What dispute deadlines should providers track in Washington?

Accident Notice: Notice to insurer as soon as practicable following injury; Treatment Window: Medical expenses incurred within 3 years of the crash date (RCW 48.22.095); Insurer Communication Window: 10 working days to acknowledge claim under WAC 284-30-360. Verify the trigger date, current agency notices, and any extension before acting.

Which agencies administer these rules in Washington?

The guide identifies Washington State Office of the Insurance Commissioner (OIC). The correct agency depends on the plan and claim jurisdiction.

Auto Accident, PIP & Medical Billing State Guides

Washington Auto Accident, PIP & Medical Billing Laws

Washington operates an At-Fault automobile insurance framework under RCW 48.22.085 et seq., requiring insurers to offer Personal Injury Protection (PIP) with minimum medical limits of $10,000 unless rejected in writing. Unreasonable claim delays or denials expose insurers to the Insurance Fair Conduct Act (IFCA, RCW 48.30.015), and healthcare providers utilize statutory medical liens under RCW 60.44.

Accountability & Review

Reviewed by Millennova Legal Operational Integrity Team, Senior Audit and Arbitration Analysts

Last Reviewed

2026-03-01

Plain-language overview

Add-On PIP (Mandatory PIP Offering & Insurance Fair Conduct Act)

Washington follows a traditional tort liability system combined with mandatory first-party PIP benefit offerings. Auto insurers must offer policyholders at least $10,000 in PIP medical coverage (with options up to $35,000). If the policyholder does not reject coverage in writing, PIP pays reasonable and necessary medical expenses incurred within three years of the accident regardless of fault. Providers also protect claims against third-party liability proceeds using Washington's medical provider lien statutes under RCW 60.44.

PIP and MedPay coverage

Mandatory P I P Offering

$10,000 statutory minimum per person for reasonable and necessary medical and hospital expenses incurred within 3 years of the accident (RCW 48.22.095)

Expanded Coverage Options

Insurers must also offer policyholders an optional limit of at least $35,000 for medical expenses upon request (RCW 48.22.100)

Income And Services

Up to $200 per week for wage loss (up to $10,000 total) and up to $40 per day for essential replacement services (up to $5,000 total)

Assignment Of Benefits

Providers routinely bill auto insurers directly under written patient assignment agreements

Medical fee schedule and reimbursement rules

Name

Reasonable and Customary Fee Standard

Rules

Washington does not impose a mandatory fee schedule cap on automobile PIP medical payments. Reimbursement is based on reasonable charges customary in the medical community for similar treatments.

Cpt Basis

Standard CPT/HCPCS itemized coding on CMS-1500 or UB-04 billing claims

Preauthorization and utilization review

Requirement

Preauthorization is not required by statute for acute emergency services. Insurers may require treatment plans and clinical documentation for chiropractic regimens, extended physical therapy, or elective spinal procedures.

Independent Medical Examinations

Under standard policy provisions, insurers may request an independent medical examination (IME) or records review to evaluate whether continuing treatment remains medically necessary and related to the motor vehicle crash.

Appeals and dispute resolution

Insurance Fair Conduct Act

Under RCW 48.30.015 (IFCA), an insurer that unreasonably denies a claim for coverage or payment of benefits, or violates specific insurance regulations (WAC 284-30-330), may be sued for actual damages, potential treble damages, and mandatory attorney fees following a 20-day written notice to the insurer and the Insurance Commissioner.

Prompt Payment Rules

Under WAC 284-30-330 and WAC 284-30-360, insurers must acknowledge communications within 10 working days, commence investigation promptly, and complete claim determinations within 30 days of receiving proof of loss.

Medical Lien Statute

Under RCW 60.44.010 et seq., physicians, nurses, hospitals, and ambulance operators have a statutory lien upon personal injury tort claims. To perfect the lien, the provider must record a notice of lien with the county auditor within 20 days after cessation of treatment.

Claim and dispute deadlines

Deadlines can depend on the trigger event and may be affected by agency relief notices. Confirm the live rule before filing.

Event	Timeframe
Accident Notice	Notice to insurer as soon as practicable following injury
Treatment Window	Medical expenses incurred within 3 years of the crash date (RCW 48.22.095)
Insurer Communication Window	10 working days to acknowledge claim under WAC 284-30-360
Carrier Determination	30 calendar days from receipt of proof of loss
Medical Lien Recording	Within 20 days after cessation of service with county auditor (RCW 60.44.020)
IFCA Pre-Suit Notice	20 calendar days written notice before filing IFCA lawsuit (RCW 48.30.015)
Statute of Limitations	3 years from accident date for personal injury tort claims (RCW 4.16.080); 6 years for written contract actions

Documentation checklist

Washington PIP Application for Benefits
Executed Assignment of Benefits (AOB) and medical records release authorization
Itemized CMS-1500 or UB-04 billing form with CPT/HCPCS and ICD-10 diagnostic codes
Contemporaneous physician notes, emergency records, physical therapy notes, and diagnostic imaging findings
Recorded Notice of Medical Lien with county auditor stamp (for third-party liability lien claims under RCW 60.44)
Insurer Explanation of Benefits (EOB) or written claim denial notice

Responsible agencies

Washington State Office of the Insurance Commissioner (OIC)Statewide Regulation of Auto Insurers, IFCA Notices & Consumer Protection

Primary legal and regulatory sources

Revised Code of Washington Chapter 48.22 (Casualty Insurance - Personal Injury Protection)Washington State Legislature · 2024
Revised Code of Washington Section 48.30.015 (Insurance Fair Conduct Act)Washington State Legislature · 2024
Revised Code of Washington Chapter 60.44 (Lien of Doctors, Nurses, Hospitals, Ambulance Services)Washington State Legislature · 2024

This operational reference is educational, is not legal advice, and does not create an attorney-client relationship.

Common questions

What rules govern auto accident, pip & medical billing state guides in Washington?: Washington operates an At-Fault automobile insurance framework under RCW 48.22.085 et seq., requiring insurers to offer Personal Injury Protection (PIP) with minimum medical limits of $10,000 unless rejected in writing. Unreasonable claim delays or denials expose insurers to the Insurance Fair Conduct Act (IFCA, RCW 48.30.015), and healthcare providers utilize statutory medical liens under RCW 60.44.
What dispute deadlines should providers track in Washington?: Accident Notice: Notice to insurer as soon as practicable following injury; Treatment Window: Medical expenses incurred within 3 years of the crash date (RCW 48.22.095); Insurer Communication Window: 10 working days to acknowledge claim under WAC 284-30-360. Verify the trigger date, current agency notices, and any extension before acting.
Which agencies administer these rules in Washington?: The guide identifies Washington State Office of the Insurance Commissioner (OIC). The correct agency depends on the plan and claim jurisdiction.