Washington State Medical Billing Laws: Surprise Bills and Collections

Washington State medical billing laws protect you on several fronts: surprise bills from out-of-network providers are capped at your in-network cost share, hospitals must screen you for charity care before collecting, medical debt cannot be sent to collections for 120 days or reported to credit bureaus for another 180, and interest on unpaid balances is capped at 9%. You also have appeal rights when an insurer denies coverage and a complaint route through the state Insurance Commissioner. Most of these protections apply automatically to people with commercial insurance regulated by the state; a few gaps exist for self-funded employer plans, which federal law fills in part.

Surprise and Balance Billing

Under the Balance Billing Protection Act (RCW 48.49), a provider cannot bill you for the difference between their full charge and what your insurance actually pays.¹ The protection matters most in two common situations: you go to an in-network hospital and get treated by an out-of-network doctor you didn’t choose (an anesthesiologist or radiologist, for example), or you receive emergency care from an out-of-network provider. In either case, your share is capped at what you’d owe for in-network care under your plan, and any overpayment must be refunded within 30 business days.²

The dispute over what the provider gets paid stays between the provider and the insurer. They negotiate within a timeframe set by the Insurance Commissioner, and if they can’t agree, either side can initiate binding arbitration.¹ You are not part of that fight.

When the State Law Does Not Cover You

The Balance Billing Protection Act applies to state-regulated commercial health plans. If your employer self-funds its health plan rather than buying insurance from a carrier, federal ERISA law generally preempts state insurance rules. Washington’s law only reaches self-funded plans if the employer voluntarily opts in.²

The federal No Surprises Act covers the same core situations — emergencies and out-of-network providers at in-network facilities — for people in self-funded plans nationwide.³ If you’re not sure which type of plan you have, your HR department or plan documents will say. The distinction determines whether you use state arbitration rights or the federal dispute process.

Charity Care and Hospital Financial Assistance

Every hospital in Washington must maintain a charity care and discount program, and it must screen you for eligibility before trying to collect or sending your account to a collection agency.⁴ Thresholds are tied to the federal poverty level, which for 2026 is $15,960 for a single person.

Larger hospitals — those in systems operating three or more acute care facilities, hospitals with over 300 beds in King County, or hospitals with over 200 beds in a border county of at least 450,000 residents — must offer:⁵

Full charity care for income up to 300% FPL (about $47,880 for one person)
A 75% discount for income between 301% and 350% FPL
A 50% discount for income between 351% and 400% FPL (about $63,840 for one person)

Smaller hospitals must still provide charity care, but at lower income cutoffs:⁵

Full charity care for income up to 200% FPL (about $31,920 for one person)
A 75% discount for income between 201% and 250% FPL
A 50% discount for income between 251% and 300% FPL

Hospitals must post notice of charity care availability and help you apply at admission or before discharge. While your application is pending, the hospital cannot send your account to collections or take legal action.⁴ Ask the hospital’s financial counselor about charity care before paying any large bill. People routinely pay in full or let bills go to collections without ever being told they qualified.

Facility Fees and Itemized Bills

Some outpatient clinics are licensed as part of a hospital, which means a visit can generate two bills: one from the physician and a separate “facility fee” from the hospital. Washington requires these provider-based clinics to notify you before non-emergency services that a facility fee may apply and that it may raise your out-of-pocket cost. Hospitals must also post this information in visible locations and on their websites.⁶

Starting in 2025, the initial billing statement for any charge that includes a facility fee must also include written notice of your right to request a reduction, along with a phone number to call.⁷

You can also request an itemized statement from any hospital or healthcare facility listing each service, supply, and procedure with its charge. Compare that document to your insurance explanation of benefits to catch duplicate charges or services you never received.

Good Faith Estimates if You Are Uninsured or Paying Cash

If you don’t have insurance, or you’re choosing not to use it for a scheduled service, the federal No Surprises Act entitles you to a good faith estimate of the cost. If you schedule at least 10 business days out, the estimate must arrive within 3 business days; if you schedule 3 to 9 business days out, it must arrive within 1 business day.⁸

The estimate should cover the primary service plus related items like anesthesia and facility charges. If the final bill exceeds the estimate by $400 or more, you can challenge the charges through a free federal patient-provider dispute resolution process administered by HHS.⁸ The good faith estimate requirement currently applies only to uninsured and self-pay patients, not to claims filed through insurance.

How Long Before Medical Debt Can Go to Collections

A provider or facility cannot sell or assign your medical debt to a collection agency until at least 120 days after your initial billing statement was sent.⁹ Use that window to apply for charity care, arrange a payment plan, or push your insurer on a coverage dispute.

Once a collection agency takes over, it must send you written notice within five business days of its first collection attempt. That notice has to name the collection agency and the original creditor, state the amount owed, and tell you that you have 30 days to dispute the debt in writing.¹⁰ If you dispute it in writing within that window, the agency must verify the debt before continuing.

The collection agency then has to wait another 180 days after receiving the debt before it can report it to a credit bureau.¹¹ Combined with the 120-day assignment delay, you have roughly ten months from your first bill before medical debt can appear on your credit report. Use that time. Removing medical debt from a credit file after it lands there is much harder than keeping it off in the first place.

Interest Cap on Medical Debt

Prejudgment interest on medical debt in Washington is capped at 9% per year under RCW 19.52.020(4), lower than the 12% general prejudgment rate on other consumer debts.¹² The 9% cap covers all medical debt as defined under RCW 19.16.100, including debt that was already accruing interest before the law took effect in July 2019. Prejudgment interest is what runs from the time the debt is owed until a court enters judgment, which is the period during which most medical debts get negotiated or settled.

Appealing a Denied Claim

If your insurer denies coverage for a service, you have the right to an internal appeal followed by an independent external review. External review is available whenever the denial involves a medical judgment disagreement, a determination that a treatment is experimental, or a claim that you provided false information on your application.¹³

You have four months from the date of a final denial to file a written request for external review, and you can appoint someone to file on your behalf, often your treating physician. Under the HHS-administered federal process the review costs nothing; where a contracted independent review organization is used, the fee is capped at $25.¹³ The reviewer’s decision binds the insurer, which makes external review one of the strongest tools you have when a legitimate claim is denied.

Filing a Complaint With the Insurance Commissioner

If a provider has balance billed you illegally, or an insurer has mishandled your claim, the Washington Office of the Insurance Commissioner investigates complaints. File online through the OIC’s complaint portal or call the consumer advocacy line at 800-562-6900 during business hours. The OIC forwards your complaint to the provider or insurer and requires a response, and refers matters outside its jurisdiction to the right agency.¹⁴ Filing takes a few minutes and creates a paper trail that helps if the dispute escalates.

1
Washington State Legislature. RCW 48.49 – Balance Billing Protection Act
2
Washington State Legislature. RCW 48.49.030 – Enrollee Liability for Out-of-Network Services
3
Washington State Legislature. Washington Code 48.49.020 – Balance Billing When Prohibited
4
Washington State Legislature. RCW 70.170.060 – Charity Care Prohibited and Required Hospital Practices and Policies
5
Washington State Legislature. Washington Code 70.170.060 – Charity Care
6
Washington State Legislature. RCW 70.01.040 – Provider-Based Clinics That Charge a Facility Fee
7
Washington State Legislature. House Bill 2378
8
Centers for Medicare & Medicaid Services. No Surprises: Whats a Good Faith Estimate
9
Washington State Legislature. RCW 70.54.470 – Medical Debt
10
Washington State Legislature. RCW 19.16 – Collection Agencies
11
Washington State Legislature. SB 5480 – Senate Bill Report
12
Washington State Legislature. RCW 19.52.020 – Rate of Interest
13
HealthCare.gov. External Review
14
Office of the Insurance Commissioner. Complaints