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Switching billing vendors without losing a dollar of revenue

A practitioner guide to vendor migration: how to scope a parallel run, what to put in writing about A/R handover, and the seven things that go wrong if you skip the audit.

  • KMKarina Martinez, CRCR · Reviewed by Mark Chen, JD
  • 14 min read
  • Published March 30, 2026

The lede

Switching a billing vendor is the most common moment a practice loses 30 to 90 days of revenue. It is also entirely avoidable.

This piece is the playbook our migration team runs, written for CFOs and practice leads weighing a vendor change, with the contract terms, audit checklist, and parallel-run cadence we use on every onboarding.

What this piece covers

  • How to scope a 60-day parallel run that protects cash flow.
  • A/R handover terms to put in writing before signing.
  • The seven failure modes that happen if you skip the audit.
  • A timeline template the CFO can present to the board.

In editorial review

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