Medicare vs Medicaid: Eligibility, Work Credits & Immigrant Waiting Periods

Clear breakdown of federal Medicare (Part A, B, D) vs state Medicaid: 40-quarter work requirements, the 5-year lawful permanent resident waiting rule, and low-income thresholds.

Bottom Line Up Front (BLUF)

Clear breakdown of federal Medicare (Part A, B, D) vs state Medicaid: 40-quarter work requirements, the 5-year lawful permanent resident waiting rule, and low-income thresholds.

Statutory Roadmap & Decision Matrix

Phase / Step	Core Requirement	Governing Agency / Portal	Statutory Fee	Standard Timeline
Step 1	Determine if You Have 40 Work Credits (10 Years of Work)	Centers for Medicare & Medicaid Services	$0	15 minutes
Step 2	Review the 5-Year Immigrant Waiting Rule	Centers for Medicare & Medicaid Services	$0	Evaluation
Step 3	Enroll During the Initial Enrollment Period (IEP)	Centers for Medicare & Medicaid Services	Premiums	Enrollment window

Step 1

Determine if You Have 40 Work Credits (10 Years of Work)

To receive premium-free Medicare Part A (hospital insurance), you or your spouse must have worked and paid Medicare taxes for at least 40 quarters (10 years). If you have fewer than 30 credits, Part A can cost over $500/month.

Step 2

Review the 5-Year Immigrant Waiting Rule

Under the 1996 PRWORA law, green card holders must have lived lawfully in the United States as permanent residents for at least 5 continuous years to qualify for Medicaid and premium-free Medicare, unless an exception applies.

Step 3

Enroll During the Initial Enrollment Period (IEP)

Your 7-month IEP begins 3 months before the month you turn 65, includes the month you turn 65, and ends 3 months after. Missing this window incurs a permanent lifetime 10% penalty for every 12-month period you were eligible for Part B but did not enroll.

Medicare vs Medicaid: Eligibility, Work Credits & Immigrant Waiting Periods

Statutory Roadmap & Decision Matrix

Determine if You Have 40 Work Credits (10 Years of Work)

Review the 5-Year Immigrant Waiting Rule

Enroll During the Initial Enrollment Period (IEP)

Recommended Civic Portals & Core Resources

Explore Related Federal Form Dossiers & Tools