The most common reason an eligible person loses Medicaid is mundane: the state sent a renewal notice to an address where they no longer live. The notice comes back marked undeliverable, the deadline passes, and coverage ends. The person often does not learn they were dropped until they try to fill a prescription or see a doctor.
This is address-change churn, and it is one of the most preventable forms of coverage loss in the entire program. Medicaid populations move frequently, and a single missed address update can cascade into a full disenrollment.
Why Addresses Go Stale
Many enrollees moved during and after the pandemic without updating their record with the state. People experiencing housing instability may not have a stable address at all. Some never realized that updating an address with one agency does not update it everywhere. And renewal happens only once a year, so an address can sit wrong for many months before it causes a problem, at the worst possible moment.
How to Close the Gap
Effective programs treat address accuracy as a continuous task, not a renewal-day scramble. Several data sources can flag a stale address before mail goes out: the U.S. Postal Service National Change of Address database, managed care plan records, pharmacy and provider encounter data, and returned-mail logs from prior mailings.
When channels are layered, the safety net tightens. A plan that texts or calls a member whose mail bounced can capture a new address weeks before the renewal notice is even printed. States that allow members to update their address by phone, text, online portal, or through a trusted community partner remove friction at the exact point where it causes harm.
The economics favor prevention strongly. Re-enrolling someone after a procedural drop consumes staff time, creates a gap in care, and often means the person reappears sicker and more expensive. Keeping an address current costs a fraction of that. Address hygiene is not glamorous, but it is among the highest-return investments available in coverage retention.