A dropped claim is not an abstract bug. It is a clinician who saw a patient and did not get paid, or a patient who gets a surprise bill weeks later. So the bar for the claims pipeline is unusually high: every billable session must reach the payer exactly once — not zero times, not twice.
Idempotency as the foundation
The core move is making every step idempotent. Each session carries a stable key, and every stage of the pipeline — eligibility, coding, submission — can be retried safely because replaying a step with the same key is a no-op rather than a duplicate.
On top of that sits a durable retry queue. When a downstream payer system is slow or briefly unavailable, the work waits and retries instead of failing silently. The result is a pipeline that is boring in the best possible way: claims go in, claims come out, and nothing falls through the cracks.