SBHIS Insurance Services in Chula Vista's Bayfront district has operated as a Medicare-enrollment agency since its 2005 founding, with headquarters at 740 Bay Blvd near the intersection of Bay Boulevard and Marina Parkway in the 91910 zip code. Medicare Advantage and Medicare Supplement plan comparisons factor in provider-network access across Chula Vista's hospital systems, where enrollees weigh copay tiers and specialist referral pathways at facilities including Scripps Mercy Hospital Chula Vista. The agency has expanded to more than 25 offices across California, Arizona, Florida, Hawaii, and Texas, with trilingual English, Spanish, and Vietnamese enrollment support at the Chula Vista headquarters and a second local office on L Street. Part D prescription drug plan enrollees coordinate formulary details with area dispensaries, and the agency's plan-comparison tools account for preferred-pharmacy networks that include locations at South Bay Pharmacy, where tier-1 copay rates apply to generic and preferred-brand medications. The agency's most complex enrollment scenarios involve dual-eligible Medi-Cal/Medicare crossover applications, Special Enrollment Period qualifying-event filings, and Medicare Advantage plan transitions requiring coordination-of-benefits determinations across multiple payer systems.