Astiva Health Inc. runs an Activity Center and enrollment office at 4551 El Cajon Boulevard Suite B in College Area, San Diego, serving as the East San Diego walk-in location for the company's Medicare Advantage HMO plans available to beneficiaries with Medicare Parts A and B in the 92115 ZIP and across San Diego County. The company is headquartered in Orange, California, and operates Activity Centers in Westminster, Los Angeles (Koreatown Galleria), Monterey Park, and San Jose alongside the College Area San Diego location, building one of Southern California's most diverse provider networks to serve multicultural Medicare-eligible populations. Plan options include the Astiva Health Savings Plan and Chronic Condition Special Needs Plans (C-SNP) designed for beneficiaries managing multiple chronic conditions who benefit from coordinated care management and enhanced benefits beyond Original Medicare. Medicare dental coverage gaps are a primary driver of supplemental-plan enrollment, and Astiva's network includes dental providers throughout the College Area corridor, with practices such as Talmadge Family Dental accepting the plan's in-network reimbursement structure. Supplemental benefits beyond Original Medicare coverage include quarterly over-the-counter product allowances, grocery allowances for qualifying members, transportation to medical appointments, and telehealth access that reduces the travel burden for members in eastern San Diego's residential neighborhoods. The El Cajon Boulevard Activity Center functions as both an enrollment site and a community gathering space, hosting health-education programming and wellness activities that keep members connected to preventive-care resources between provider visits. Primary-care coordination under the HMO structure routes members to in-network physicians for preventive visits, chronic-condition management, and specialist referrals, and Grantville practices including Inspire Wellness with Dr. Habib Dalhoumi serve the Medicare population through the plan's provider network. Enrollment runs by phone, in person at the Activity Center, by mail, by fax, or through the CMS Medicare Online Enrollment Center at Medicare.gov, with bilingual advisors available during annual enrollment and special enrollment periods. The Activity Center's position on El Cajon Boulevard near SDSU places it within the same commercial corridor that houses primary-care and specialty providers serving San Diego's aging population through Astiva's community-based care-delivery model.