Why the Same Procedure Pays Differently in an ASC

The procedure is identical. The code is identical. The payment is not, because site of service is an input to reimbursement rather than a detail about where the work happened.

What changes

The fee schedule. Facility and non-facility rates differ, reflecting who bears the cost of space, staff, and supplies.

The split. In a facility setting the professional and facility components are billed separately, frequently by different entities. Both must be right, and they must agree.

Coverage itself. Some procedures are only covered in specific settings. A procedure payable in an ASC may not be payable in an office, or the reverse.

Supplies and implants. Sometimes separately billable in a facility, sometimes bundled, depending on payer and item.

Where claims fail

• Place-of-service code inconsistent with where the procedure occurred.
• Non-facility rate billed for facility work, capping payment at the lower amount.
• Professional and facility claims that disagree on date, code, or patient details.
• Implants and high-cost supplies not billed where the contract allows them.

The coordination problem

When professional and facility claims are produced by different organizations, nobody owns the consistency between them. A mismatch denies one side while the other pays, and the denial looks like a coverage issue rather than a reconciliation failure.

Somebody has to reconcile the two claim sets. In most arrangements nobody has been asked to, which is why this category recurs.