Incident-To Billing: The Rules Everyone Half-Remembers

Incident-to billing lets services delivered by certain staff be billed under a physician's identifier at the physician rate. It is legitimate and widely used. It is also one of the most commonly misapplied rules in outpatient billing.

The conditions people forget

The problem must be established. A new problem does not qualify, even for an existing patient. A patient seen for a new complaint must be seen by the physician for that complaint before subsequent visits can be billed incident-to.

There must be a plan of care. Established by the physician, with the subsequent service following it.

Supervision must be present. Generally direct supervision — the physician in the office suite and immediately available. Not reachable by phone. Not in another building.

The supervising physician is who you bill under. Not necessarily the one who established the plan, if a different physician is the one present.

Why it goes wrong

The rules are learned once and applied by pattern afterwards. Staff know "established patient" and forget "established problem". Schedules change and the supervising physician is out without the billing changing to match. Nobody records who was present, so the requirement cannot be evidenced later.

What it costs when it is wrong

The difference between the physician rate and the correct rate, multiplied by every affected visit, recoverable on review. Because the error is systematic rather than occasional, the totals get large.

The control

Record the supervising physician per encounter, and flag new problems so they cannot be billed incident-to by default. Both are small changes that make the requirement evidenceable rather than assumed.