How to Switch Medical Billing Companies Without Disrupting Collections

To switch medical billing companies with less risk to collections, agree on who handles each claim, preserve access to the records and reconcile payments through the handoff. The transition needs to cover both new billing and old accounts receivable (AR)—the money still outstanding when the new team begins. A start date alone does not tell either team what it owns.

This checklist is for practice owners and administrators who have decided to change billing support. It applies across specialties, with extra attention to ongoing treatments, surgical follow-up, authorizations or other work that crosses the transition date.

What should be settled before the new team starts?

• The cutover rule: which encounters and claims belong to each billing team.

• Responsibility for old AR, denials, appeals, credit balances and patient statements.

• Access to the billing system, clearinghouse, payer portals and payment information.

• A baseline report showing open balances, unbilled visits and unresolved work.

• A named person at the practice who can resolve handoff questions.

These are Horizon’s operational recommendations. Your existing agreement and actual system setup determine which arrangements are available.

How do you choose a cutover date?

Start by checking the current billing agreement’s notice, transition and post-termination provisions. Confirm any obligations with the appropriate adviser when the wording is unclear.

Then choose a practical allocation rule. You might separate work by date of service or another explicitly agreed boundary. Whatever you use, document who handles charges entered late, corrected claims, reopened denials and payments received after the change.

For example, an October encounter billed in November should not become unassigned because one team sorts by visit date and the other sorts by submission date. Resolve that situation in the handoff plan before it occurs.

Who works the old AR?

Do not assume the incoming company automatically takes responsibility for every unpaid claim. Agree whether the outgoing team will finish its open work, the new team will take it over, or responsibilities will be divided.

For transferred balances, include claim identifiers, submission dates, payer responses, appeal deadlines, supporting documents and the last meaningful follow-up. A balance without its history can force the new team to repeat work or miss the next action.

Review aging by payer and claim status. Separate collectible follow-up from balances needing documentation, contractual review or an approved adjustment. Our guide to medical AR over 90 days explains how to focus attention on actionable accounts.

Do you have to change billing software?

A change of billing company does not automatically require a change of software. Horizon can work with your existing billing system. Confirm the access and reporting requirements before deciding that a migration is necessary.

Use properly authorized individual access where the systems support it. Test the incoming team’s access to claim history, attachments, remittances and reports before removing access needed to complete the handoff. Keep patient information within approved systems and transfer channels.

If enrollment, clearinghouse connections or payment routing must change, verify who owns each update and what confirmation is required. Avoid changing several payment connections without a record of what was changed.

How do you know the transition is working?

Capture baseline totals before the cutover: unbilled encounters, submitted claims, open AR, unposted remittances and unapplied payments. Reconcile those starting points with new activity so the team can explain where balances moved.

During the initial handoff, review claim acceptance, rejections, denials and payment posting frequently. Confirm that electronic remittance advice (ERA) files match recorded payments and bank deposits, and that patient balances do not generate duplicate statements.

Horizon’s sample billing reports show the kind of collection trends, underpayment comparisons and aging information that can help a practice ask better questions during the transition.

How Horizon Can Help With a Billing Company Transition

Before the handoff, Horizon can review your outstanding AR, identify the system and payer access needed, and help define who will follow each open claim and reconcile incoming payments. Our full-cycle medical billing service brings claim submission, denial follow-up, payment posting, patient statements and reporting into one coordinated process. We can work with your existing billing software, so changing billing support does not have to mean replacing your setup.

Call (408) 444-8845 or request a complimentary billing review to identify gaps in old AR ownership, system access and payment reconciliation before you switch.