When a short-notice cancellation is claimed (claim type CANC), the NDIA mandates a second field: "Cancellation Reason." Four reason codes are permissible: NSDH (health), NSDT (transport), NSDF (family), NSDO (other). EYC's iinsight system failed to enforce this second field, allowing CANC claims to be submitted without a reason code — causing systematic Bulk File rejections. The fix required the activity-to-code matrix to embed reason codes as mandatory per-scenario entries, not optional additions.

Cancellation claims require two fields in the Bulk File Upload, not one:

If the Cancellation Reason is absent when CANC is present, the NDIA rejects the claim. EYC's iinsight was generating CANC entries without enforcing the second field — a system architecture failure, not a coordinator error.

A provider can only claim under CANC when all of these conditions are met:

Providers may waive the cancellation fee at their discretion. The NDIA monitors cancellation claim volumes — an unusually high rate triggers scrutiny.

The notice period that triggers short-notice cancellation eligibility varies by support type:

The source specifically flags that "7 days" means calendar days, not business days — a source of sector confusion.

When a valid cancellation is claimed, the provider may claim up to 100% of the agreed fee. For Level 2 SC at EYC: 07_002_0106_8_3 at $100.14 with claim type CANC and the applicable reason code.