The bill left the hospital. The help didn't.

First: whose debt is it?

Most hospital "collections" is placement, not sale: the hospital still owns the bill and an agency works it for a fee. That matters — the hospital can pull the account back when an application lands, and the agency cannot override the hospital's assistance decision. Ask the agency, in writing if you can: "Is this debt owned by the hospital or was it sold?" If it was sold, the buyer steps into a harder position and the hospital route narrows — the error-dispute and negotiation doors matter more.

The doors that stay open

• A late application. The federal 240 days is the period the hospital must accept applications. Many hospital policies accept them later, and a hospital that wants its tax exemption intact has reasons to. Apply anyway, in writing, and keep the proof.
• Screening states. Where state law requires presumptive screening (CA from 2027, DE, IL, MD, NC, OR and others), eligibility found by screening is not bound by the application clock in the same way — and Oregon requires screening before collections placement. If nobody screened you, say so.
• The application pauses the machine. While a complete FAP application is being decided, extraordinary collection actions must stop. A pending application also gives the collector a documented reason to hold the account.
• Errors never expire quietly. A charge for a service you never received is disputable whenever you find it. Request the itemized bill and work door two in parallel.
• Credit-reporting protections. Fifteen states plus DC now bar or limit medical debt on credit reports; federal bureau practice keeps paid medical collections and collections under $500 off, with a 1-year wait before any medical collection can appear. Your state page carries your rule.

The collector's own rules, briefly

Third-party collectors (not the hospital's own billing office) work under the Fair Debt Collection Practices Act: you can demand validation of the debt, dispute it in writing within 30 days of their first letter to force verification before further collection, and require them to stop calling. None of that resolves the underlying bill — it buys order and time while the hospital-side doors above do the real work. Never let a collector talk you into a payment plan that undercuts a pending assistance application; hospitals, not agencies, decide eligibility.