California Medicare Part A Buy-In: How SB 311 Changed QMB Access

The Old Barrier: Conditional Part A and the Three-Month Window

Before 2025, getting QMB without premium-free Part A was a multistep ordeal. A person who lacked 40 quarters of U.S. work history — common among immigrants, homemakers, and people who worked primarily in non-covered government employment — had to:

1. Visit a Social Security office during the General Enrollment Period (January 1 through March 31 only)
2. File a "conditional Part A" enrollment application
3. Wait for SSA to process the conditional enrollment
4. Then apply for QMB at the county welfare department

This process could stretch for months, left people without Part A coverage in the gap, and was available only three months out of every year. Miss the January–March window, and wait until next year.

What SB 311 Changed

Senate Bill 311 (codified as WIC § 14005.11) made California a Medicare Part A Buy-In state effective January 1, 2025. The implementing guidance came through MEDIL I 25-01.

The practical impact is straightforward: the conditional enrollment step at Social Security is eliminated. The county welfare department handles everything.

Here's how it works now:

1. Your parent applies for QMB at the county welfare office — any time of year, no restriction to the January–March GEP
2. The county evaluates QMB income (gross limit $1,330/mo single, or a countable ceiling of $1,350 after the $20 disregard) and countable assets (up to $130,000 single)
3. If approved for QMB (Aid Code 80), DHCS automatically enrolls the individual into Part A through the state buy-in file
4. The state pays the applicable Part A premium directly to CMS — $565 per month in 2026 for someone with fewer than 30 work quarters
5. No late enrollment penalties apply

There's no conditional enrollment, no SSA office visit, no waiting for a specific enrollment period. The county does it all.

Who This Helps Most

The Part A Buy-In primarily benefits three groups:

Immigrants who meet current eligibility rules but have limited work history. A Lawful Permanent Resident who came to the U.S. at age 60 and never accumulated 40 quarters of covered employment can qualify for QMB — and therefore Medicare Part A — through a single county application at any time of year. Previously, they'd need to navigate both SSA and the county system during a narrow enrollment window.

Effective October 1, 2026, H.R. 1 narrowed federal Medicaid eligibility for some qualified non-citizens. Under ACWDL 26-13, California's transition plan uses State General Funds to maintain MSP buy-in coverage for affected residents through early 2027.

People who worked in non-covered employment. Government employees in certain state and local retirement systems, railroad workers, and others who paid into systems other than Social Security may lack premium-free Part A. The buy-in covers their Part A premium through QMB.

Anyone who missed the GEP. Under the old rules, missing the January–March enrollment window meant waiting until the next year. The buy-in eliminates that timing trap entirely.

What the County Does After Approval

Once the county approves QMB for someone in the Part A Buy-In, the data flows automatically:

• CalSAWS updates the county record
• DHCS transmits the buy-in accretion to CMS via the State Medicare Modernization Exchange
• CMS enrolls the individual in Part A
• SSA receives notification and stops any premium deduction from the benefit check

The full cycle takes 60 to 90 days.

Outdated Advice Is Still Circulating

Many advocacy guides, legal aid websites, and even county outreach materials still instruct California applicants without work credits to file a conditional Part A application at Social Security before applying for QMB at the county. That guidance became obsolete on January 1, 2025.

If someone at the county office tells your parent they need to go to Social Security first, cite MEDIL I 25-01 and SB 311. The county is authorized to process the application directly.

The Full QMB Application With Part A Buy-In

Our California Medicare Savings Programs & Extra Help Guide walks through the complete Part A Buy-In process — from gathering documents for the county application to tracking the accretion timeline through MEDS, including what to do if the county worker isn't familiar with the post-SB 311 procedure.

See more California guides →