenue for a relationship that is ending.

Your incoming biller did not submit those claims, does not know their history, and is usually compensated on what they bill going forward. Legacy A/R is somebody else's mess arriving without documentation.

So a book of receivables sits between two parties, both of whom have reason to treat it as the other's problem. Meanwhile filing and appeal windows keep running.

What to settle before notice

• Who works the tail, for how long, at what rate. Both contracts should say. Most say nothing.
• Data access. Claim-level history, not summary reports, and access continuing past the end date.
• Payer enrollment continuity. ERA and EFT routing changes are the classic cause of the post-transition payment gap.
• A cutoff rule. By date of service or by submission date — stated, so nothing falls between definitions.

Expect a dip

Even a clean transition produces a temporary drop in collections. Enrollment takes time, the new team is learning your payers, and the old queue is being worked by nobody for a period. Planning for it is the difference between a soft quarter and a crisis.

Legacy A/R is harder work than current claims and is usually priced separately for that reason. A vendor who quotes their standard rate on your aged book has either not looked at it or is not planning to work it.