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Medicaid billing

How Medicaid — the joint federal-state program administered state by state — is structured and billed, from eligibility and enrollment to managed care, coordination rules, and program-specific denials.

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What is Medicaid billing?

Medicaid billing is the work of submitting and being paid for services under Medicaid, the joint federal-state program that covers eligible low-income and other qualifying populations. It is administered by each state within federal rules, so its benefits, payment, and billing requirements are state-specific and differ from both Medicare and commercial billing.

This section covers how Medicaid is structured as a federal-state partnership, the difference between fee-for-service and managed Medicaid, the managed care organizations that administer most Medicaid coverage, eligibility categories and coverage verification, provider enrollment, the payer-of-last-resort and third-party-liability rules, dual-eligible and crossover claims, and the denial patterns specific to Medicaid.

Because each state runs its own program, almost every operational detail — covered services, fee schedules, prior-authorization requirements, timely-filing windows, and enrollment steps — is set at the state level and changes. The articles here teach the durable federal framework and the state-specific questions to ask, and point to each state's Medicaid agency and to Medicaid.gov for the current rule, rather than stating any one state's rule as universal.

Where to start

A path from how Medicaid is structured to the denials specific to it. Each article assumes the one before it; the full set continues below.

  1. Understand how Medicaid works

    The joint federal-state design, who Medicaid covers, and why so much of it is decided at the state level.

    Read: How Medicaid works

  2. Tell Medicaid apart from Medicare

    Two programs often confused — different eligibility, funding, administration, and billing — and where they intersect for dual-eligible patients.

    Read: Medicaid vs. Medicare

  3. Know fee-for-service from managed Medicaid

    Whether the state or a managed care organization pays the claim changes where it goes and which rules apply.

    Read: Fee-for-service vs. managed Medicaid

  4. Work with managed care organizations

    Most Medicaid enrollees are in managed care; each plan has its own network, authorization, and billing rules on top of the state's.

    Read: Medicaid managed care organizations

  5. Understand eligibility categories

    Medicaid eligibility is grouped into categories that affect coverage and billing, and eligibility can change month to month.

    Read: Medicaid eligibility categories

  6. Verify coverage before the service

    How to confirm active Medicaid coverage and the right plan, given that eligibility is point-in-time and often managed by a plan.

    Read: Verifying Medicaid coverage

Featured articles

Start here if you are new to Medicaid billing.

How Medicaid works

A structural overview of Medicaid as a jointly funded federal-state program: how it is financed and administered, who qualifies, how services are delivered through fee-for-service and managed care, and how billing rules vary by state, plan, and date.

Updated · 7 min read

Medicaid vs. Medicare

Medicaid and Medicare are distinct public programs with different funding, administration, eligibility bases, and billing rules. This article explains how they differ structurally and what those differences mean for enrollment, claims, and coordination of benefits.

Updated · 6 min read

All articles

20 articles in this section.

Related services

The service that runs billing work like this for a practice.

Related topics

Where Medicaid billing connects to the wider revenue cycle.

Related resources

Operational support for Medicaid billing work.

Key terms to understand

Plain-language definitions, defined once on their glossary pages.

About this section

What does the Medicaid Billing section cover?

How Medicaid is structured as a joint federal-state program and how it is billed: fee-for-service versus managed care, managed care organizations, eligibility categories and verification, provider enrollment, the payer-of-last-resort and third-party-liability rules, dual-eligible and crossover claims, EPSDT and CHIP, and the denials specific to Medicaid. It teaches the durable federal framework and points to each state's program for the state-specific rule.

Why does so much depend on the state?

Because Medicaid is administered by each state within federal requirements. States set covered benefits beyond the federal minimums, choose whether and how to use managed care, set fee schedules and prior-authorization rules, and run their own enrollment and claims systems. A rule that is true in one state may not hold in another, which is why this section teaches the framework and the questions to ask rather than a single set of rules.

Is Medicaid billed the same as Medicare?

No. They are different programs with different eligibility, funding, administration, and rules. Medicare is a federal program; Medicaid is administered by states within a federal framework. The two intersect for dual-eligible patients, where Medicare generally pays first and Medicaid coordinates behind it as payer of last resort — covered in the dual-eligible and crossover-claim articles.

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