HealthyMarks in Encinitas's Cardiff-by-the-Sea specializes in Medicare Advantage, Medicare Supplement, and Part D prescription drug plan enrollment from its Chesterfield Drive office. Founded in 2016 as a business health insurance brokerage, the agency expanded into Medicare and now pairs coverage selection with the retirement income planning that Stone Steps Financial provides for pre-retirees along the coast. The brokerage holds contracts with every major Medicare carrier in San Diego County, enabling side-by-side premium, copay, and network comparisons across all available plan types. The agency's beneficiary designation reviews and trust-held policy guidance dovetail with the elder law structures that Family-Advocates prepares for Cardiff-area retirees. Detailed plan analyses compare Part D formulary tiers, step-therapy protocols, prior-authorization requirements, and specialty drug coinsurance caps across competing carrier filings.