Before you start

Idaho residence
Income information for subsidy or Medicaid eligibility
An SSN or ITIN for marketplace applications
A qualifying life event, if enrolling outside 15 October to 15 December

Step-by-step

1
Put 15 December in your calendar the week you arrive
Your Health Idaho's Open Enrollment runs 15 October to 15 December each year. It is earlier and shorter than the federal window used by most states, and no national reminder will give you the right date.
OnlineWho: YouImmediately
2
Enrol in your employer's plan within the new-hire window
Typically 30 days from your start date. Compare the deductible and out-of-pocket maximum rather than the premium alone — the large local employers and the two hospital systems generally offer the strongest plans in the valley.
Via employerWho: YouFirst 30 days of employment
3
Without an employer plan, use Your Health Idaho
Idaho runs its own exchange rather than HealthCare.gov, and it is where the advance premium tax credit is applied. Moving to Idaho is itself a qualifying life event, which opens a Special Enrollment Period outside the annual window — use it rather than waiting for October.
OnlineWho: You
4
Check Idaho Medicaid first
Idaho expanded Medicaid after a 2018 ballot initiative, so low-income adults are covered with no premium and enrolment runs all year with no window at all. Applications go through the Department of Health and Welfare.
OnlineWho: You
5
Register with a primary care practice early
Idaho has one of the lowest ratios of physicians to population in the country, so wait times for a new patient appointment are long. Community health centres charge on a sliding fee scale regardless of insurance status. Get onto a list while you are healthy.
In personWho: You
6
Take air quality seriously if anyone in the household has asthma
Winter inversions and late-summer wildfire smoke both push particulates well past healthy levels for days or weeks at a time. AirNow gives the current reading, and it is a better guide than the forecast for whether to be outdoors.
Mobile appWho: You

Documents you’ll need

Proof of Idaho residence
Income documentation for subsidies or Medicaid
SSN or ITIN
Immigration documents for marketplace eligibility categories
Evidence of your move or of losing prior coverage, for a Special Enrollment Period

Things most newcomers don’t know

Idaho's Open Enrollment ends on 15 December, not in January.

Your Health Idaho runs 15 October to 15 December each year. Most states use the federal window that runs into mid-January, so every national article, every reminder email from a former insurer and every friend elsewhere gives Idahoans the wrong date. Missing it means no marketplace coverage for a full year unless you qualify for a Special Enrollment Period. This is the single most expensive mistake available to a newcomer in this state.

Source: Your Health Idaho — apply and enroll

Moving here is itself a qualifying life event.

You do not have to wait until October. A permanent move opens a Special Enrollment Period, so a newcomer arriving in March can enrol in March. People sit uninsured for months because they assume the annual window is the only door.

Source: Your Health Idaho — apply and enroll

Medicaid has no enrolment window and the marketplace does.

Idaho expanded Medicaid following a 2018 ballot initiative, covering low-income adults with no premium, and applications are accepted year-round. If your income might qualify, check at any time of year rather than waiting for the marketplace window.

Source: Idaho Department of Health and Welfare — Medicaid for adults

Air quality here is a health variable, not a weather one.

Winter inversions trap particulates in the Treasure Valley for days at a time, and late-summer wildfire smoke can persist for weeks. Both routinely push readings into unhealthy ranges in a city otherwise sold on its sunshine, and both matter clinically for asthma, COPD and cardiac conditions. Check AirNow, and note that driving up into the foothills often gets you above a winter inversion entirely.

Source: AirNow — current air quality

Common mistakes to avoid

Using the federal 1 November to mid-January dates and missing Idaho's 15 December close.
Waiting for October when moving to Idaho already opened a Special Enrollment Period.
Going to HealthCare.gov instead of Your Health Idaho.
Not checking Medicaid because you assumed there was an enrolment window.
Choosing on premium alone and meeting a five-figure deductible in January.

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