Variable: NM1_QUALIFIERS

const NM1_QUALIFIERS: Readonly<{ BILLING_PROVIDER: "85"; PATIENT: "QC"; PAY_TO_ADDRESS: "87"; PAY_TO_PLAN: "PE"; PAYER: "PR"; RECEIVER: "40"; SUBMITTER: "41"; SUBSCRIBER: "IL"; }>

NM1-01 entity-identifier codes used by the 837 walker to route an NM1 onto the right entity slot. Curated to the qualifiers the v1 walker recognizes; an NM1 with a qualifier outside this set falls into the Loop 2310x / 2420x line-provider verbatim bucket. Frozen for type safety + IntelliSense - consumers should rarely need these (they're a walker-internal vocabulary), but they're exported for tests + the Phase 8 builder API.

Example

NM1_QUALIFIERS.BILLING_PROVIDER → "85".