Source-backed quick answer
Medicaid claims and state billing checks
Medicaid claims should be checked by state program, managed care plan, eligibility status, claim type, payer routing, filing deadline, and coordination with Medicare or commercial coverage before claim release or appeal.
Medicaid.gov provides federal Medicaid information, but claim filing and billing rules are controlled by each state Medicaid agency or managed care plan.
- State Medicaid rule check
- Eligibility and managed care review
- Payer order and COB check
- Timely filing and appeal packet
Official sources
Medicaid Billing Overview for Healthcare Providers
Medicaid is a joint federal-state program that provides health coverage to approximately 90 million Americans, including low-income adults, children, pregnant women, elderly adults, and people with disabilities. Unlike Medicare, which operates under uniform national rules, Medicaid is administered by each state individually under broad federal guidelines. This means billing rules, covered services, reimbursement rates, and administrative requirements vary significantly from state to state.
The shift toward Medicaid managed care has added another layer of complexity. Over 70% of Medicaid beneficiaries are now enrolled in managed care organizations (MCOs) rather than traditional fee-for-service Medicaid. Major Medicaid MCOs include Centene, Molina Healthcare, Amerigroup (owned by Elevance Health), UnitedHealthcare Community Plan, and WellCare (owned by Centene). Each MCO has its own provider network, prior authorization requirements, and billing procedures, even within the same state.
Provider Enrollment Requirements
Before billing Medicaid, you must enroll as a provider with your state Medicaid agency AND with each Medicaid MCO operating in your area. State enrollment typically takes 30 to 90 days and requires documentation of licensure, malpractice insurance, NPI, and practice information. MCO enrollment is separate and may take an additional 30 to 60 days. You cannot bill retroactively to before your enrollment effective date.
Many states require annual or biennial re-enrollment, and failing to re-enroll on time results in suspension of payment. CMS requires states to screen and revalidate all Medicaid providers under a risk-based framework. New providers and those changing practice information go through identity verification, licensure checks, and (for high-risk categories) site visits. Keep your enrollment current across all MCOs and the state fee-for-service program to avoid payment disruptions.
If you serve patients across state lines, you may need enrollment in multiple state Medicaid programs. Each state has its own enrollment process, and there is no national Medicaid provider enrollment system. Some states participate in the National Plan and Provider Enumeration System (NPPES) cross-referencing, but enrollment remains a state-by-state process.
Timely Filing by State
Medicaid timely filing deadlines vary widely. Texas fee-for-service requires claims within 95 days. California allows 6 months (180 days). New York sets a 90-day deadline. Florida allows 365 days. Pennsylvania requires 180 days. Ohio sets 365 days for fee-for-service but MCOs may require as few as 90 days. Always verify the specific deadline for both the state program and the patient’s MCO, as they frequently differ.
For Medicaid MCO claims, the MCO’s contractual timely filing deadline applies, not the state fee-for-service deadline. Most Medicaid MCOs set 90 to 180 day filing windows. Some MCOs grant extensions for claims held pending third-party liability resolution or coordination of benefits determination. Request extensions in writing before the original deadline expires.
When Medicaid is the secondary payer (behind commercial insurance or Medicare), the timely filing clock typically starts from the date of the primary payer’s EOB, not the date of service. This gives you additional time to submit the claim after the primary payer processes it. Document the primary payer EOB date carefully, as this is your proof of timely filing for secondary Medicaid claims.
Managed Care vs. Fee-for-Service Billing
Determine whether your patient is in Medicaid managed care or fee-for-service before billing. The patient’s Medicaid ID card shows the MCO name if they are in managed care. You can also check through your state’s Medicaid eligibility verification system. Billing the wrong entity (sending an MCO claim to state Medicaid or vice versa) results in a denial and wastes time.
For managed care claims, bill the MCO using their specific payer ID and claims address. Each MCO has its own electronic payer ID, which may vary by state. For example, Centene uses different payer IDs for its Texas subsidiary (Superior Health) than for its Illinois subsidiary (Meridian Health). Your clearinghouse should have the correct routing, but verify during setup.
Fee-for-service claims go directly to the state Medicaid fiscal agent. Each state contracts with a fiscal agent (like Gainwell Technologies, DXC Technology, or Conduent) to process fee-for-service claims. These fiscal agents maintain the state’s MMIS (Medicaid Management Information System) and generate remittance advice. Verify claims through the state’s provider portal after submission.
Prior Authorization and EPSDT
Prior authorization requirements vary by state and MCO. Common services requiring Medicaid prior auth include non-emergency hospital admissions, select outpatient surgeries, advanced imaging, specialty referrals in HMO-type plans, durable medical equipment, home health services, behavioral health beyond initial assessment, and non-emergency medical transportation. Each MCO publishes its prior auth list on its provider website.
EPSDT (Early and Periodic Screening, Diagnostic, and Treatment) is a Medicaid benefit for children under 21 that requires states to cover any medically necessary service, even if it is not otherwise covered under the state Medicaid plan. This is a powerful tool for pediatric providers. When a service is denied for a Medicaid patient under 21, consider whether it qualifies under EPSDT. EPSDT appeals have a high success rate because the benefit standard is broader than standard Medicaid coverage.
Many states are implementing electronic prior authorization (ePA) through platforms like Availity, Surescripts, and CoverMyMeds. Electronic submission reduces prior auth turnaround from days to hours for standard requests. If your state or MCO supports ePA, integrate it into your workflow to reduce authorization delays and associated claim denials.
Dual-Eligible Billing (Medicare/Medicaid)
Approximately 12 million Americans are dual-eligible, meaning they have both Medicare and Medicaid coverage. For these patients, Medicare is always the primary payer. Bill Medicare first for all Medicare-covered services. After Medicare processes the claim, Medicaid covers the patient’s cost-sharing amounts (deductible, coinsurance, and copay) up to the Medicaid fee schedule limit.
Many states have automatic crossover agreements with Medicare, where Medicare electronically forwards processed claims to the state Medicaid program. If your state has automatic crossover, you do not need to separately submit claims to Medicaid for dual-eligible patients. Check with your state Medicaid agency to confirm whether automatic crossover is active and which claim types are included.
For services not covered by Medicare but covered by Medicaid, bill Medicaid directly as the primary payer. Common examples include dental services, vision services for adults, non-emergency transportation, and certain long-term care services that fall outside Medicare coverage. Verify Medicaid coverage before providing these services, as coverage varies significantly by state.