Modernizing and clarifying timely payment requirements for health carriers.
SB 5845 requires health insurance carriers in Washington to pay or deny complete claims from healthcare providers within 30 days of receiving them. If a claim is incomplete, carriers must send a written notice within 14 days specifying missing information or denial reasons. Carriers that miss deadlines must pay interest (1% for first 60 days, 1.5% thereafter) on unpaid claims, which cannot be applied to patient deductibles. The law applies to all health plans filed or renewed after January 1, 2027, and includes penalties for claims unresolved over 90 days. It directly affects insurance companies and healthcare providers by clarifying payment timelines and adding financial consequences for delays.
Bill status
signed
all 5 stages cleared
Introduction
Dec 2025
Committee Review
Mar 2026
Senate Passage
Mar 2026
House Passage
Mar 2026
Signed into Law
Mar 2026
Introduced Dec 8, 2025
Signed Mar 23, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
Engrossed Substitute Bill
→
Substitute Passed Legislature
·
5 edits
MODERATE
This bill updates Washington state laws to improve timely payment for health care providers and clarify rules for refunding overpayments. It adds protections for Indian health care providers, adjusts deadlines for carriers to request refunds, and refines the criteria for administrative penalties.
Scope change
The bill expands the scope of protected providers to include Indian health care providers, even those not under contract with a carrier, and clarifies that the refund rules apply to all health plans subject to state regulation.
ELIGIBILITY
Added Indian health care providers to the list of entities protected by timely payment requirements, regardless of whether they have a contract with the health carrier.
REQUIREMENT
Changed the deadline for carriers to request a refund from a provider from 24 months to 12 months (or 6 months for mental health/substance use services), and from 30 months to 18 months for coordination of benefits cases.
Clarified that the refund rules prevail over conflicting contract terms between carriers and providers.
ENFORCEMENT
Updated the language regarding administrative penalties to clarify that the commissioner must consider a 'pattern of violations' when determining appropriateness.
TIMELINE
Added a new section establishing that the refund rules will take effect on January 1, 2028.
Floor votes · Senate Feb 11, 2026 · House Mar 5, 2026
How they voted
50–0
Passed · 1 other
Total votes 51
Feb 11, 2026
D
Democratic31
96% Yea
R
Republican20
100% Yea
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
34
Key actions
17
Committee
12
Mar 23, 2026
Signed into law
Governor signed.
executive
Mar 11, 2026
Lower · Passed
Speaker signed.
lower
Mar 10, 2026
Upper · Passed
President signed.
upper
Mar 9, 2026
Upper · Passed
Passed final passage; yeas, 49; nays, 0; absent, 0; excused, 0.
upper
Mar 9, 2026
Upper · Passed
Senate concurred in House amendments.
upper
Mar 5, 2026
Lower · Passed
Committee amendment(s) adopted as amended.
lower
Mar 5, 2026
House · Passed
House Vote: pass (96-0-4)
house
Mar 2, 2026
Committee
Referred to Rules 2 Review.
lower
Mar 2, 2026
Lower · Passed
APP - Majority; do pass with amendment(s) by Health Care & Wellness.
lower
Mar 2, 2026
Lower · Passed
Executive action taken in the House Committee on Appropriations at 10:30 AM.
lower
Feb 27, 2026
Lower · Passed
Public hearing in the House Committee on Appropriations at 10:30 AM.
lower
Feb 25, 2026
Committee
Referred to Appropriations.
lower
Feb 24, 2026
Lower · Passed
Minority; without recommendation.
lower
Feb 24, 2026
Lower · Passed
HCW - Majority; do pass with amendment(s).
lower
Feb 24, 2026
Lower · Passed
Executive action taken in the House Committee on Health Care & Wellness at 1:30 PM.
lower
Feb 18, 2026
Lower · Passed
Public hearing in the House Committee on Health Care & Wellness at 1:30 PM.
lower
Feb 11, 2026
Upper · Passed
Floor amendment(s) adopted.
upper
Jan 30, 2026
Upper · Passed
Executive action taken in the Senate Committee on Health & Long-Term Care at 8:00 AM.
upper
Jan 20, 2026
Upper · Passed
Public hearing in the Senate Committee on Health & Long-Term Care at 10:30 AM.
upper
1 primary · 9 co-sponsors
Sponsors
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