Verify a patient’s Medicaid eligibility before every date of service. That is the short answer to how often to verify Medicaid eligibility, and it holds regardless of when you last saw the patient, when the state last renewed their coverage, or how confident the patient sounds at check-in. Eligibility can change between any two visits, and the only way to know a claim will be payable is to confirm active coverage on the day you deliver care.
Why Every Visit, Not Every Month or Every Year
Medicaid coverage moves. A patient’s status can shift because of a change in household income, an unreturned redetermination form, a move to a different state, new employer-sponsored insurance, or aging out of a coverage category. None of those events will announce themselves to your front desk.
The unwinding period after the pandemic made the scale of this concrete. States processed more than 94 million renewals, and roughly 20.7 million people lost coverage. About two-thirds of those terminations were procedural, meaning the person did not return paperwork rather than actually failing an eligibility test.1MACPAC. State Reported Medicaid Unwinding Data Brief A patient who was covered at their last appointment could easily be one of them by their next.
Federal rules govern how often the state checks the patient, not how often you check the patient. States generally redetermine Medicaid eligibility once every 12 months and cannot do it more frequently for most enrollees, though qualified Medicare beneficiaries can be renewed as often as every six months.2eCFR. 42 CFR 435.916 – Regularly Scheduled Renewals of Medicaid Eligibility Starting January 1, 2027, states must redetermine most adults in the Medicaid expansion group every six months.3Medicaid.gov. SMD 26-001 – Implementation of Eligibility Redeterminations, Section 71107 Shorter renewal cycles mean more chances for a coverage gap to appear between the state’s paperwork and the patient’s next appointment, which only strengthens the case for provider-side checks at every visit.
Visits That Deserve Closer Attention
Every visit gets a check, but some checks warrant more than a glance at the eligibility screen.
- New patients. You have no history and no baseline. Verify before the first appointment and confirm the managed care plan assignment so you know you are in-network.
- Long gaps between visits. Eight months is plenty of time for a redetermination, an income change, or a switch to a different MCO.
- Changes in personal information. A new address, a different household size, or a new Medicaid ID number all point to something moving underneath.
- High-cost services. Before scheduling surgery, imaging, or other expensive procedures, verify eligibility and confirm whether the service requires prior authorization.
- Month-end and month-start visits. Coverage changes usually take effect at the beginning of a month. A patient seen January 31 may not have coverage February 1.
Running the Check Efficiently
Electronic verification takes seconds. A manual phone call can eat ten minutes or more, which is why most practices route eligibility through one of the following:
- State Medicaid provider portals, which show current coverage status when you enter the patient’s name, date of birth, and Medicaid ID.
- Electronic 270/271 transactions, the HIPAA-standard eligibility inquiry and response. Most practice management systems handle these automatically.
- Clearinghouses that integrate with your EHR and route requests to the right payer, useful when you see patients across multiple plan types.
- Automated phone systems, still available in some states as a backup.
High-volume practices run batch eligibility the day before, submitting verification requests for every patient on the next day’s schedule at once. That gives billing staff time to flag lapses and follow up before the patient arrives.
Eligibility Status Is Not the Same as Covered Benefits
Active coverage answers only the first question. Whether the specific service you plan to provide is covered under the patient’s particular plan is a separate check. Medicaid managed care plans vary in covered benefits, prior authorization requirements, and network rules. A patient can have active eligibility and still belong to an MCO that will not pay for the procedure you scheduled without preauthorization. Run a benefits check alongside eligibility on anything beyond routine care.
Check for Other Insurance
Medicaid is the payer of last resort. If the patient has any other coverage, that insurer pays first and Medicaid picks up the remainder under its rules. Federal law requires states to collect information during application and renewal to identify potentially liable third parties, including employer-sponsored plans and workers’ compensation.4Office of the Law Revision Counsel. 42 US Code 1396a – State Plans for Medical Assistance Most electronic eligibility responses flag other coverage when the state has it on file, but patients do not always report new insurance quickly. Ask at check-in whether anything has changed with their other coverage.
When the Check Shows the Patient Is Inactive
This is the situation verification exists to catch. A few steps apply before you go further:
- Confirm it is not a data error. Check that the Medicaid ID, date of birth, and name are entered correctly. Transposed digits and outdated ID numbers are common.
- Ask the patient what they know. They may have a new card, a new MCO, or a lapse they were already aware of.
- Check for a pending status. A patient in the middle of applying or renewing may show inactive during processing. Some state portals display a pending flag.
- Discuss options before delivering non-emergency care. The patient needs to know they may be financially responsible if coverage truly lapsed. Rescheduling non-urgent services until coverage is confirmed avoids a billing problem for both sides.
- Never withhold emergency care. EMTALA requires hospitals to stabilize emergency patients regardless of insurance status. Coverage can be sorted afterward.
Patients who have lost Medicaid may qualify for a special enrollment period on the marketplace, which is worth mentioning during the conversation.
Two Situations Where Coverage May Exist Anyway
A negative eligibility result is not always the last word.
Retroactive Coverage
Federal law allows Medicaid coverage to reach back up to three months before the month a person applies, provided they would have been eligible during those months and had qualifying medical expenses. If you treated an uninsured patient who later obtains Medicaid with a retroactive effective date covering the visit, you can bill Medicaid for that care. Keep documentation thorough so you are able to submit clean claims if retroactive eligibility is confirmed.
Presumptive Eligibility
Certain qualified entities, most commonly hospitals, can grant temporary Medicaid coverage on the spot based on preliminary income and household information. The presumptive period generally lasts until the state makes a formal determination or through the end of the month following the month of determination, whichever comes first.5GovInfo. 42 USC 1396r-1 – Presumptive Eligibility for Pregnant Women Services during that window are billable to Medicaid even if the full application is later denied.
What It Costs to Skip the Check
The financial exposure escalates in tiers.
Denials and Recoupment
A claim for a patient who was not eligible on the date of service will be denied. If payment already went out and the patient is later found ineligible, the state will recoup the overpayment. Federal law gives states one year from the discovery of an overpayment to recover it before the federal government adjusts its share of funding to the state.6Office of the Law Revision Counsel. 42 USC 1396b – Payment to States In managed care arrangements, network providers who receive overpayments must return them within 60 calendar days of identification and explain the reason in writing.7CMS. Managed Care Overpayment Recoveries Toolkit
False Claims Act Exposure
Repeatedly billing Medicaid for ineligible patients can trigger liability under the federal False Claims Act. The statute does not require proof of deliberate fraud. Liability attaches when a claim is submitted “knowingly,” which the law defines to include situations where the provider should have known the claim was inaccurate.8Office of the Law Revision Counsel. 31 USC 3729 – False Claims A provider who never checks eligibility has a hard time arguing otherwise.
Damages are three times the amount the government lost, plus a per-claim civil penalty. As of 2025, that per-claim penalty runs from $14,308 to $28,619 after inflation adjustment.9Federal Register. Civil Monetary Penalties Inflation Adjustments for 2025 Violations can also lead to exclusion from federal healthcare programs, which for most providers ends the practice.
The math on a batch eligibility check versus a False Claims Act investigation is not close. Run the check every visit.