The program that manages the other programs.
California has many home-based programs: IHSS for caregiver hours, CBAS for day health, the Assisted Living Waiver for facility services. What families often lack is someone to assemble them into a plan and keep it working as the parent changes. That is what the Multipurpose Senior Services Program does.
MSSP is a Medi-Cal Home and Community-Based Services waiver. Its participants are seniors who qualify for a nursing home but want to stay home, and its core product is care management: a nurse and social worker who own the care plan.
Who it serves.
Eligibility has four parts: 65 or older, full-scope Medi-Cal, certified for a nursing-facility level of care, and living in an MSSP site's service area. That population, nursing-home-eligible but living at home, is the same one PACE and the Assisted Living Waiver serve, so MSSP is usually evaluated alongside them rather than in isolation.
What it buys.
Beyond coordination, MSSP can purchase the gap services that no single other program covers: respite for an exhausted family caregiver, adult day care, minor home modifications such as grab bars and ramps, personal care, and limited transportation. It does not replace IHSS, which pays for caregiver hours; it layers on top, and the MSSP care manager helps run the IHSS piece too.
The two catches: slots and CalAIM.
MSSP is capped. The number of slots statewide is limited, so waitlists are common and you should apply early through the site that serves your county, leaning on IHSS and CBAS in the meantime. MSSP is also in transition: under CalAIM, California is shifting long-term services toward managed care and moving MSSP-style supports into CalAIM Community Supports. If an MSSP site is full, ask your parent's Medi-Cal managed care plan what Community Supports, such as care management and home modifications, it offers in MSSP's place.