Illinois Medicaid MCO Transition 2027: Contracting, Billing & Continuity Checklist

Illinois just signed off on the biggest Medicaid managed care deal in state history — $140 billion over the initial term, and up to $431 billion if the state renews. Six health plans won new HealthChoice Illinois contracts. They go live January 1, 2027, and the current contracts expire December 31, 2026.

If you run a home care or home health agency in Illinois, that one sentence decides whether you get paid in January. Every active client is tied to a plan, and you can only bill the plans you’re contracted with. So this isn’t a “read it later” headline — it’s a contracting and billing to-do list with a hard deadline.

Here’s exactly what changed, what it means for your revenue, and the checklist to get ahead of it before go-live.

What changed with HealthChoice Illinois for 2027?

Illinois HFS awarded new HealthChoice Illinois contracts to six Medicaid managed care organizations (MCOs), effective January 1, 2027. It’s the first competitive procurement of these contracts since 2018. HealthChoice Illinois covers roughly 2.4 million Medicaid members — about one in five Illinoisans — and these contracts set the rules for how their care, including home and community-based services, gets managed and paid for.

The headline for agencies: Humana is the only brand-new plan. The other five are returning. But “returning” does not mean “nothing changes for you” — more on that in a second.

Plan	Coverage area	Status for 2027
Aetna Better Health of Illinois	Statewide	Returning
Blue Cross and Blue Shield of Illinois (a Health Care Service Corporation company)	Statewide	Returning
Humana	Statewide	New
Meridian Health Plan of Illinois	Statewide	Returning
Molina Healthcare of Illinois	Statewide	Returning
CountyCare Health Plan	Cook County only	Returning

The initial contract term runs 4.5 years, with an option to renew for up to 5.5 more — which is where the up-to-$431 billion figure comes from.

Why Humana is the plan to watch

Humana is the only new HealthChoice Illinois plan for 2027, and getting contracted with it early is the single biggest opportunity in this whole transition. Humana already runs special needs plans in Illinois, but it’s brand new to HealthChoice managed care — which means it’s building its provider network from the ground up.

For your agency, “from the ground up” cuts both ways. There are no existing HealthChoice provider contracts, rates, or authorization history to lean on, so you’re starting from zero with Humana — credentialing and contracting from scratch. But that blank slate is also the opportunity. Humana needs providers to build out its network, and the agencies that raise their hand first tend to get processed first.

So don’t wait for Humana to come to you. Start your provider relations outreach now, get into their queue early, and you’ll be positioned to bill Humana members the day the contracts go live — while slower agencies are still stuck in credentialing. This is the one plan where being early is a real competitive edge.

Do I need to re-contract with the new Illinois Medicaid MCOs?

Assume yes — with all six. When new MCO contracts take effect, your individual provider agreement does not automatically roll over. Even plans you bill today may require a brand-new provider agreement, with updated credentialing requirements, fee schedules, and service terms. And Humana has no prior HealthChoice relationship with you at all, so that one is new from scratch.

The smart move is simple: assume you need to re-contract with every plan, then confirm what each one actually requires.

Here’s what the process generally looks like:

Submit a provider application through each MCO’s provider portal or contracting team.
Provide current licensure, accreditation, NPI, and taxonomy documentation.
Review and sign the MCO’s updated provider agreement (rates and terms may differ from your current contract).
Complete any required orientation, training, or compliance acknowledgments.
Track your application status closely — MCO contracting teams move at very different speeds.

Before you start applying, get your paperwork in one folder. Missing documents are the most common reason applications stall.

Document	Notes
Active Illinois home care license	HCSA or CHHA, depending on your agency type
NPI Type 1 and Type 2	Individual and organization
Taxonomy code(s)	Matched to your agency type and the services you provide
Certificates of insurance	Current liability and workers’ compensation
W-9 and EFT banking info	For each MCO’s payment setup

How long does MCO credentialing take?

Plan for 90 to 180 days per payer. Most MCOs will open provider contracting in mid-to-late 2026, and credentialing timelines vary widely from one plan to the next. Do the math against a January 1, 2027 go-live and you can see how quickly the runway disappears.

Agencies that wait risk authorization gaps and payment disruptions right when the new contracts start. The fix is to get in line early. Contact all six MCO provider relations teams now to get in the queue — and make Humana your first call, since you’re building that relationship from zero, then work through any other plans you’re not already contracted with.

Will my clients move to a different MCO — and can I still bill?

Enrollment is expected to shift, and if a client lands on a plan you’re not contracted with, you can’t bill for them — even if they’ve been your client for years. Adding Humana to the mix gives members another option, and members can switch plans during open enrollment, including between the awarded plans.

That’s where a lot of agencies are quietly exposed. If you’re only contracted with two or three MCOs today, you’re carrying concentration risk into 2027. The new landscape rewards agencies with broad contracting coverage, because every plan a client might move to is a plan you need to be ready to bill.

There is some breathing room: when members change plans, continuity-of-care rules generally let existing services and authorizations carry for a transition window. But that window is a grace period to get contracted and re-authorized — not a substitute for doing it.

When a client does move, stay on top of the things that actually keep care going and claims billable: existing authorizations, the client’s care plan, approved service hours, caregiver assignments, and any communication coming from the new MCO. This matters most for your high-needs and long-term clients, where a gap in authorization or hours is the fastest way to disrupt care.

How does the 2027 transition affect billing and rates?

You can’t bill all six MCOs the same way, and the new contracts may come with new rates. Each plan has its own claim submission portal or clearinghouse connection, its own payer ID, its own EDI formats, and its own remittance advice layout. Some require specific billing codes, modifiers, or place-of-service values. A wrong payer ID alone is enough to get a clean claim rejected.

Your billing system has to be configured individually for each payer. There’s no “set it once” option across six plans.

On rates: reprocurement usually means updated reimbursement, and rates can go up, down, or stay flat depending on the plan, service type, and region. Some MCOs will ask you to negotiate as part of contracting. Before you sign any fee schedule, know your cost per visit — a rate below cost isn’t a contract, it’s a slow leak — and factor potential rate changes into your 2027 financial projections now, before anything is finalized.

One more thing to watch: any service delivered on or after January 1, 2027 has to go to the correct new plan. Claims that straddle the December-to-January switch are where billing gaps tend to start.

Managing six payers, six sets of billing rules, and a January deadline is a lot to track by hand. GEOH keeps payer assignments, authorizations, and claims for every MCO in one place — so a plan switch doesn’t turn into a missed payment. See how GEOH handles multi-payer billing.

Does EVV change during the transition?

No — your EVV requirements don’t change because the MCOs do. Visits still have to be verified and captured the same way, and your claims to a new plan still have to carry compliant EVV data.

The catch is timing. A payer transition is exactly when missing or mismatched EVV data turns into denials, because you’re submitting to new payer profiles with new rules. Tighten your EVV data hygiene before January so a clean visit doesn’t become a denied claim over a data mismatch.

Your 2027 MCO transition action plan

Break it into three phases so it stays manageable.

Phase 1 — Right now (June 2026)

Pull your current payer-mix report so you know exactly which MCOs you bill today and in what volume.
Start researching Humana’s Illinois provider enrollment process.
Assign one person to own the MCO transition end-to-end. This is the single highest-leverage thing you can do — a transition with no owner is a transition that slips.
Keep an eye on Illinois HFS updates throughout 2026, so a contracting deadline or process change doesn’t catch you off guard.

Phase 2 — Lock in your contracts (June–September 2026)

Gather and organize all your credentialing documents before you start applying.
Submit provider applications to all six awarded MCOs.
Follow up with each plan’s provider relations contact at least every two weeks.
As contracts execute, update your billing system with the new payer profiles and IDs.
Only chase contracts with plans that actually serve your region.

Phase 3 — Go-live (January 2027)

Expect higher-than-normal eligibility mismatch errors in the first two to four weeks as member files get processed.
Run eligibility checks on every active client in the first week of January. Do not assume coverage carried over.
Have a billing escalation contact at each MCO — a real name, not just the general call-center line.

Milestone	Date
Contracts awarded	June 8, 2026
Current contracts expire	December 31, 2026
New contracts go live	January 1, 2027
Initial contract term	4.5 years
Renewal option	Up to 5.5 additional years

Frequently asked questions

Do I have to re-contract with all six MCOs? Assume yes, then confirm. Provider agreements don’t automatically renew under the new contracts, and Humana is brand new. Re-contract where required and verify the rest.

Is my current MCO contract still valid in 2027? Don’t count on it. Even plans you bill today may issue a new provider agreement with updated terms and rates. Confirm in writing with each plan.

Should I add Humana? If Humana serves your region and your clients, yes — and start now. Humana is building its provider network from scratch, so early applicants have an advantage.

Will I lose clients who get reassigned to a different plan? Only if you’re not contracted with their new plan. Continuity-of-care rules buy you a transition window, but you have to be contracted and re-authorized to keep billing.

What if I serve dual-eligible (FIDE-SNP) members? Keep a close eye on HFS guidance and verify payer information carefully for these clients, because dual-eligible billing is where errors happen most. Make sure every claim goes to the correct plan — FIDE-SNP billing mistakes are a common source of denials and payment delays.

Does EVV change? No. EVV rules stay the same — but a payer switch is the highest-risk moment for EVV-related denials, so clean up your data before go-live.

What about claims for services that span December 2026 and January 2027? Services delivered on or after January 1 go to the correct new plan. Verify eligibility and authorizations under the new MCO before you bill anything in the new year.

You don’t have to navigate this alone

Six MCOs, new contracts, new fee schedules, and a January 1 deadline is a lot — especially while you’re still running your agency day to day. That’s exactly the kind of thing GEOH is built to make manageable:

Track payer assignments by member in one centralized platform — no more spreadsheet guessing.
Update payer profiles and billing rules as MCO contracts finalize throughout 2026.
Real-time claim tracking across all six MCOs from a single dashboard.
Built-in alerts for authorization expirations and payer-coverage mismatches.
A billing team that stays current on each MCO’s requirements, so your staff doesn’t have to.

The agencies that start preparing now will have far fewer disruptions on January 1, 2027. Want help getting ready? Book a quick demo and we’ll walk you through it.