The Social Security Administration field office at 626 L Street in Chula Vista serves the South Bay's 91910, 91911, 91913, 91914, and 91915 ZIP codes for retirement-benefit applications, disability claims, Medicare enrollment, survivor benefits, and replacement Social Security card requests. Seniors navigating the transition from employment to fixed income coordinate benefits timing with residential-care planning at communities such as Pacific Pointe Independent Living, where SSA income thresholds determine supplemental-program eligibility. Effective January 2025, the SSA mandated advance appointments for all in-person services at this location, replacing the previous walk-in model and requiring callers to schedule through the national line at 1-800-772-1213 or the local number at 1-888-487-9907. The office processes initial disability determinations under Title II (SSDI) and Title XVI (SSI) of the Social Security Act, with medical-evidence development that often involves coordination with treating physicians and Medi-Cal providers. Medicare Part A and Part B enrollment windows align with the 65th-birthday eligibility trigger, and beneficiaries seeking Medigap supplemental coverage often work concurrently with brokers at agencies such as Willy's Insurance Service Inc. Complex overpayment-recovery cases and Title II earning-record corrections represent the office's highest-complexity casework, requiring SSA-561-U2 appeal filings within 60 days of initial determination.