Get tools and guidelines from Aetna to help with submitting insurance claims and collecting payments from patients. Subrogation for health plans.Identify, investigate, recover and prevent inaccurate payments linked to accident-related medical and disability expenses. The Anti-Subrogation Rule ("ASR") is a common law defense to subrogation. You'll need to fill out a claim form. You must file claims within 120 days from the date you provided services, unless there's a contractual exception. In California, state law provides that a health Plan has a specific right to intervene into the workers' compensation proceeding and seek reimbursement. A network pharmacy may refuse to fill a prescription order or refill when in the professional judgment of the pharmacist the prescription should not be filled. We encourage you to check out your personalized member site. Tiered subcontractors who unknowingly cover up a defect are not subject to the fraud exception.