Yes, you can have Medi-Cal and other health insurance at the same time in California. Picking up a job-based plan, joining a spouse’s policy, buying marketplace coverage, or aging into Medicare does not end your Medi-Cal enrollment on its own. What matters is your income: if you still fall within the Medi-Cal limits, both plans stay active. Two things you have to do, though: tell your county within 10 days, and let your other insurer pay first.
Why a Second Plan Does Not End Your Medi-Cal
Medi-Cal eligibility turns on household income, not on whether you carry another policy. Federal law actually pushes in the other direction: it requires state Medicaid programs to identify beneficiaries who have other coverage and pursue those insurers for payment, because the state would rather have a private plan pay first than pay the whole bill itself.1Office of the Law Revision Counsel. 42 USC 1396a – State Plans for Medical Assistance
For 2026, most adults qualify for Medi-Cal if household income stays at or below 138 percent of the federal poverty level: about $1,836 per month for a single person and $3,795 per month for a family of four.2Covered California. Program Eligibility by Federal Poverty Level for 2026 Enrolling in a spouse’s plan or accepting employer coverage does not by itself push you past those numbers. A raise that comes with a new job might, but that’s a separate question from whether you can hold two plans.
You Have 10 Days to Report the Other Coverage
California’s Welfare and Institutions Code gives you 10 days to notify your county welfare department once you gain any other health coverage. Employer plans, a spouse’s or parent’s policy, COBRA, and marketplace plans all count. The clock starts the day the new coverage takes effect, not the day the insurance card shows up in the mail.3California Legislative Information. California Code WIC 14000-14029.5
Deliberately failing to report is a misdemeanor under state law. So is using Medi-Cal to pay for a service your other insurance covers without billing that insurer first.3California Legislative Information. California Code WIC 14000-14029.5 Reporting also protects you on the practical side. Once the state’s records show your other plan, providers bill in the right order and you avoid claim denials that look, from the outside, like fraud.
How to Report
Have this ready before you contact the state: the carrier’s name, the type of coverage, the policy and group numbers from the card, and the effective date. If the plan is through someone else, you also need the subscriber’s name, Social Security number, and their relationship to you.
The fastest route is the BenefitsCal online portal at BenefitsCal.ca.gov, which timestamps your report electronically. You can also call or visit your local county social services office, where a caseworker enters the information into the eligibility system directly. A third option is mailing the Health Insurance Questionnaire, form DHS 6155, to the Department of Health Care Services in Sacramento.4Department of Health Care Services. Medi-Cal Eligibility Procedures Manual Letter No. 155 Whichever channel you use, keep your own copy. Confirmation from the state can take several weeks, and your copy is the proof that you met the deadline.
How the Two Plans Pay
Your private insurer is always the primary payer. Providers bill the commercial plan first, and Medi-Cal reviews what is left over.5Department of Health Care Services. APL 22-027 – Third Party Liability and Cost Avoidance This “payer of last resort” rule is written into both federal and California law.
In practice: you see a provider, the provider submits the claim to your private insurer, and the insurer pays under your plan’s terms. The remaining deductible, copay, or non-covered amount goes to Medi-Cal. If the service falls within Medi-Cal’s covered benefits, Medi-Cal pays up to its own rate. Most of the time, that closes out your out-of-pocket costs.
You Cannot Be Billed for the Balance
Providers who take Medi-Cal must accept the combined payment from your private insurer and Medi-Cal as payment in full. They cannot send you a bill for the difference. Federal regulation requires Medicaid providers to treat the state’s payment plus any permissible cost-sharing as complete payment for the service.6eCFR. 42 CFR 447.15 – Acceptance of State Payment as Payment in Full If a bill for the balance shows up anyway, it is not a legitimate bill; contact your county office or DHCS.
Where It Gets Complicated
The arrangement works cleanly when your provider accepts both plans. Trouble shows up when a specialist in your private plan’s network doesn’t participate in Medi-Cal. The specialist can bill your private insurer, but Medi-Cal may not cover what’s left because the provider isn’t enrolled in the program. Before you see any out-of-network provider, check whether they also accept Medi-Cal. Otherwise you can end up responsible for costs neither plan pays.
Medicare and Medi-Cal Together
The most common dual-coverage situation in California is Medicare plus Medi-Cal. People who hold both are called dual eligibles, sometimes “Medi-Medis.”7Department of Health Care Services. Full and Partial Dual Eligibility It typically applies to adults 65 and older, or to people with disabilities who qualify for Medicare through work history or Social Security and whose income is low enough for Medi-Cal.
The order is the same: Medicare pays first, Medi-Cal pays second. Medicaid never pays before Medicare.8Medicare. Medicare Coordination of Benefits Getting Started For full dual eligibles, Medi-Cal often covers Medicare premiums, deductibles, and copayments that would otherwise be out-of-pocket. Full duals are enrolled in Medicare Parts A, B, and D alongside Medi-Cal, and they can join a Medicare Advantage plan, including Dual Eligible Special Needs Plans designed for this population.7Department of Health Care Services. Full and Partial Dual Eligibility
The Qualified Medicare Beneficiary program is the piece worth knowing about. If your monthly income is at or below $1,350 as an individual or $1,824 as a married couple, and resources don’t exceed $9,950 individual or $14,910 couple, QMB pays your Medicare Part A and Part B premiums plus all Medicare deductibles, coinsurance, and copayments. Under QMB, Medicare providers cannot bill you for cost-sharing on Medicare-covered services.9Medicare. Medicare Savings Programs
When Medi-Cal Will Pay Your Private Premiums
California runs a voluntary program called Health Insurance Premium Payment, or HIPP, that can reimburse you for the premiums on your private policy. The state’s calculation is simple: if paying your premium is cheaper than paying for your medical care directly, keeping you on the private plan saves money.10Department of Health Care Services. Cost Avoidance / Health Insurance Premium Payment (HIPP)
To qualify, you need full-scope Medi-Cal (not restricted or partial), an existing private policy already in place, a medically confirmed condition covered by that private plan with treatment received within 90 days of applying, enrollment in fee-for-service Medi-Cal rather than managed care, and a cost-effective ratio between your premiums and what Medi-Cal would otherwise spend on your care.
HIPP is not available if you have Medicare, TRICARE, or Medi-Cal managed care.10Department of Health Care Services. Cost Avoidance / Health Insurance Premium Payment (HIPP) It’s worth investigating if you recently qualified for Medi-Cal but want to keep seeing specialists in your existing plan’s network while a condition is being treated. Contact DHCS to start the application.
If Your Income Rises Past the Medi-Cal Limit
Getting employer coverage often comes with a raise, and if household income clears the 138 percent FPL line, you will lose Medi-Cal eligibility at your next redetermination. It doesn’t happen the moment the raise hits; your Medi-Cal continues until the state formally reviews your case. Plan for the transition anyway.
Covered California handles the handoff. Once the state finds you no longer qualify, Covered California mails an eligibility notice, and in many cases it auto-enrolls you in the lowest-cost Silver marketplace plan so you don’t have a gap. You then have 90 days from your last day of Medi-Cal to confirm the plan, switch, or cancel.11Covered California. You Don’t Qualify for Medi-Cal Anymore – Now What Miss the window and you may be uninsured until the next open enrollment.
One point people miss: you cannot receive Affordable Care Act premium tax credits for any month you were eligible for Medi-Cal.12Internal Revenue Service. Premium Tax Credit (PTC) Overview The subsidies only start once Medi-Cal eligibility formally ends. If you buy a marketplace plan while still enrolled in Medi-Cal, that plan will not carry subsidies for the overlap months. Report income changes on time so the switch is clean and the tax credits begin as soon as you qualify for them.