How to apply for Montana Medicaid
Last verified: June 2026
Informational — not an official application
Apply for Montana Medicaid through your local DPHHS office or by calling 1-800-362-8312
How to apply for Montana Medicaid
Montana DPHHS processes Medicaid applications through local Human Services offices statewide. There are county-level DPHHS offices throughout Montana — particularly important in a state where driving distances to services can be substantial. Online and phone options are available for those who cannot easily reach a local office.
Online — DPHHS benefits portal
Apply online through the Montana DPHHS economic assistance portal at dphhs.mt.gov. The online application covers Medicaid, CHIP, and other public benefits in one form.
By phone — 1-800-362-8312
Call 1-800-362-8312 to speak with a DPHHS worker who can take your application over the phone, answer eligibility questions, and direct you to your local office. Free interpreter services are available.
In person — local DPHHS office
Visit your county DPHHS office. Montana has local offices in most counties — find your nearest location at dphhs.mt.gov. In-person applications are useful for complex household situations or when document verification is needed on the spot.
By mail — paper application
Download a paper application from dphhs.mt.gov and mail to your county DPHHS office. This is the slowest method. Keep copies of everything you submit and consider using certified mail so you have proof of the submission date.
What you need to apply for Montana Medicaid
DPHHS verifies identity, Montana residency, income, and Social Security numbers. Prepare these documents before starting your application.
- Full legal name and date of birth for all household members applying
- Social Security numbers for all applicants
- Proof of Montana residency — utility bill, lease agreement, or official mail with current address
- Income documentation — pay stubs from the past 30 days, self-employment records, or Social Security award letter
- Immigration documents for non-citizen applicants — green card, visa, work authorization
- Current health insurance information for anyone in the household already covered
- For long-term care applications: physician documentation of care needs
How long does a Montana Medicaid application take?
Federal rules (42 CFR 435.912) require Montana to process most Medicaid applications within 45 days. Disability-based applications can take up to 90 days. Coverage generally begins on the first day of the month you applied, if approved.
Pregnant women may qualify for retroactive coverage covering the three months before their application date. If DPHHS requests additional documentation, respond quickly — missing the document deadline can result in denial.
What documents you'll need
Gather these before starting your application. Having them ready prevents delays caused by missing information requests, which can add weeks to the review.
- Proof of identity — driver's license, state ID, passport, or birth certificate
- Proof of residency in Montana — utility bill, lease, or official mail with your address
- Social Security numbers for all household members applying
- Proof of income for the past 30 days — pay stubs, employer letter, or benefit award letters
- Tax filing information if self-employed — prior year return is typically acceptable
- Immigration documents if applicable — green card, visa, or I-94 arrival/departure record
- Health insurance information if you currently have coverage through an employer or other source
Not every document is required for every applicant. The application will specify what Montana Medicaid needs based on your household composition.
The application process, step by step
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1
Gather your documents
Collect proof of identity, residency, income, and household composition before you start. Having everything ready means you can complete the application in one sitting.
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2
Submit the application
Apply through your preferred method — online is fastest. The application asks about income, household size, citizenship status, and whether anyone in the household has other insurance. Answer completely to avoid requests for more information.
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3
Respond to any follow-up requests
Montana Medicaid may request additional documents or clarification. Respond promptly — delays in providing information can pause or restart the review clock.
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4
Receive your eligibility notice
The agency will send a written notice of approval or denial. If approved, the notice will state your coverage start date and what benefits you're eligible for.
What to expect after you apply
Under 42 CFR 435.912, states must process most Medicaid applications within 45 days of receipt. Applications based on disability take up to 90 days. If Montana hasn't issued a decision by those deadlines, the agency must notify you in writing with the reason for delay.
Medicaid coverage typically starts on the first day of the month in which you applied, assuming you're determined eligible. In some cases — particularly for pregnant women — retroactive coverage going back up to three months may apply if you received qualifying medical services during that period.
Keep your contact information updated while your application is pending. A notice sent to an old address counts as received.
If your application is denied
A denial notice must state the specific reason and your right to appeal. You have the right to request a fair hearing — typically within 90 days of the denial notice — where you can present evidence and contest the decision before an impartial hearing officer.
Common denial reasons include income above the limit, failure to verify documents within the required timeframe, or a missing signature. Many denials can be resolved by reapplying with the correct documentation.
Free application assistance is available