Medicaid is a joint federal and state insurance program for people with low income
Medicaid is health insurance paid for by federal and state governments, designed for people and families whose income falls below a certain threshold. Unlike Medicare, which is based on age or disability status, Medicaid is based almost entirely on how much money you make. Each state runs its own Medicaid program within federal guidelines, which means the income limits, covered services, and enrollment process differ depending on where you live.
Medicaid covers doctor visits, hospital stays, prescription medications, mental health services, and long-term care in many cases. It is not a loan or a program you pay back — it is insurance coverage funded by tax dollars. You do not need to have worked to receive it, and you do not need to be a U.S. citizen in all cases (some states cover certain immigrants regardless of status).
Key Takeaways
- Medicaid is state-run health insurance for people with low income, and income limits vary significantly by state and family size.
- Coverage includes doctor visits, hospital care, prescriptions, and emergency services, though each state decides which additional services to cover.
- You do not pay premiums in most cases, though some states charge small copays when you use services.
- Enrollment is open year-round in most states, unlike private insurance, so you can sign up whenever your income drops or you lose other coverage.
- Your state's Medicaid office determines whether you meet income and other requirements, and the process takes one to three weeks in most cases.
How income limits work and why they vary by state
Medicaid income limits are set as a percentage of the federal poverty line, which changes each year. For 2024, the federal poverty line for a single adult is around $15,000 per year, and for a family of four around $31,000. However, states can set their own limits higher or lower than this baseline. Some states cover people earning up to 138% of the poverty line, while others cover only those at 100% or less.
Your household size matters as much as your total income. A family of four can earn more than a single person and still be within the limit. When you contact your state's Medicaid office or use their online tool, you enter your household size and monthly income, and the system tells you whether you fall within that state's threshold. If you are self-employed or have irregular income, most states average your income over the past three months or use your most recent tax return.
What Medicaid covers and what it does not
All Medicaid programs must cover certain core services: doctor visits, hospital inpatient and outpatient care, emergency services, lab work, X-rays, and family planning. Prescription medications are covered in all states, though some require you to try a cheaper drug first. Mental health and substance abuse treatment are covered, as is maternity and newborn care.
Beyond these basics, states choose what else to cover. Some states include dental care, vision, hearing aids, and physical therapy; others do not. Long-term nursing home care is covered in all states, but home care services vary. If you need a service your state does not cover, you will have to pay out of pocket or find a different insurance option. When you enroll, your state sends you a handbook or directs you to a website listing exactly what is covered in your state.
Premiums, copays, and out-of-pocket costs
Most people on Medicaid pay no monthly premium — the program is free. However, some states charge small copays when you use services: typically $1 to $5 for a doctor visit or prescription, and slightly more for emergency room visits. A few states charge monthly premiums for certain groups, usually $10 to $50, though these are rare and often waived if your income is very low.
You are responsible for copays at the time of service, but doctors and pharmacies cannot refuse to treat you if you cannot pay. Copays are capped — you will not owe more than a certain amount per year, and once you hit that cap, services are free for the rest of the year. If you receive a bill for a service Medicaid should have covered, contact your state's Medicaid office; billing errors are common and usually corrected quickly.
How to enroll and what documents you need
You enroll through your state's Medicaid office, either online, by mail, or in person. The easiest route is usually your state's website — search "[your state] Medicaid apply" to find the portal. You will need to provide proof of income (recent pay stubs, tax returns, or a letter from your employer), proof of identity (driver's license or passport), and proof of residency (a utility bill or lease). If you are applying for a child, you need proof of the child's citizenship or immigration status.
The enrollment process typically takes one to three weeks. During that time, your state verifies your income and citizenship status. You will receive a notice in the mail or email telling you whether you are approved, denied, or need to provide more information. If approved, you receive a Medicaid card in the mail within one to two weeks. You can use it immediately at any doctor or hospital that accepts Medicaid in your state.
When Medicaid coverage starts and stops
Medicaid is not seasonal like private insurance. You can enroll at any time of year, and coverage usually begins on the first day of the month after you are approved. If you are approved on March 15th, for example, your coverage typically starts April 1st. Some states offer retroactive coverage for up to three months before you applied, which means bills from January, February, and March can be covered even if you did not enroll until April.
Your coverage continues as long as your income stays below your state's limit and you remain a resident of that state. You must report changes in income, household size, or address within 30 days in most states. If your income rises above the limit, your coverage ends, usually at the end of that month. If you move to another state, you must enroll in that state's Medicaid program; coverage does not transfer.
Medicaid versus Medicare and private insurance
Medicaid and Medicare are often confused because of their similar names, but they are completely different programs. Medicare is federal health insurance for people 65 and older, or for some younger people with disabilities or end-stage renal disease. It is based on work history, not income. Medicaid is for people with low income of any age.
Private insurance through an employer or the marketplace is different from Medicaid because you pay premiums and usually have higher copays and deductibles. However, if you lose private insurance and your income is low enough, you can enroll in Medicaid at any time. Some people have both Medicaid and Medicare (called "dual may be able to access"); in those cases, Medicare is primary and Medicaid covers costs Medicare does not.
What happens if your income changes
If your income rises above your state's Medicaid limit, your coverage will end. Most states give you a grace period of one to three months before terminating coverage, so you have time to find other insurance. If you lose your job or your income drops, you can enroll in Medicaid immediately — you do not have to wait for an open enrollment period like you do with private insurance.
If your income fluctuates (for example, you are self-employed or work seasonal jobs), report your expected annual income when you apply. Most states average your income over time rather than looking at a single month. If you are approved and then earn more in one month, that single high month usually does not end your coverage. However, if your average income over several months exceeds the limit, your coverage will terminate.
Frequently Asked Questions
Does Medicaid cover dental and vision care?
It depends on your state. All states cover emergency dental care and some preventive services for children. Adult dental coverage varies widely — some states cover cleanings and fillings, others cover nothing. Vision coverage is similar: most states cover eye exams and glasses for children, but adult coverage is limited or nonexistent in many states. Check your state's Medicaid handbook or website to see what is covered where you live.
Can I use Medicaid at any doctor or hospital?
Not all doctors and hospitals accept Medicaid. Many do, but some private practices and hospitals do not participate in the program. When you receive your Medicaid card, your state provides a list of in-network providers, or you can search online. If you go to an out-of-network provider, you may have to pay out of pocket. Emergency rooms must treat you regardless of insurance status, so emergency care is always covered.
What if I am pregnant and need Medicaid?
Pregnancy is one of the easiest ways to may have access to for Medicaid. Most states cover pregnant people at higher income limits than they cover other adults — sometimes up to 200% of the poverty line. Prenatal care, delivery, and postpartum care are fully covered. In many states, your coverage continues for 60 days after delivery. Contact your state's Medicaid office or your doctor's office to enroll; they can often help with the application.
Can I lose Medicaid if I do not use it?
No. Simply having Medicaid coverage does not cost you anything, and you do not lose it for not using it. Your coverage continues as long as your income stays below the limit and you remain may be able to access. You only lose coverage if your income rises above the threshold, you move out of state, or you fail to report a major change in your household.
Does Medicaid cover prescriptions for all medications?
Medicaid covers most prescription medications, but not all. Each state maintains a list of covered drugs called a formulary. If your doctor prescribes a medication not on the list, you may have to pay out of pocket, or your doctor can request an exception. Some states require you to try a cheaper generic or preferred drug first before covering a brand-name medication. Ask your pharmacist or doctor if a medication is covered before you fill it.