Before you start

Residence in Ohio, Kentucky or Indiana — and knowing which
Income information for subsidy or Medicaid eligibility
An SSN or ITIN for the marketplace application
A qualifying life event, if enrolling outside the annual open-enrolment window

Step-by-step

1
Enrol in your employer's plan within the new-hire window
Typically 30 days from your start date, and missing it can mean waiting for the next open enrolment. Compare the deductible and out-of-pocket maximum, not just the premium. Check whether the plan's network covers providers on both sides of the river if you live in one state and work in another.
Via employerWho: YouFirst 30 days of employment
2
Identify which state's system you are in, and use that one
An Ohio address means HealthCare.gov and Ohio Medicaid. A Kentucky address means kynect and Kentucky Medicaid. An Indiana address means HealthCare.gov and the Healthy Indiana Plan. Going to the wrong site wastes time you may not have inside an enrolment window, and moving across the river mid-year is a qualifying life event you must actually report.
OnlineWho: YouWeek 1
3
Check Medicaid eligibility first — all three states expanded
Ohio and Kentucky both cover adults up to 138% of the federal poverty level under plain expansion Medicaid, enrolling year-round. Indiana's Healthy Indiana Plan covers the same population through a waiver with POWER account contributions, which behaves differently and has its own rules. Newcomers on modest early incomes frequently qualify somewhere.
OnlineWho: You
4
Choose the plan by hospital system, not only by premium
UC Health, TriHealth and Bon Secours Mercy dominate adult care on the Ohio side and St. Elizabeth on the Kentucky side, and plan networks are drawn along those lines — and along state lines. Check which system your nearest clinic and preferred hospital belong to before enrolling; switching mid-year needs a qualifying life event.
OnlineWho: You
5
If you have children, check the Cincinnati Children's network explicitly
Cincinnati Children's Hospital Medical Center is among the largest paediatric hospitals and research institutes in the world, and for families managing a complex condition it is frequently the whole reason to be in this metro. Do not assume every marketplace plan — particularly a Kentucky or Indiana one — includes it in network. Confirm it before you enrol.
OnlineWho: You
6
Register with a primary care physician in month one
Do it while you are well. An established relationship is what gets you referrals and urgent slots later, and confirming the practice is in your network before the first visit avoids an out-of-network bill for a routine appointment.
In personWho: YouMonth 1
7
Learn the urgent care versus emergency room distinction
An emergency room visit for something a clinic could treat can cost thousands even when insured. Urgent care handles fractures, stitches and infections far more cheaply, and the metro has plenty of both.
In personWho: You
8
Expect a serious allergy season and a damp, grey winter
The Ohio Valley is a basin that traps pollen and particulates, and spring and autumn allergy seasons here are genuinely severe — newcomers with no history commonly develop symptoms after a season or two. Winters are grey and damp rather than brutally cold. Raise both with a GP in your first autumn rather than in your first bad week.
In personWho: You

Documents you’ll need

Proof of residence in the correct state
Income documentation for subsidies or Medicaid
SSN or ITIN
Immigration documents for marketplace eligibility categories
Evidence of losing prior coverage, or of a move, if using a special enrolment period

Things most newcomers don’t know

Three states, three front doors, and a ten-minute walk between two of them.

Cincinnati uses HealthCare.gov; Covington uses kynect, Kentucky's own state exchange; Lawrenceburg uses HealthCare.gov but with Indiana's Healthy Indiana Plan underneath. These are a bridge apart. People move within the metro, do not think of it as moving state, and then find their application is at the wrong site or their Medicaid case is in the wrong state. Report the move as a qualifying life event and start again in the right system.

Source: kynect / HealthCare.gov

Ohio has no state exchange, so the federal deadline is the only deadline.

Kentucky runs kynect and California runs Covered California, both with their own calendars and extra help. Ohio does not. If you miss HealthCare.gov's open enrolment with an Ohio address and have no qualifying life event, there is no state alternative and you are uninsured until the next window. Diary the date on arrival.

Source: HealthCare.gov

Cincinnati Children's is a reason families choose this metro, and network status is not automatic.

It is among the largest and most heavily research-funded paediatric hospitals in the world, and it draws families here deliberately. But a Kentucky or Indiana marketplace plan may treat an Ohio hospital as out of network, and that is precisely the combination a newcomer in Covington is most likely to end up with. Confirm it explicitly before enrolling.

Source: community-reported

All three states expanded Medicaid, which is the difference from Texas.

An adult earning below the subsidy floor is covered in Ohio, Kentucky and Indiana rather than falling into the hole that persists in non-expansion states. For a newcomer whose first months are lean that is a genuine safety net — though Indiana delivers it as a waiver programme with contributions rather than as plain Medicaid, which is worth understanding before you rely on it.

Source: Ohio Department of Medicaid / Indiana FSSA

Common mistakes to avoid

Applying on HealthCare.gov with a Kentucky address, or on kynect with an Ohio one.
Moving across the river and not reporting it as a change of state.
Missing HealthCare.gov open enrolment and finding Ohio has no state fallback.
Assuming a Kentucky plan covers Cincinnati Children's without checking.
Missing an Ohio Medicaid renewal and losing coverage you still qualified for.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.