Patient Advocacy Solutions Market By Type (Medical Billing Advocacy, Insurance Navigation Services, Treatment Decision Support, Health Information Advocacy, Clinical Trial Advocacy, and End-of-Life Care Advocacy), By Advocacy Delivery Channels (In-person Advocacy Services, Telehealth and Virtual Advocacy, Phone-based Advocacy Support, Online Advocacy Platforms, and Mobile Applications for Advocacy), By Application (Insurance Coverage and Claims Support, Access To Treatment and Care Coordination, and Medical Billing and Financial Assistance), By Target Patient Populations (Pediatric Patients, Elderly Patients, Patients with Chronic Illnesses, Patients with Disabilities, Cancer Patients, and Mental Health Patients), Industry Analysis, Size, Share, Growth, Trends, and Forecasts 2025-2032