Substitute House Bill No. 5377 introduces key amendments to the laws governing claim payments and appeals between health organizations and providers. The bill reduces the time frame for health organizations to cancel, deny, or demand the return of payments for authorized covered services from 18 months to 15 months after receiving a clean claim, with exceptions for fraud or billing errors. It also requires health organizations to provide at least 30 days' advance notice to providers regarding payment cancellations or demands and allows for electronic submission of appeals. If an organization does not respond to an appeal within 12 business days, the appeal will be resolved in favor of the provider. Additionally, the bill establishes new billing requirements for off-site hospital-based facilities, mandating that they include their national provider identifier and federal tax identification number with each claim for reimbursement, effective January 1, 2027. Health carriers are not required to reimburse claims from these facilities unless they comply with this requirement. The bill also prohibits off-site facilities from holding patients liable for payment if claims are not submitted correctly. Overall, the legislation aims to streamline the claims process and enhance transparency and accountability in billing practices for health care services.