Global landscape of cranial prosthesis policies for medical hair loss: a narrative review.

Background: Cranial prostheses (CPs) provide indispensable cosmetic and emotional support for individuals with medical hair loss. However, access remains inconsistent due to variable reimbursement policies and unclear classification as medical vs. cosmetic devices. Objective: To characterize global CP coverage frameworks and evaluate how each predominant healthcare system model structures CP access, reimbursement, and eligibility. Methods: We conducted a narrative review of CP policies across representative countries within the four major healthcare system models: Beveridge, Bismarck, National Health Insurance, and out-of-pocket systems. We synthesized data from peer-reviewed literature, government and insurance policy documents, and nonprofit resources to identify common themes in coverage and access. Results: CP coverage varies widely across healthcare systems. Beveridge systems provide formal inclusion but demonstrate regional and administrative variability. Bismarck systems range from standardized, diagnosis-based reimbursement to insurer-dependent models with variable out-of-pocket costs. National Health Insurance systems often lack explicit CP coverage, relying on supplemental insurance and charitable support. The United States exhibits a highly fragmented coverage model, while out-of-pocket systems largely lack formal reimbursement pathways. Across all models, oncology-related hair loss is more consistently covered than non-oncologic etiologies. Limitations: Heterogeneity in available policy data and reliance on publicly available sources may have limited the scope and completeness of our search. Conclusion: CP coverage is globally inconsistent and frequently insufficient, highlighting the need for standardized recognition of CPs as medically necessary devices to improve equitable access.